CA1077414A - Container door seal - Google Patents
Container door sealInfo
- Publication number
- CA1077414A CA1077414A CA279,023A CA279023A CA1077414A CA 1077414 A CA1077414 A CA 1077414A CA 279023 A CA279023 A CA 279023A CA 1077414 A CA1077414 A CA 1077414A
- Authority
- CA
- Canada
- Prior art keywords
- arm
- seal construction
- door
- base
- seal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B7/00—Special arrangements or measures in connection with doors or windows
- E06B7/16—Sealing arrangements on wings or parts co-operating with the wings
- E06B7/22—Sealing arrangements on wings or parts co-operating with the wings by means of elastic edgings, e.g. elastic rubber tubes; by means of resilient edgings, e.g. felt or plush strips, resilient metal strips
- E06B7/23—Plastic, sponge rubber, or like strips or tubes
- E06B7/2305—Plastic, sponge rubber, or like strips or tubes with an integrally formed part for fixing the edging
- E06B7/2312—Plastic, sponge rubber, or like strips or tubes with an integrally formed part for fixing the edging with two or more sealing-lines or -planes between the wing and part co-operating with the wing
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Closures For Containers (AREA)
- Gasket Seals (AREA)
- Refrigerator Housings (AREA)
- Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
Abstract
ABSTRACT OF DISCLOSURE
A seal for a container door which has a first resiliently deformable part of predetermined generally channel sectioned shape for application to the edge portions of a container door to preclude the passage of moisture to the door edges, and a second part connected to the first part and having at least one resiliently deformable sealing arm for sealing engagement with a portion of the container around the door opening. In the preferred arrangement, the first and second parts are separate and a third part is provided to connect the two parts together, and in one arrangement the tips of the arms of the channel shaped part are of a softer material than the remainder of the seal. In a second construction, the tip of one of said arms is joined to the remainder of the arm by a softer portion and in this second construction the whole seal may be a one-piece extrusion.
A seal for a container door which has a first resiliently deformable part of predetermined generally channel sectioned shape for application to the edge portions of a container door to preclude the passage of moisture to the door edges, and a second part connected to the first part and having at least one resiliently deformable sealing arm for sealing engagement with a portion of the container around the door opening. In the preferred arrangement, the first and second parts are separate and a third part is provided to connect the two parts together, and in one arrangement the tips of the arms of the channel shaped part are of a softer material than the remainder of the seal. In a second construction, the tip of one of said arms is joined to the remainder of the arm by a softer portion and in this second construction the whole seal may be a one-piece extrusion.
Description
10774~4 This invention relates to a door seal construction specifically designed for use on cargo container doors, but which could be put to many other uses.
Normally, cargo containers have very large doors at one or both ends of the container and these are traditionally made of multi-ply wood, and in order to prevent dust from en-` tering the interior of the container and so as to keep the con-tainer generally airtight and watertight, a seal is normally provided around the periphery of the door (or doors) on the end of the container for engagement with the container around the door opening. This seal, as well as sealing the interior of the container when the door is closed, should also be capable of sealing the edges of the door to which it is applied from the ;~i elements and in particular, capable of preventing moisture from reaching the edges of the door. Needless to say, if water reaches the end faces of the plies making up the door, the door will quickly deteriorate.
Various proposals have been put forward to meet the above requirements and one proposal is to provide a dual duro-meter one-piece H-section seal which does work satisfactorily.
The problem with this seal, however, is that if the portion of the seal for sealing the container, or for that matter the por-tion for sealing the edge of the door, becomes damaged then the whole seal has to be replaced. An alternative proposal has been to provide an extruded flexible container seal portion which can be attached to an extruded metal portion which is fitted to the edge of the door to seal the door. This seal, however, suffers from the disadvantage that the extruded metal portion is rigid ~ and cannot accommodate tolerances in door thickness and unless ; 30 applied with a large amount of some form of mastic or glue it . .
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does not form an entirely watertight seal on the door. Also, - of course, it has to be positively fixed to the door, for ex-` ample with adhesive, nails, screws or the like. Also, metal extrusions are expensive and being rigid are awkward to handle prior to their application to the door edges.
The door seal construction of the present invention has been evolved to meet the above requirements and to overcome the problems which have been experienced with prior proposed seals.
According to the present invention, we provide a three part container door seal construction comprising a first resiliently deformable portion of a predetermined generally channel sectioned shape for application to the edge portions of a container door so that when fitted to the door it will form a seal with said edge portions to preclude the passage of moisture to the door edges, a second portion having a base for connection to the first portion and at least one resiliently deformable sealing arm upstanding from an edge region of said base for sealing engagement with a portion of the container around the door opening, and a third portion to connect said first and second portions together.
According to a further prospective of the invention in some of its broadest aspects a three part seal construction for a container door, the seal construction comprising a first resiliently deformable part of a predetermined generally channel sectioned shape for application to the edge portions of a con-tainer door so that when fitted to the door it will form a seal with the edge portions to preclude the passage of moisture to the door edges, a second part having a base for connection to the first part and at least one first resiliently deformable sealing ;~ -- .,, .
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~077414 arm upstanding form an edge region of the base for sealing engagement with a portion of the container surface around the door opening, first interengaging means for releasably securing the base of the second part to the first part, and second inter-engaging means comprising a third part separate from the first and second parts for releasably securing the first and second parts together.
Preferably, first and second interengaging means are provided for releasably securing the base of the second portion to the first portion, the second interengaging means including the third portion.
Preferably, the first portion is extruded from a resiliently deformable plastics material and is of generally ~ , ;~ rectangular U-shaped cross-section, the arms of the U being .
;` inwardly directed at their tips to form seals with peripheral "~
edge portions of the front and rear faces of the door.
Preferably, the plastics extrusion is a dual durometer extrusion with said tips being of a softer material than the - remainder of the extrusion. Preferably, at least one of the arms of the U is provided with one or more gripper fins extend-r~ ing inwardly from the inner face of the arm towards the base of the U so as to assist said first portion automatically to grip ., on the container door.
,'`
Preferably, there are a plurality of said gripper fins and these may be of softer material than the remainder of said portion, e.g. of the same soft material as said tips. The outer ... .
face of the base of the U of the first portion may be specially formed for mating engagement with the base of the second portion and in one construction may be cut away with an overhang, so that the overhanging portion overlies part of the base of the second _ 3 _ .
' 1077414 ` :
portion.
Preferably, the second portion is also extruded from a resiliently deformable material. This material is preferably rubber. Preferably, the second portion is also generally of U-shaped cross-section with a second sealing arm providing the second arm of the U, the second arm preferably being shorter than the first arm and more easily deformed than the first arm.
Preferably, the base has a T-sectioned projection on its outer face, part of the crossbar of the T engaging beneath the over-hang on the first portion.
In a preferred construction, the third portion com-prises an extrusion, part of which engages with the first portion and another part of which engages with the second portion ! Pre-ferably, this extrusion is resiliently deformalbe, e.g~ of a plastics material, and of generally U-shaped cross-section with one arm of the U engaging in a groove extending lengthwise of the first portion and a second arm engaging beneath part of the crossbar of the T-shaped projection of the second portion. Pre-ferably, therefore, the second arm is longer than the first arm.
The first arm, or for that matter the second arm, may be provided - with outwardly extending gripper fins on one or both of its faces to improve the grip of the arm with its appropriate seal portion.
It is envisaged that the third portion could be a dual durometer extrusion with at least the gripper fins or some of them formed of a softer material than the remainder of the third portion.
Two preferred embodiments of container door seal are now described by way of example with reference to the accompanying drawings, which are sectional views through the two seals.
Referring to Figure 1, the seal is comprised of a first portion 1, a second portion 3 and a third portion 5. The first 1~3 ., portion 1 is of ge~erally rectangular U-shaped cross-section with a base 7 and an external upstanding arm 9 and an internal upstanding arm 11. The distance between the inner faces of the arms 9 and 11 is predetermined so as to be slightly greater than the average thickness of an edge portion of a container door to which it is to be applied and the arm 11 is arranged to be located against the inside face of the door. The portion 1 is fo~med by a dual durometer plastics extrusion process and the .- , base 7 and main parts of the arms 9 and 11 are formed of resiliently deformable plastics material, whereas the tips 13 and 15 of the two arms are formed of a softer plastics material.
As can be seen, the two arm tips 13 and 15 have their inner edges at least inwardly directed relative to the remainder of the inner edges of the arms so that when the first portion is applied to the edge of a door the tips 13 and 15 will be deformed outwardly and due to the natural resiliency of the material from which they are made, will press inwardly against the two faces of the door so as to form an at least substantially moisture proof seal with said faces so as at least to hinder if not totally prevent passage of moisture to the end face of the door.
On the inner face of the arm 11 a plurality of gripper fins 17 extending inwardly at about 60 towards the base 7 of --the portion are provided, these fins being principally to assist in holding the portion on the edge of the door. It is preferred i that the fins 17 are on the arm 11 only because even when collapsed they will have some bulk thereby holding the arm 11 a short distance from the door face. This could have an un-desirable effect if they were provided on the arm 9, both visually and for sealing purposes.
The base 7 is provided with a channel 19 for mating : , ' ' ' ~077414 ' engagement with the crossbar of a T-sectioned projection 21 on the second seal portion 3 and with an overhang 23 arranged to overlie one arm of the crossbar of the projection 21 when the two parts are assembled together. The projection 21 extends ~:.
from the base 25 of the second portion 3 and upstanding from one edge region of the base 25 is a resiliently deformab~e first ~^ arm 27, both the inner and outer faces of which are generally arcuate and extend in towards the centre line 29 of the seal and merge at a tip 31. Extending upwardly from the other edge region of the base 25 is a second inwardly directed arm 33 which is shorter than the first arm 27 and, being thinner than the arm 27, is more easily deformed. In use, the arm 33 is arranged to be deformed inwardly towards the centre line 29 so as to form a seal with the inwardly directed face of the portion of the con-tainer defining the door opening when the door is closed, whereas the tip 31 of the arm 27 is arranged to deform slightly out-~ wardly and form a seal with the outwardly directed face of the : portion of the container defining the door opening.
It is preferred that the first portion 1 is formed of a plastics material so that the four corners of the seal (for arectangular door) can be mitred and connected together in known i manner, for example with a glue or solvent, whereas it is pre- -~
ferred that the second portion 3 be formed of a rubber material so that the four corners can be mitred if necessary and then ; connected together by means of a moulding operation. The main reason for making the portion 3 of rubber is that the portion -can be made very slightly undersize so that after the portion 1 ; has been fitted to the door the portion 3 can be stretched and applied onto the portion 1 and the natural resiliency of the rubber will then hold the seal tightly on the door.
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: 1077414 It will of course be appreciated that the two portions 1 and 3, due to their generally mating groove 19 and projection 21 will, to a certain extent, remain connected together. How-ever, so as positively to connect the two portions together the third portion 5 is required and this is preferably formed from a plastics generally U-shaped extrusion having a base-35, a first short upstanding arm 37 and a second long upstanding arm 39 :, -.
generally parallel to the arm 37. The arm 37 is arranged to form a tight fit within a groove 41 formed in a corner region of the first seal portion 1 and as shown is provided with a plurality of gripper fins 43 to assist in retaining the arm 37 in the groove 41. If desired, the portion 5 may be a dual duro-meter extrusion, in which case at least some of the fins 43 would preferably be formed of a softer material than the remain-der of the portion. The arm 39 is arranged to overlie the exposed outer face portion 45 of the base 7 and to extend over the other part of the head of the T-shaped projection 21 on the seal portion 3 so as to extend towards the centre line 29 of the seal in the opposite sense to the overhang 23. It will 20 thus be appreciated that the portion 5, due to its arm 37 en-gaging the groove 41, will effectively be locked to the portion 1 and by virtue of its arm 39 and the overhang 23 engaging beneath the edge portions of the head of the projection 21 located in the groove 19, the portion 3 will be positively attached to the portion 1.
By providing a three-part door seal, it is possible to replace t~e container sealing portion, i.e. the third portion 3, very simply whenever this becomes damaged. Since this portion ; provides the outer perimeter of the seal it is most likely to ; 30 become damaged and of course even when it is removed for replace-~.
.
, -- . .
ment, the pcrtion 1 will remain on the door and provide an effective doox seal. In other words, the edge of the door is ; sealed from the elements at all times thus giving the door a considerably longer life than known seals.
Referring to Figure 2, the seal construction is similar to that of Figure 1, and like parts are identified by the same , reference numerals. The tip portion 13 of the arm 11 is, in this construction, formed of the same resiliently deformable ' plastics material as the remainder of the arm, but is connected to the main portion of the arm 11 by means of a portion 150 of softer plastics material. The inner face 14 of the tip 13 is inclined inwardly towards the arm 9 so that the tip can take up any manufacturing tolerances in the edge of the container door - to which the portion 1 is to be attached. Because the external arm 9 is formed of the harder plastics material, it gives a positive precise location on the container door and its inner face is preferably formed with two internal grooves 10 to ac-commodate adhesive by means of which the part 1 is connected to !~, the door edge. For a similar purpose, an internal portion 17 of the inner face of the arm 9 is spaced inwardly of an outer portion 18 of the arm 9 to ensure that there is sufficient space for the adhesive in the event that the part 1 is a very tight fit on the door.
The arm 11 is shown as being hollow. This is not essential and if a greater space between the arms 9 and 11 is required, the arm 11 need not be hollow. It is intended that the tip portion 13 will always be pressed against the inner face of the door with a considerable force due to the resiliency of the portion 150, thus causing the inner face of the arm 9 to bear tight against the outer surface of the door.
.' .
' . ' ' ' ' ~ , ~ ~' It will be appreciated that the second part 3 could be ~ connected to the first part 1 by a third part of a construction ,~ other than that specifically described above and that the various -~`~!` materials from which the parts 1, 3 and 5 are extruded could be different from those specifically described. It is however, important that the parts 1 and 3 are formed of resiliently de-., - formable material.
Further advantages of making the seal portion 3 of rubber, e.g. EPDM, are that it can withstand temperatures of 10 approximately -40C to +60C and it is resilient to UV light.
Also, it can be stretched into place, kinking is eliminated and the sealing properties of the first part 1 are increased once it has been applied to the part 3.
; From the foregoing it will be appreciated that there are considerable advantages in having a three part container door seal.
.
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.
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... . .
.
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Normally, cargo containers have very large doors at one or both ends of the container and these are traditionally made of multi-ply wood, and in order to prevent dust from en-` tering the interior of the container and so as to keep the con-tainer generally airtight and watertight, a seal is normally provided around the periphery of the door (or doors) on the end of the container for engagement with the container around the door opening. This seal, as well as sealing the interior of the container when the door is closed, should also be capable of sealing the edges of the door to which it is applied from the ;~i elements and in particular, capable of preventing moisture from reaching the edges of the door. Needless to say, if water reaches the end faces of the plies making up the door, the door will quickly deteriorate.
Various proposals have been put forward to meet the above requirements and one proposal is to provide a dual duro-meter one-piece H-section seal which does work satisfactorily.
The problem with this seal, however, is that if the portion of the seal for sealing the container, or for that matter the por-tion for sealing the edge of the door, becomes damaged then the whole seal has to be replaced. An alternative proposal has been to provide an extruded flexible container seal portion which can be attached to an extruded metal portion which is fitted to the edge of the door to seal the door. This seal, however, suffers from the disadvantage that the extruded metal portion is rigid ~ and cannot accommodate tolerances in door thickness and unless ; 30 applied with a large amount of some form of mastic or glue it . .
~. ~i~
' . , .
107741~
does not form an entirely watertight seal on the door. Also, - of course, it has to be positively fixed to the door, for ex-` ample with adhesive, nails, screws or the like. Also, metal extrusions are expensive and being rigid are awkward to handle prior to their application to the door edges.
The door seal construction of the present invention has been evolved to meet the above requirements and to overcome the problems which have been experienced with prior proposed seals.
According to the present invention, we provide a three part container door seal construction comprising a first resiliently deformable portion of a predetermined generally channel sectioned shape for application to the edge portions of a container door so that when fitted to the door it will form a seal with said edge portions to preclude the passage of moisture to the door edges, a second portion having a base for connection to the first portion and at least one resiliently deformable sealing arm upstanding from an edge region of said base for sealing engagement with a portion of the container around the door opening, and a third portion to connect said first and second portions together.
According to a further prospective of the invention in some of its broadest aspects a three part seal construction for a container door, the seal construction comprising a first resiliently deformable part of a predetermined generally channel sectioned shape for application to the edge portions of a con-tainer door so that when fitted to the door it will form a seal with the edge portions to preclude the passage of moisture to the door edges, a second part having a base for connection to the first part and at least one first resiliently deformable sealing ;~ -- .,, .
` ``
~077414 arm upstanding form an edge region of the base for sealing engagement with a portion of the container surface around the door opening, first interengaging means for releasably securing the base of the second part to the first part, and second inter-engaging means comprising a third part separate from the first and second parts for releasably securing the first and second parts together.
Preferably, first and second interengaging means are provided for releasably securing the base of the second portion to the first portion, the second interengaging means including the third portion.
Preferably, the first portion is extruded from a resiliently deformable plastics material and is of generally ~ , ;~ rectangular U-shaped cross-section, the arms of the U being .
;` inwardly directed at their tips to form seals with peripheral "~
edge portions of the front and rear faces of the door.
Preferably, the plastics extrusion is a dual durometer extrusion with said tips being of a softer material than the - remainder of the extrusion. Preferably, at least one of the arms of the U is provided with one or more gripper fins extend-r~ ing inwardly from the inner face of the arm towards the base of the U so as to assist said first portion automatically to grip ., on the container door.
,'`
Preferably, there are a plurality of said gripper fins and these may be of softer material than the remainder of said portion, e.g. of the same soft material as said tips. The outer ... .
face of the base of the U of the first portion may be specially formed for mating engagement with the base of the second portion and in one construction may be cut away with an overhang, so that the overhanging portion overlies part of the base of the second _ 3 _ .
' 1077414 ` :
portion.
Preferably, the second portion is also extruded from a resiliently deformable material. This material is preferably rubber. Preferably, the second portion is also generally of U-shaped cross-section with a second sealing arm providing the second arm of the U, the second arm preferably being shorter than the first arm and more easily deformed than the first arm.
Preferably, the base has a T-sectioned projection on its outer face, part of the crossbar of the T engaging beneath the over-hang on the first portion.
In a preferred construction, the third portion com-prises an extrusion, part of which engages with the first portion and another part of which engages with the second portion ! Pre-ferably, this extrusion is resiliently deformalbe, e.g~ of a plastics material, and of generally U-shaped cross-section with one arm of the U engaging in a groove extending lengthwise of the first portion and a second arm engaging beneath part of the crossbar of the T-shaped projection of the second portion. Pre-ferably, therefore, the second arm is longer than the first arm.
The first arm, or for that matter the second arm, may be provided - with outwardly extending gripper fins on one or both of its faces to improve the grip of the arm with its appropriate seal portion.
It is envisaged that the third portion could be a dual durometer extrusion with at least the gripper fins or some of them formed of a softer material than the remainder of the third portion.
Two preferred embodiments of container door seal are now described by way of example with reference to the accompanying drawings, which are sectional views through the two seals.
Referring to Figure 1, the seal is comprised of a first portion 1, a second portion 3 and a third portion 5. The first 1~3 ., portion 1 is of ge~erally rectangular U-shaped cross-section with a base 7 and an external upstanding arm 9 and an internal upstanding arm 11. The distance between the inner faces of the arms 9 and 11 is predetermined so as to be slightly greater than the average thickness of an edge portion of a container door to which it is to be applied and the arm 11 is arranged to be located against the inside face of the door. The portion 1 is fo~med by a dual durometer plastics extrusion process and the .- , base 7 and main parts of the arms 9 and 11 are formed of resiliently deformable plastics material, whereas the tips 13 and 15 of the two arms are formed of a softer plastics material.
As can be seen, the two arm tips 13 and 15 have their inner edges at least inwardly directed relative to the remainder of the inner edges of the arms so that when the first portion is applied to the edge of a door the tips 13 and 15 will be deformed outwardly and due to the natural resiliency of the material from which they are made, will press inwardly against the two faces of the door so as to form an at least substantially moisture proof seal with said faces so as at least to hinder if not totally prevent passage of moisture to the end face of the door.
On the inner face of the arm 11 a plurality of gripper fins 17 extending inwardly at about 60 towards the base 7 of --the portion are provided, these fins being principally to assist in holding the portion on the edge of the door. It is preferred i that the fins 17 are on the arm 11 only because even when collapsed they will have some bulk thereby holding the arm 11 a short distance from the door face. This could have an un-desirable effect if they were provided on the arm 9, both visually and for sealing purposes.
The base 7 is provided with a channel 19 for mating : , ' ' ' ~077414 ' engagement with the crossbar of a T-sectioned projection 21 on the second seal portion 3 and with an overhang 23 arranged to overlie one arm of the crossbar of the projection 21 when the two parts are assembled together. The projection 21 extends ~:.
from the base 25 of the second portion 3 and upstanding from one edge region of the base 25 is a resiliently deformab~e first ~^ arm 27, both the inner and outer faces of which are generally arcuate and extend in towards the centre line 29 of the seal and merge at a tip 31. Extending upwardly from the other edge region of the base 25 is a second inwardly directed arm 33 which is shorter than the first arm 27 and, being thinner than the arm 27, is more easily deformed. In use, the arm 33 is arranged to be deformed inwardly towards the centre line 29 so as to form a seal with the inwardly directed face of the portion of the con-tainer defining the door opening when the door is closed, whereas the tip 31 of the arm 27 is arranged to deform slightly out-~ wardly and form a seal with the outwardly directed face of the : portion of the container defining the door opening.
It is preferred that the first portion 1 is formed of a plastics material so that the four corners of the seal (for arectangular door) can be mitred and connected together in known i manner, for example with a glue or solvent, whereas it is pre- -~
ferred that the second portion 3 be formed of a rubber material so that the four corners can be mitred if necessary and then ; connected together by means of a moulding operation. The main reason for making the portion 3 of rubber is that the portion -can be made very slightly undersize so that after the portion 1 ; has been fitted to the door the portion 3 can be stretched and applied onto the portion 1 and the natural resiliency of the rubber will then hold the seal tightly on the door.
.
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. . - . :
. ~ .
: 1077414 It will of course be appreciated that the two portions 1 and 3, due to their generally mating groove 19 and projection 21 will, to a certain extent, remain connected together. How-ever, so as positively to connect the two portions together the third portion 5 is required and this is preferably formed from a plastics generally U-shaped extrusion having a base-35, a first short upstanding arm 37 and a second long upstanding arm 39 :, -.
generally parallel to the arm 37. The arm 37 is arranged to form a tight fit within a groove 41 formed in a corner region of the first seal portion 1 and as shown is provided with a plurality of gripper fins 43 to assist in retaining the arm 37 in the groove 41. If desired, the portion 5 may be a dual duro-meter extrusion, in which case at least some of the fins 43 would preferably be formed of a softer material than the remain-der of the portion. The arm 39 is arranged to overlie the exposed outer face portion 45 of the base 7 and to extend over the other part of the head of the T-shaped projection 21 on the seal portion 3 so as to extend towards the centre line 29 of the seal in the opposite sense to the overhang 23. It will 20 thus be appreciated that the portion 5, due to its arm 37 en-gaging the groove 41, will effectively be locked to the portion 1 and by virtue of its arm 39 and the overhang 23 engaging beneath the edge portions of the head of the projection 21 located in the groove 19, the portion 3 will be positively attached to the portion 1.
By providing a three-part door seal, it is possible to replace t~e container sealing portion, i.e. the third portion 3, very simply whenever this becomes damaged. Since this portion ; provides the outer perimeter of the seal it is most likely to ; 30 become damaged and of course even when it is removed for replace-~.
.
, -- . .
ment, the pcrtion 1 will remain on the door and provide an effective doox seal. In other words, the edge of the door is ; sealed from the elements at all times thus giving the door a considerably longer life than known seals.
Referring to Figure 2, the seal construction is similar to that of Figure 1, and like parts are identified by the same , reference numerals. The tip portion 13 of the arm 11 is, in this construction, formed of the same resiliently deformable ' plastics material as the remainder of the arm, but is connected to the main portion of the arm 11 by means of a portion 150 of softer plastics material. The inner face 14 of the tip 13 is inclined inwardly towards the arm 9 so that the tip can take up any manufacturing tolerances in the edge of the container door - to which the portion 1 is to be attached. Because the external arm 9 is formed of the harder plastics material, it gives a positive precise location on the container door and its inner face is preferably formed with two internal grooves 10 to ac-commodate adhesive by means of which the part 1 is connected to !~, the door edge. For a similar purpose, an internal portion 17 of the inner face of the arm 9 is spaced inwardly of an outer portion 18 of the arm 9 to ensure that there is sufficient space for the adhesive in the event that the part 1 is a very tight fit on the door.
The arm 11 is shown as being hollow. This is not essential and if a greater space between the arms 9 and 11 is required, the arm 11 need not be hollow. It is intended that the tip portion 13 will always be pressed against the inner face of the door with a considerable force due to the resiliency of the portion 150, thus causing the inner face of the arm 9 to bear tight against the outer surface of the door.
.' .
' . ' ' ' ' ~ , ~ ~' It will be appreciated that the second part 3 could be ~ connected to the first part 1 by a third part of a construction ,~ other than that specifically described above and that the various -~`~!` materials from which the parts 1, 3 and 5 are extruded could be different from those specifically described. It is however, important that the parts 1 and 3 are formed of resiliently de-., - formable material.
Further advantages of making the seal portion 3 of rubber, e.g. EPDM, are that it can withstand temperatures of 10 approximately -40C to +60C and it is resilient to UV light.
Also, it can be stretched into place, kinking is eliminated and the sealing properties of the first part 1 are increased once it has been applied to the part 3.
; From the foregoing it will be appreciated that there are considerable advantages in having a three part container door seal.
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., ~, .
.....
... . .
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Claims (39)
1. A three part container door seal construction comprising a first resiliently deformable portion of a predeter-mined, generally channel sectioned shape for application to the edge portion of a container door so that when fitted to the door it will form a seal with said edge portions to preclude the passage of moisture to the door edges, a second portion having a base for connection to the first portion and at least one resiliently deformable sealing arm upstanding from an edge por-tion of said base for sealing engagement with a portion of the container around the door opening, and a third portion to con-nect said first and second portions together, said structure being such that said third portion is readily removable to allow for replacement of said second portion.
2. A seal construction as claimed in claim 1, wherein first and second interengaging means are provided for releasably securing the base of the second portion to the first portion, the second interengaging means including the third portion.
3. A seal construction as claimed in claim 1, wherein the first portion is extruded from a resiliently deformable plastics material and is of generally rectangular U-shaped cross-section, the arms of the U being inwardly directed at their tips to form seals with peripheral edge portions of the front and rear faces of the door.
4. A seal construction as claimed in claim 3, wherein the plastics extrusion is a dual durometer extrusion with said tips being of a softer material than the remainder of the ex-trusion.
5. A seal construction as claimed in claim 3, wherein at least one of the arms of the U is provided with one or more gripper fins extending inwardly from the inner face of the arm towards the base of the U so as to assist said first portion automatically to grip on the container door.
6. A seal construction as claimed in claim 5, wherein there are a plurality of said gripper fins which are of softer material than the remainder of said portion, e.g. of the same soft material as said tips.
7. A seal construction as claimed in claim 3, wherein the outer face of the base of the U of the first portion is specially formed for mating engagement with the base of the second portion.
8. A seal construction as claimed in claim 7, wherein the outer face of the base of the U of the first portion is cut away with an overhang so that the overhanging portion overlies part of the base of the second portion.
9. A seal construction as claimed in claim 1, wherein the second portion is extruded from a resiliently deformable material.
10. A seal construction as claimed in claim 9, wherein said resiliently deformable material is rubber.
11. A seal construction as claimed in claim 1, wherein the second portion is generally of U-shaped cross-section with a second sealing arm providing the second arm of the U.
12. A seal construction as claimed in claim 11, wherein the second arm is shorter than the first arm and is more easily deformed than the first arm.
13. A seal construction as claimed in claim 11, wherein the base of the second portion has a T-sectioned pro-jection on its outer face, part of the crossbar of the T en-gaging beneath the overhang on the first portion.
14. A seal construction as claimed in claim 13, wherein the third portion comprises an extrusion, part of which engages with the first portion and another part of which engages with the second portion.
15. A seal construction as claimed in claim 14, wherein the extrusion is resiliently deformable, e.g. of plastics material and is generally of U-shaped cross-section with one arm of the U engaging in a groove extending lengthwise of the first portion and a second arm engaging beneath part of the crossbar of the T-shaped projection of the second portion.
16. A seal construction as claimed in claim 15, wherein the second arm is longer than the first arm.
17. A seal construction as claimed in claim 15, wherein the first or second arm is provided with outwardly ex-tending gripper fins on one or both of its faces to improve the grip of the arm with its appropriate seal portion.
18. A seal construction as claimed in claim 17, wherein the third portion is a dual durometer extrusion with at least the gripper fins or some of them being formed of a softer material than the remainder of the third portion.
19. A door for a cargo container, said door having a seal construction located around its periperhy comprising a first resiliently deformable portion of a predetermined, generally channel sectioned shape for application to the edge portion of a container door so that when fitted to the door it will form a seal with said edge portions to preclude the passage of moisture to the door edges, a second portion having a base for connection to the first portion and at least one resiliently deformable sealing arm upstanding from an edge portion of said base for sealing engagement with a portion of the container around the door opening, and a third portion to connect said first and second portions together, said structure being such that said third portion is readily removable to allow for replacement of said second portion.
20. A three part seal construction for a container door, said seal construction comprising a first resiliently de-formable part of a predetermined generally channel sectioned shape for application to the edge portions of a container door so that when fitted to the door it will form a seal with said edge portions to preclude the passage of moisture to the door edges, a second part having a base for connection to the first part and at least one first resiliently deformable sealing arm upstanding from an edge region of said base for sealing engage-ment with a portion of the container surface around the door opening, first interengaging means for releasably securing said base of said second part to said first part, and second inter-engaging means comprising a third part separate from said first and second parts for releasably securing said first and second parts together.
21. A seal construction as claimed in claim 20, wherein said first part is extruded from a resiliently deformable plastics material and has a base and a pair of arms extending therefrom giving said first part a generally rectangular U-shaped cross-section, and including inwardly directed tips on said arms of said first part to form seals with peripheral edge portions of the front and rear faces of said door.
22. A seal construction as claimed in claim 21, wherein said plastics extrusion is a dual durometer extrusion with said tips being of a softer material than the remainder of said extrusion.
23. A seal construction as claimed in claim 21, wherein at least one gripper fin is provided on at least one of said arms of said U-shaped first part, said at least one fin extending inwardly from the inner face of said at least one arm towards said base of said U-shaped first part so as to assist said first part automatically to grip on the container door.
24. A seal construction as claimed in claim 23, wherein there are a plurality of said gripper fins on said at least one arm, which fins are of softer material than the re-mainder of said first part.
25. A seal construction as claimed in claim 24, wherein said fins are formed of the same soft material as said tips.
26. A seal construction as claimed in claim 20, in-cluding means provided on the outer face of said base of said channel sectioned first part for mating engagement with said base of said second part.
27. A seal construction as claimed in claim 20, wherein an outer face of said channel sectioned first part is cut away to form an overhang portion overlying a portion of said base of said second part.
28. A seal construction as claimed in claim 20, wherein said second part is extruded from a resiliently de-formable material.
29. A seal construction as claimed in claim 28, wherein said resiliently deformable material is rubber.
30. A seal construction as claimed in claim 20, wherein said second part includes a second sealing arm spaced from said first sealing arm to give said second part a generally U-shaped cross-section.
31. A seal construction as claimed in claim 30, wherein said second sealing arm is shorter than said first sealing arm and is more easily deformed than said first sealing arm.
32. A seal construction as claimed in claim 27, wherein a T-sectioned projection is provided on the outer face of said base of said second part, and said portion of said base of said second part comprises the crossbar of said T-sectioned projection engaging beneath said overhang portion on said first part.
33. A seal construction as claimed in claim 20, wherein said third part comprises an extrusion, said third part having a first portion which engages with said first part of said seal construction and a second portion which engages with said second part of said seal construction.
34. A seal construction as claimed in claim 20, wherein said second part of said seal construction has a T-shaped projection and said third part is resiliently deformable and is of generally U-shaped cross-section with a first arm of said U-shaped third part engaging in a groove extending length-wise of said first part of said seal construction and a second arm of said U-shaped third part engaging beneath a portion of the crossbar of said T-shaped projection.
35. A seal construction as claimed in claim 34, wherein said second arm of said third part is longer than said first arm of said third part.
36. A seal construction as claimed in claim 34, wherein outwardly extending gripper fins are provided on said first arm of said third part on at least one of its faces to improve the grip of said first arm with said first part.
37. A seal construction as claimed in claim 36, wherein said third part is a dual durometer extrusion with at least some of said gripper fins being formed of a softer material than the remainder of said third part.
38. A seal construction as claimed in claim 34, wherein said generally channel shaped first part has two arms, and a tip portion of at least one of said arms is connected to the remainder of said one arm by a portion formed of a softer material than the remainder of said one arm.
39. A seal construction as claimed in claim 38, wherein said tip portion has an inner surface which is inclined inwardly towards the opposite arm of said first part so that said tip portion can take up manufacturing tolerances.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB19990/77A GB1578653A (en) | 1977-05-12 | 1977-05-12 | Container door seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1077414A true CA1077414A (en) | 1980-05-13 |
Family
ID=10138499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA279,023A Expired CA1077414A (en) | 1977-05-12 | 1977-05-24 | Container door seal |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS53141782A (en) |
| BE (1) | BE855767A (en) |
| BR (1) | BR7703821A (en) |
| CA (1) | CA1077414A (en) |
| DE (1) | DE2724889A1 (en) |
| GB (1) | GB1578653A (en) |
| IN (1) | IN147670B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5487918U (en) * | 1977-11-30 | 1979-06-21 | ||
| JPS54160427U (en) * | 1978-04-26 | 1979-11-09 | ||
| CH641242A5 (en) * | 1980-12-19 | 1984-02-15 | Paul Borel | Sealing strip doors and windows. |
| FR2510704A1 (en) * | 1981-07-31 | 1983-02-04 | Batimetal Sa | Sealing trim between expanding fixed and moving frames - has continuous contact sealing lips on elastic trim strip |
| FR2529938A1 (en) * | 1982-06-16 | 1984-01-13 | Fruehauf France | Door or panel equipped with a sealing joint |
| GB2130277A (en) * | 1982-11-18 | 1984-05-31 | Cmc Bodies Limited | Seals |
| CN109281596B (en) * | 2018-09-03 | 2019-08-09 | 广东江顺新材料科技股份有限公司 | A kind of PVC gasket and preparation method thereof with resistance to shift function |
| CN112208961B (en) * | 2019-07-10 | 2022-08-26 | 中集安瑞环科技股份有限公司 | Tank container and frame thereof |
| CN112591283B (en) * | 2021-01-15 | 2022-07-05 | 深圳核子华曦医学检验实验室 | Rollover prevention stable kit transportation system based on wireless signal transmission |
-
1977
- 1977-05-12 GB GB19990/77A patent/GB1578653A/en not_active Expired
- 1977-05-24 IN IN772/CAL/77A patent/IN147670B/en unknown
- 1977-05-24 CA CA279,023A patent/CA1077414A/en not_active Expired
- 1977-06-02 DE DE19772724889 patent/DE2724889A1/en not_active Withdrawn
- 1977-06-08 JP JP6680877A patent/JPS53141782A/en active Granted
- 1977-06-13 BR BR7703821A patent/BR7703821A/en unknown
- 1977-06-16 BE BE178511A patent/BE855767A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JPS53141782A (en) | 1978-12-09 |
| BR7703821A (en) | 1979-01-02 |
| JPS563274B2 (en) | 1981-01-23 |
| IN147670B (en) | 1980-05-24 |
| GB1578653A (en) | 1980-11-05 |
| DE2724889A1 (en) | 1978-11-23 |
| BE855767A (en) | 1977-12-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |