JPS6231660A - Variable-length tape-tab forming device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a tape feeding device, and in particular,
The present invention relates to a tape tab forming device that forms a tape tab at the starting end of a piece of tape to be supplied.

(Prior Art and its Problems) Tape tab forming devices are known. For example, )1,
U.S. Patent No. 2.300.42 proposed by Holben
No. 3 shows a tape roll holder in which locking means driven by an arm are provided to store the tape in the normal state. By pushing the arm downward,
The locking means moves back towards the tear where the tape tab is formed by the loop of tape. A stop screw under the arm is adjusted to vary the spacing and associated tab length.

U.S. Patent No. 2.526.4 proposed by G. McNeil
In No. 94, a spring arm within the tape roll holder moves back and forth to form a tape tab.

U.S. Patent No. 3.204 proposed by H. Kieslich.
, 949 discloses a set of cam driven rollers for forming tape tabs within a tape feeder.

West German Patent Specification No. 2 and 23 proposed by Malca1m
No. 2,663 describes a spring-loaded cutter that operates to push the tape away from the tape locating surface to form a tab with the tape.

Such prior art demonstrates the utility of tape tabs in combination with tape tab holders. Many conventional devices rely on metal springs or mechanisms to preclude the use of molded tape tab forming devices.
The bias effect of the forming means is utilized. Most conventional devices typically have a single presettable tab length.

(Object of the Invention) The object of the present invention is to have a simple and low-cost structure, which can be implemented by molding, and which has a variable length that can be preset to sequentially change the tape tab length by a fixed amount. An object of the present invention is to provide a tape tab forming device.

Another object of the present invention is to provide a variable length tape tab forming device that can be easily attached to or molded into commercially available tape unwinding equipment.

PRINCIPLE OF THE INVENTION It is an object of the present invention to combine the above objects with means for progressively increasing the distance between upwardly divergent struts by increasing the diameter of the cylindrical springs hingedly supporting the struts. This is accomplished with a molded tape tab forming device. The device allows rapid changes from one preset tab length to at least two other lengths in sequence without the use of auxiliary tools. The tab-forming device is characterized by a pair of upwardly extending forward and rearward struts having upper ends terminated in wings. The lower ends of the struts are hingedly supported by cylindrical molded flexible springs that limit the outward spread of the upper ends of the struts. A cylindrical spring is combined with means for realizing a variable length tab. A pawl is provided on the inner wall of the cylindrical spring to engage one of the three pawl engaging portions in the inserted ratchet spool, thereby increasing the diameter of the cylindrical spring and increasing the diameter of the strut. It allows for outward expansion.

The wings form a support in the tape payout path so that the tape strips are supported at two locations and are brought together to form a tab near the wings due to the tape's own tackiness. At this time, the struts are pressed together to the closed position, and the wings abut against each other. By changing the pawl engagement location within the ratchet spool, the strut spacing can be made wider or narrower to create three tab sizes. The rear strut can be formed with downwardly extending legs and feet to engage a catch in a current plastic tape roll holder. Typically, such fasteners support metal hooks for tearing the tape. Alternatively, the tape tear hook can be connected to the forward strut and extend beyond the tip of the forward wing and have a cantilevered forward serration for tearing tape within the tape path. Can be done.

The body of the tab-forming device is molded from acetal plastic and has the ability to hold the struts together and thereby recover its molded shape after stretching, such as when stretching a cylindrical spring. The cutting blade may be molded in different plastics, such as acrylic to create a sharp blade, and the locking feature
It is located at the tip of the front strut to prevent separation between the two dissimilar plastic materials used in the body and cutting blade.

The tape tab forming device can be molded and housed within existing plastic tape dispensing equipment and is particularly applicable to the widely used split configuration. The tape tab forming device can also be combined with other roll holders since it can be easily connected to a tape tearer. It can also be molded integrally with the roll holder.

(Structure and operation of the invention) The present invention will be explained in detail below with reference to the drawings.

One embodiment of the tape unwinding device of the present invention with an integrated tape tab former may be formed from two main parts, as shown in FIG. The first main part is a roll holder 16 that supports the tape roll 13. This roll 1
3, on the other hand, includes pressure sensitive tape with adhesive applied to it. The terminal span 15 of the tape is guided in a tape path to an upwardly extending tape support 17.

Referring to FIGS. 1 and 2, the second main part of the embodiment of the present invention is a tape tab forming device 19 connected to an upwardly extending tape support 17. In the embodiment of the tape unwinding apparatus shown in FIG.
7 front struts 23. The lower ends of these struts are fitted with cylindrical molded flexible springs 2
7 and are connected so that they can be opened. Strut 2
The upper end of 1 terminates in a wing 33 which, in cooperation with the wing 31 on the tape support 17, serves to support the tape section to form a tape tab 35. The spring 27 connects the upper end of the strut 2 to the wing 3 on the tape support 17.
It is held at a position slightly apart from 1. As shown in the embodiment of FIG. 1, the spring 27 is located within a curved recess 28 in the bottom of the tape support 17. The ratchet spool 41 in this embodiment has an end button 49.
．． 50 and is housed within the spring 27. The operation of this ratchet spool 41 is explained in Figs.
This will be explained with reference to the figures.

The operation of the tape tab forming device 19 is indicated in FIG. 1 by the dotted line 12, which indicates the closed position of the struts 21-23. In operation, strut 21 is pushed backwards along the direction indicated by arrow A to the position indicated by dotted line 12, and finally ends up in tape tab 3.
5 are formed by the operating wings 31, 33 in such a manner that the wings are brought into contact with each other or in a relation that approximates such a state. This tape tab 35 is captured by the presenter and the tape is pushed forward and torn at the desired length.

FIG. 2 shows the spring mechanism. The cylindrical spring 27 has a slot 29 opened in the longitudinal direction. The front end of the slot 29 engages the bottom of the front strut 21 . A vertical place 30 is provided in the center of the strut 21 to provide additional strength during movement of the strut 21. The rear end of the slot 29 engages the bottom of the strut 23. In this implementation, means are provided for varying the tab length. A pawl 37 extends downward from the rear end of the slot 29. A semi-cylindrical guide bar 39 is provided along the entire length of the cylindrical spring 27. Guide bar 39 and pawl 37 are separated by an angle of 60 to 75 degrees. As shown in FIG. 2, the ratchet spool 41 has three pawl engaging portions 43.
It has a cylindrical body 42 that includes an angle of 45°47. The pawl engaging portions 43, 45, 47 have a step shape that gradually increases in depth. Although three pawl engaging portions are used in this embodiment, more pawl engaging portions with different depths may be provided to provide more than two different tab lengths. The cylindrical body 42 of the ratchet spool 41 has a diameter that matches the inner wall of the cylindrical spring 27. The ratchet spool 41 is provided with a larger diameter push button 49 and a smaller diameter push button 50 at the front and rear, the two push buttons 49, 50 having a diameter larger than the diameter of the spring 27. This prevents the spool 41 from coming off the cylindrical spring 27. As shown in FIG. 1, a semi-cylindrical guide slot 51 is provided in the longitudinal direction of the cylinder 42 to lock the guide bar 39 onto the spring 27. As shown in FIG. 3, a small button 4 is provided at the end of the cylindrical body 42.
8 fits into the hole 44 of the push button 50 and locks the cylindrical body 42 to the spring 27. As explained below, in the embodiment of FIG. 2, a tape tear stop 78 is molded onto a locking device 65 having two retention notches 67, 69. A serrated cutting blade 79 is formed at the forwardly extending end of the wing 33.

The tab forming device 19 can be used to form a length of tab by pre-spaced struts 21,23 on a slotted cylinder without the addition of ratchet spools 41 and pawls 37. However, in the illustrated embodiment, the interaction between the ratchet spool 41 and the cylindrical spring 27 causes the pawl 37 to move into any one of the three pawl engaging portions 43, 45, 47 of different depths. This makes it possible to form tabs of three different lengths.

The tab-forming device 19 is made of synthetic resin molding and is formed with two struts 21, 23 biased into a normally open position. The tab 35 is formed when the two struts 1-21, 23 are pressed against each other. Due to the nature of the plastic material used, when the pressing force is removed from the strut 21, the strut 21,23 returns to its normal open condition. By means of the ratchet sprue 1-41, this normal open condition can be expanded slightly as shown in FIGS. 3-8.

As shown in FIG. 4, which is a cross-sectional view taken along line 4--4 in FIG.
51 has a complementary semicircular shape.

By making the guide bar 39 and the slot 51 semicircular,
When the pawl 37 is moved from one position to another, it allows for slight movement of both. Guide bar 39 prevents twisting of ratchet spool 41 within spring 27.

As shown in FIG. 5 and the cross-sectional view of FIG. The area of the spring 27 between the bars 39 is deformed and the spring 27 is pushed off the spool 41 at the point 46, so that the diameter of the cylindrical spring 27 increases by the distance 40 between the arrows and between the two struts 21, 23. The arc expands.

The pressing force of the pawl 37 against the pawl engagement portions 43, 45, 47 also forces the spool 41 against the guide bar 39, and the spring 27 is forced outward at that point.
The diameter of spring 27 widens in the area between point 54 where spring 27 joins front strut 21 and guide bar 39, and also widens in the arc between struts 21 and 23.

As shown in the cross-sectional views of FIGS. 7 and 8, the pawl engaging portion 43
By engaging the pawls 37 inward, the diameter of the cylindrical spring 27 and the distance between the two struts 21.23 increase again. This forced expansion of the diameter of the cylindrical spring 27 allows for example 3/16 inch.

Three different tab lengths are available: 1/4 inch, 5/16 inch. Spring 27 with larger pawl 37 and deeper pawl engagement portion 43, 45, 47
By using this, it is possible to obtain a tab 35 with even larger dimensions. The pawl engaging portions 43, 45, 47 have ratchet angles of 45° and 15°, respectively, corresponding to the rising portion and step portion in the step shape of the pawl engaging portion. Claw 3
The bottom of 7 has an angle of approximately 15°, and each pawl engaging portion (43
, 45, 47), a matching angle of 15° is formed to ensure stable fitting at the bottom or step.

The front end or rise of the pawl engaging portion 43, 45, 47 and the front part of the pawl 37 have an alignment angle of 45° to facilitate the transition from the -stop position to the other stop position. Place the larger pushbutton 49 at the end of the ratchet spool 41 facing the pawl 37 at 45°, and the smaller pushbutton 50 at the end of the ratchet spool 41 facing the 15° bevel of the pawl 37. It can be seen that pressing from the large pushbutton 49 increases the diameter of the cylindrical spring 27, thereby increasing the tab length. On the other hand, if the push button 50 with the smaller diameter is pressed, the spring 27
diameter is reduced and the tab length is also reduced.

In the example, the front strut 2 of the tab forming device 19
1 has a molded synthetic resin tearing blade as described with reference to FIGS. 1 and 2. The body of the tape tab forming device 19 is formed from a synthetic resin material that has a spring-like quality, is resistant to elastic fatigue, and has sufficient stiffness to have a low tendency to crack under stress. has been done. A class of polymeric materials known as acetals are suitable for purposes of the present invention. Acetal plastic strut 2
1.23 together and has the ability to recover to its molded shape after stretching, such as when stretching the cylindrical spring 27. Within the general class of Acecool, the following materials are particularly suitable: Delrin, manufactured by DuPont Chemicals, and Cercon, manufactured by Cellars Chemicals. This type of synthetic resin has the potential to cause the moving part to contract to its smallest setting.

This potential is created when the part is molded into its smallest shape.

Because of this potential and resistance to cracking, acetal plastics are not suitable for tape cutting blades. Acrylic or polystyrene polymers are suitable for the cutting blade. To bring these two dissimilar materials together, a locking device 65 as shown in FIG.
molds acetal synthetic resin onto the upper end of the front strut 21 while molding the body of the tab forming device 19. This locking device 65 has two notches 67 and 69, one each. Molding the acrylic top containing the cutting blade 79 onto the acetal composite locking device 65 creates a retentive interconnection that prevents dissimilar composite sliding or separation.

The tape tear section may be molded as shown in FIG. 2 or formed in two parts as shown in FIG. 10. In the case of Figure 10, the second part is a metal hook 57, and the remaining parts are molded with polymeric material. As an appendage to the metal hook 57 shown in FIG. 10, the handle 59 of the hook extends downwardly and is retained within a slotted back tongue 71 connected to the strut 21 at region 73 as shown in FIG. ing. The front serrations 75 of the hook 57 are used for tearing the tape.

As shown in FIG. 9, the tape tab forming device is molded as a separate unit 25 and manufactured by Minnesota Mining and Manufacturing Co.
It may also be used with known tape roll holders such as those made by Poration. Roll holders and retainers of this type are known and are particularly popular because of their low cost and convenience. Although the invention is shown as being used with such a roll holder, its use is not limited and may be used with other roll holders. This type of tape roll holder is equipped with a catch 52, 53 for the purpose of holding a metal hook with serrated edges for tearing off the tape. The hook 57 normally passes under the apex 55 of the tape tear section. As an accessory to the tab-forming device I9, the rear strut is modified. The upper part of the strut 22 forms an upwardly sloping wing 32;
The wing 32 is connected to a downwardly extending leg 61 and a curved foot 63, as clearly shown in FIG. In a variation of the invention where the tab forming device 19 is separate from the existing tape holder, the metal hook 57 is removed from the existing tape holder and the legs 61 and foot 63 are shown in FIG. Retainer 52.
53.

The legs 61 and foot 63 are attached to the tape roll holder retainer 5 as an accessory to the tape tab forming device 19.
2.53 are supported oppositely. The operation of tab forming device 19 is similar to that shown in FIG. When strut 21 is pushed in the direction indicated by arrow A, strut 21.22 and wing 32.33 abut wing-to-wing in the closed position, and the tabs are pressed together as shown by dotted lines 14.35. formed in the tape. Ratchet spool 41 can be moved back and forth to engage pawl 37 in one of three pawl engagement portions to create different tab lengths.

The rear struts 22 are molded as curved legs, as shown in FIG. 10, to match the external curve of the upwardly extending tape support stop 17 of existing tape roll holders.

The metal tearing bar 57 moves to the tip of the front strut 21. Handle 59 is connected to the back of strut 21 as shown in FIGS. 10 and 11.

It is held within the slot rear tongue 71.

The front serrations 75 are used to tear the tape.

This variation includes a molded acrylic cutting blade as previously described in connection with the molded integral roll holder and tab forming device of FIGS. 1 and 2. Good too.

The tape tab forming device 19 may therefore be molded with the tape roll holder, as shown in FIG. 1, or separated as an accessory to an existing tape holder, as shown in FIG. It may be formed into a unit. The tape tearing blades 75, 79 may be formed of metal, as shown in FIG. 10, or may be molded into the locking device, as shown in FIG. By movement of the ratchet spool 41, the diameter of the spring 27 is adjusted and the tab length can be preset to be different during use of the device.

Other examples can be described using FIGS. 12, 13, and 14.
1 and explain.

This embodiment consists of a main body 16 and a cutter 19a. A strut 22 on the rear side of the cutter 19a is inserted into a housing 22a of the main body 16, and a spring 27 of the cutter 19a and a front strut 2 are inserted from the bottom of the housing 22a.
1 is sticking out. This embodiment is constructed to form a single fixed tab length L0 and is made of a non-engineering plastic such as polystyrene.

When the struts 21, 22 are closed, the cylindrical spring 2
Stress is generated in 7, but the stress and curvature are concentrated in about the central 1/3 of the cylinder, so the use of non-engineering plastics such as polystyrene is generally not allowed in this part.

However, in this embodiment, the inner and outer walls of the cylindrical spring 27 have a common center in one direction only, but in the other direction, one center is higher than the other. This results in
The wall thickness is thick as dl at the center (thin as d2 at both ends.Thus, when the cylindrical spring 27 is stressed and curved, first divide the stress and curve at both ends, Furthermore, it acts to average it over the entire wall surface.
(') (127M 'jy 'i'Jta h"6・
1. The tape cutter 19a is made of a flat metal plate and is formed with a rectangular hole in the center. The two tongues 71a, 71b move independently when operating force is applied to the cutter 19a, and the rectangular holes accommodate this. After the cutter 19a passes the highest point, the tongue 71a,
71b recovers to the starting position, and at that position cutter 19a
is locked.

Other embodiments are shown in FIGS. 15, 16, 17 and 1.
This will be explained using Figure 8.

This embodiment consists of a main body 16 and a cutter 19a. A strut 22 on the rear side of the cutter 19a is inserted into a housing 22a of the main body 16, and a spring 27 of the cutter 19a and a front strut 2 are inserted from the bottom of the housing 22a.
1 is sticking out. This embodiment is configurable in three tab lengths and is made of an engineering plastic such as acetal, with the cutting blade being metal.

When the struts 21, 22 are closed, the cylindrical spring 2
Stress is generated in 7, but the stress and curvature are concentrated in about 1/3 of the center of the cylindrical body.

The inner and outer walls of the cylindrical spring 27 have a common center in one direction only, but in the other direction one center is higher than the other. As a result, the wall thickness becomes thicker as dl at the center and thinner as d2 at both ends.

When the cylindrical spring 27 is stressed and curved, it first divides the stress and curve at both ends, and then acts to average it over the entire wall surface. However, when forming the longest tabs, a large amount of curvature occurs. Therefore, materials such as Acecool are used.

The force required to close the struts 21 and 22 is the pawl 37.
is separated from the force required to move from one engagement to the next.

The force required to move the pawl 37 is reduced by the thinner cylindrical wall.

The housing 22a has a slope 3 that operates as a slider.
There are 2. In the thin portion, the pawl 37 is connected to the pawl engaging portions 43, 4.
There is a slight stretch when transitioning from one 5.47 to the next. Thereafter, the guide bar has a cylindrical spring 27
is pressed against the slope 32 and locked, and the cylindrical spring 2
Stabilize 7 in that position.

The tape cutter 19a is formed using a flat metal plate with a rectangular hole in the center. two tongues 7
1a and 71b move independently when an operating force is applied to the cutter 19a, and the rectangular hole accommodates this movement. Cutter 1
After 9a passes the highest point, the tongues 71a and 71 return to their initial positions, and the cutter 19a locks at that position.

Furthermore, another embodiment will be described using FIG. 19 and FIG. 20.

This embodiment consists of a main body 16 and a cutter 19a, and the portion corresponding to the strut 22 on the back side of the cutter 19a is molded together with the housing of the main body 16, thereby integrating the tab forming device and the housing. This embodiment is constructed to form a single fixed tab length and is constructed from a non-engineering plastic such as polystyrene.

When the struts 21, 22 are closed, the cylindrical spring 2
Stress is generated in 7, but the stress and curvature are concentrated in about the central 1/3 of the cylinder, so the use of non-engineering plastics such as polystyrene is generally not allowed in this part.

However, in this embodiment, the inner and outer walls of the cylindrical spring 27 have a common center in one direction only, but in the other direction, one center is higher than the other. This results in
The wall thickness is thick as d at the center and thin as d2 at both ends. As a result, when the cylindrical spring 27 is stressed and curved, the stress and curve are first divided at both ends, and then the polystyrene is used to try to average it over the entire wall surface. is also possible.

Next, an embodiment of the present invention using a two-stage spring will be described with reference to FIG. 21.

When the tab forming device and adhesive tape cutter are integrated, a certain hardness of the material is required, and polystyrene is a preferred non-engineering plastic with significantly lower cost. However, the disadvantage of this hardness is that it limits elongation. When the trigger handle 80 is closed, the design amount is preferably 40% of the material deflection (point of break).

The creation of a two-step action spring will be explained.

The strain that occurs when the trigger handle 80 is closed is
It is divided into two parts.

Since a cylindrical spring with a diameter of 20 mm and a wall thickness of 3 mm on the first stage of the ball cannot have a cylindrical gap d of 1.2 fi or more, the strut spacing d4 is about 8 fi. This is too small to capture the tab.

Therefore, after closing the cylindrical gap d3 of 1.2 mm, the cutter beam 82 begins to bend. The length of beam 82 is approximately 60% of the cylinder wall. This would theoretically increase the strut spacing by 13 millimeters;
In reality, more than that is needed.

This gives you flexibility in your design and allows you to use small cylinder diameters with smaller spacing to create something that looks stiff.
You can change the material. If the attachment point 81 of the trigger handle 80 to the beam 82 is lowered, the appearance will be improved with the same operational feel. The inner and outer walls of the cylinder may be parallel to each other or may be staggered. The inner and outer surfaces of beam 82 may be parallel or tapered.

By the same reasoning, low material costs, durability and design flexibility are required for tab forming devices with metal cutters. A new method of operating the cutter (a tongue that is temporarily depressed when the cutter is in a forced operation condition) can be used as part of the present invention. A second way to do this is to drill two round holes instead of a rectangular hole. In this case, two round tapered knobs are provided correspondingly, and the central part is provided with splits in four directions. If the round hole of the cutter is not possible, you can use four divisions for the time being.

(Effects of the Invention) As described in detail above, the present invention is a tab forming device for an adhesive tape dispensing device, in which a ratchet is mounted within a flexible spring to increase the spacing between two diverging tab forming struts.・Variable length tabs can be obtained by combining the spool and pawl. The device can be attached to a commercially available tape roll dispenser or can be molded into an integral part of the dispenser.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view of a tape supply device having a tape tab forming device according to an embodiment of the present invention; FIG. 2 is a partially enlarged perspective front view of the tape tab forming device of FIG. 1; Figure 3, Figure 5 and Figure 7 are Figures 1 and 2.
FIGS. 4, 6, and 8 are partially cutaway front views of the ratchet frame and spring hinge of the tape tab forming device of No. 1, line 4-4 of FIGS. 3, 5, and 7. 6-6 and 8-8, respectively, FIG. 9 is a side view of another embodiment of the present invention, and FIG.
FIG. 11 is a partially enlarged perspective view of the front side of the tape tab forming device shown in FIG.
) (b) (e) (d) is a front view with the lid removed showing another embodiment of the present invention, a left side view, a right side view, and a plan view; Figure 13 (a) (bl (C) 12 is an enlarged front view showing the cutter portion of the embodiment shown in FIG. 12, an enlarged view of the part (B) in FIG. 15(a), 15(b), and 15(C) are front views with the lid removed showing other embodiments of the present invention, left side views, and Plan view, Figures 16(a) and (b) (C1 is a partially enlarged view of the cutter portion of the embodiment shown in Figure 15, a right side view in the case of an intermediate tab length, and a right side view in the case of the maximum tab length) , FIG. 17(b)(C)(d) is an enlarged front view showing the cutter part of the embodiment of FIG. 15, and FIG.
), an enlarged view of the tip of the cutter, and an enlarged side view of the pawl and pawl engaging portion. FIG. 18 is a front view of the main body of the embodiment shown in FIG. Figures 19 (al (b), (C), and d) further illustrate an embodiment of the present invention, with the lid removed, a front view, a left side view, a right side view, and a plan view, and Figure 20 shows the implementation of Figure 19. FIG. 21 is an enlarged front view showing a cutter part used in another embodiment of the present invention. 13...Tape roll, 15... End span, 1
6... Roll holder, 17... Tape support part, 1
9... Tape tab forming device, 19a... Cutter, 21... Front strut, 22... Rear strut, 23... Front strut, 25...
Separation unit, 27... Spring, 28...
Recessed portion, 29... Slot, 30... Vertical place, 31.33... Wing, 32... Slope, 35... Tape tab, 37... Pawl, 39
... Guide bar, 41 ... Ratchet spool, 42 ... Cylindrical body, 44 ... Hole, 43, 45
．． 47... Pawl engaging portion, 48... Button, 49
, 50... End push button, 51... Guide slot, 52.53... Retainer, 55... Vertex,
57...Metal hook, 59...Handle, 61...
・Leg (leg), 63... Foot (leg), 65...
・Lock device, 67, 69...notchi, 71
...Slot back tongue, 71a, 71b...Tang, 73...Area, 75...Serrated blade, 7th...
- Tape tearing stop part, 79... Serrated cutting blade, 80... Trigger handle, 81... Attachment point, 82... Beam.

Claims (19)

[Claims] (1) A flexible spring consisting of a) a cylindrical body with an upwardly extending front strut and a rear strut having a lower end and an upper end, and b) a transverse slot having a front edge and a rear edge; The front strut and the rear strut are coupled to the front and rear edges of the slot, respectively, the struts being biased by the spring to diverge upwardly at their upper ends into a spaced apart open position; The upper ends of each of the struts terminate in a wing, the wing of the front strut having a tearaway portion extending forward, so that when the front strut is pushed against the rear strut, the two wings the flexible spring in an abutting position, thereby in a closed position, the wings forming a tape tab by movement of the struts between the open position and the closed position; c) the length of the tape tab when the front strut is moved between the open and closed positions by varying the diameter of the cylinder and the spacing between the struts in the open position; and d) detent means for rigidly coupling the tape supply device to said rear strut.・Tab forming device. (2) the device is molded of acetal plastic and has a notch spaced from the upper end of the forward strut; the upper end and notch are surrounded by a tearaway section of rigid polymer molding; A device according to claim 1, characterized in that: (3) the upper end of the front strut defines a slot with at least one integrated tongue on one side between the struts, and further removably engages the tongue within the slot; characterized by comprising an inverted hook-shaped member having a first portion and a second portion extending forward beyond the upper end of the front strut and having a serrated front blade serving as a tape cutting blade. A device according to claim 1. (4) adjustment means for changing the diameter of the cylinder includes a pawl extending from the rear edge of the slot on the cylinder parallel to and toward the central axis of the cylinder; a ratchet spool insertable into a ratchet spool having a circular wall portion having an open circular end and a pawl engaging portion having an increasing depth parallel to the slot within the wall portion for insertion of the pawl; A device according to claim 1, characterized in that it comprises: (5) The cylindrical body has a guide bar disposed laterally in parallel with the slot, and the ratchet
5. Device according to claim 4, characterized in that the spool has a guide slot arranged laterally in the wall of the spool aligned with the guide bar. (6) The device according to claim 5, wherein the guide bar and the guide slot have complementary curved surfaces. 7. The device of claim 4, wherein the ratchet spool has a push button at each end having a diameter greater than the diameter of the cylinder. (8) The device according to claim 4, wherein the pawl engaging portions are inclined with respect to the horizontal, and each pawl engaging portion is V-shaped having a rising angle and a step angle. (9) The device according to claim 4, wherein the pawl engaging portion forms a stepped portion of increasing depth, and the stepped portion rises at an inclination with respect to the horizontal. (10) The device of claim 8, wherein the pawl has a tapered front end and a lower end to match the rise angle and step angle of the pawl engaging portion. (11) a) a tape roll holder having a tape support extending forwardly and upwardly having a top end and a bottom end; b) an upwardly extending forward strut having a bottom end and a top end; and c) a leading edge. and a flexible spring comprising a cylindrical body with a transverse slot having a trailing edge, the tape support and the lower end of the strut being coupled to the trailing edge and the leading edge of the slot, respectively, and the strut are biased by the spring into a spaced open position that flares upwardly from the upper end of the tape support, and the upper ends of the tape support and each strut terminate in a wing, and The wings have a tear-off portion extending forward, and when the front strut is pressed against the tape support, the two wings are brought into a butt position, which results in a closed position, and the wings are in a closed position. d) said flexible spring adapted to form a tape tab by said strut moving between said open position and said closed position; and d) changing the diameter of said cylindrical body in said open position. adjustment means for varying the length of the tape tab when the front strut is moved between the open position and the closed position by varying the spacing between the strut and the tape support; Polymer molded variable length tape tab forming device attached to a tape roll feeder. (12) the device is molded of acetal plastic and has a notch spaced from the upper end of the forward strut; the upper end and notch are surrounded by a tearaway section of rigid polymer molding; 12. A device according to claim 11, characterized in that: (13) The upper end of the front strut defines a slot with at least one integrated tongue on one side between the struts, and further removably engages the tongue within the slot. characterized by comprising an inverted hook-shaped member having a first portion and a second portion extending forward beyond the upper end of the front strut and having a serrated front blade serving as a tape cutting blade. 12. The device according to claim 11. (14) Adjustment means for changing the diameter of the cylindrical body includes a pawl extending from the rear edge of the slot on the cylindrical body parallel to and toward the central axis of the cylindrical body; a ratchet spool insertable into a ratchet spool having a circular wall portion having an open circular end and a pawl engaging portion having an increasing depth parallel to the slot within the wall portion for insertion of the pawl; 12. A device according to claim 11, characterized in that it comprises: (15) The cylindrical body has a guide bar disposed laterally parallel to the slot, and the ratchet spool is disposed laterally within a wall of the spool aligned with the guide bar. 15. Device according to claim 14, characterized in that it has a guide slot. (16) Claim 1, wherein the feeding device is molded with acetal plastic.
The device according to item 5. (17) a notch is removed from the upper end of the strut;
17. Device according to claim 16, characterized in that the upper end and the notch are covered by a tear-off section consisting of a hard polymer mold. 18. The device of claim 17, wherein said rigid polymer is selected from the group consisting of polystyrene and acrylic. (19) a) a tape roll holder having a tape support extending forwardly and upwardly having a top end and a bottom end; b) an upwardly extending forward strut having a bottom end and a top end; and c) a leading edge. a flexible spring comprising a cylindrical body with a transverse slot having a trailing edge; the tape support and the lower end of the strut are coupled to the leading and trailing edges of the slot, respectively; are biased by the spring into a spaced open position that flares upwardly from the upper end of the tape support, and the upper ends of the tape support and each strut terminate in a wing, and The wings have a tear-off portion extending forward, and when the front strut is pressed against the tape support, the two wings are brought into a butt position, which results in a closed position, and the wings are in a closed position. d) said flexible spring such that said strut moves between said open position and said closed position to form a tape tab; and d) said cylinder from said rear edge of said slot on said cylinder. a pawl extending parallel to and towards the central axis of the body; e) a circular wall portion insertable into said cylindrical body and having an open circular end and said wall surface for insertion of said pawl; a ratchet spool with a pawl engaging portion having a depth that increases in parallel with the slot; a polymer molded tape attached to a tape roll feeder that allows the length of the tape tab to be varied as the front strut is moved between the open and closed positions by varying the spacing of the tape roll feeder; Variable length tape tab forming device.