US2047830A - Press tool - Google Patents

Press tool Download PDF

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Publication number: US2047830A
Authority: US; United States
Prior art keywords: tool; score; bead; blank; press
Prior art date: 1935-04-25
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 - Lifetime

Application number

US37517A

Inventor

Lofts Sidney Edward

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Individual

Original Assignee

Individual

Priority date (The priority date 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 date listed.)

1935-04-25

Filing date

1935-08-23

Publication date

1936-07-14

1935-08-23 Application filed by Individual filed Critical Individual

1936-07-14 Application granted granted Critical

1936-07-14 Publication of US2047830A publication Critical patent/US2047830A/en

1953-07-14 Anticipated expiration legal-status Critical

2003-08-25 Assigned to SELKIRK CANADA U.S.A., INC., U.S. INDUSTRIES, INC., PRESCOLITE, INC., KIM LIGHTING INC., ARCHITECTURAL AREA LIGHTING, INC., SANITARY-DASH MANUFACTURING CO. INC., ZURN GOLF HOLDING CORPORATION, ARROW CONSOLIDATED CORPORATION, GARY CONCRETE PRODUCTS, INC., CARLSBAD CORP., BRUCKNER MANUFACTURING COP., BATHCRAFT INC., SELKIRK, INC., HL CAPITAL CORP., COLUMBIA LIGHTING, INC., ZURN INDUSTRIES, INC., IXL MANUFACTURING COMPANY, INC., ZURCO, INC., NEPCO OF PAKISTAN, INC., LUXOR INDUSRIES, INC., USI FUNDING, INC., COLUBMIA LIGHTING PROPERTIES, INC., NEPCO OF FORD HIGHTS, INC., MAILIKAI LAND DEVELOPMENT CORPORATION, GATSBY SPAS, INC., COLUMBIA LIGHTING-LCA, INC., NEPCO OF CANADA, INC., COMPAX CORP., PRESCOLITE LITE CONTROLS, INC., JUSI HOLDINGS, INC., DUAL-LITE MANUFACTURING, INC., PH PROPERTY DEVELOPMENT COMPANY, PROGRESSIVE LIGHTING PROPERTIES, INC., BAYLIS BROTHERS, INC., TA LIQUIDATION CORP., ZURNACQ OF CALIFORNIA, INC., EZ HOLDING, INC., MOBILITE INC., UGE LIQUIDATION INC., NEPCO OF AUSTRALIA, INC., SELKIRK EUROPE U.S.A., INC., DUAL-LITE INC., TT LIQUIDATION CORP., USI PROPERTIES, INC., USI REALTY CORP., USI CAPITAL, INC., USI ATLANTIC CORP., LCA (NS) INC., USI AMERICAN HOLDINGS, INC., JACUZZI INC., ELJER INDUSTRIES, INC., AMES TRUE TEMPER PROPRETIES, INC., ENVIRONMENTAL ENERGY COMPANY, NEPCO OF FULTON, INC., PROGRESSIVE LIGHTING, INC. (NC), SPAULDING LIGHTING, INC., PROGRESS LIGHTING, INC., ZURN (CAYMAN ISLANDS), INC., REDMONT, INC., LOKELANI DEVELOPMENT CORPORATION, ELJER PLUMBINGWARE, INC., ZURN DEVCO, INC., AMES TRUE TEMPER, INC., ZURN CONSTRUCTORS, INC., JACUZZI WHIRLPOOL BATH, INC., PROGRESSIVE LIGHTING, INC. (SC), ASTERIA COMPANY, COLUMBIA MATERIALS, LLC, STRATEGIC CAPITAL MANAGEMENT, INC., COLUMBIA LIGHTING MFG., INC., ZURN EPC SERVICES, INC., TRIMFOOT CO., OUTDOOR PRODUCTS LLC, USI GLOBAL CORP., LIGHTING CORPORATION OF AMERICA, INC., SUNDANCE SPAS, INC., UNITED STATES BRASS CORP., NISSEN UNIVERSAL HOLDINGS INC., STREAMWOOD CORPORATION, LCA GROUP INC., KLI, INC. reassignment SELKIRK CANADA U.S.A., INC. RELEASE OF SECURITY INTEREST IN INTELLECTUAL PROPERTY Assignors: WILMINGTON TRUST COMPANY AS CORPORATE TRUSTEE

Status Expired - Lifetime legal-status Critical Current

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Classifications

- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
- B21D51/383—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures scoring lines, tear strips or pulling tabs

Definitions

This invention relates. tqpress tools for forming the sheet.;meta1-ends of-cans or: like containers; i -The invention is concerned with the formation ofican ends which are provided on the inner or outer" surface with a score. which facilitates openingv of the ,can,-the material: adjacent the score being strengthened by a rib.
the score is; continuousiorexample in a circular form, and a reinforcement is-ipirovided. on the inside of; thescore to strengthen'th'e material which is to be-removed when the can 'is opened.
a p es tool for forming can ends 'fron blanks provided with a b comnr s natwoi -o r ins 10.0
the press when the press is set to produce the correct score in a sheet of accurate thickness, not only is the material left at the score less for a relatively thin sheet than for a relatively thick sheet, but also the depth of the score is greater for the thinner sheet; thus accentuatin'g the difference in thickness of the material at the score for the difierentthicknesses of sheet.
the thickness of material at the score I mean the distance between the deepest partof the incision and the opposite surface of the sheet.
the thickness of material at the score is a most important consideration -in the final product as any slight departure from a predetermined thickness at this point may render the product unsatisfactory. If this thickness istoo small the product is weakened-to a serious extent"whereas if it is toolarge-the score is not adequate 'for its -purpose of permitting easy opening of thecontainer.
Another object of the presentinvention is to provide a press tool whereby entirely satisfactory scores 'canbeproduced' irrespective of any'variatiorisin the thick;- ness of the -'material and hence to avoid waste of the material now resulting from the production of so many unsatisfactory products.
a press tool for'producing scores in sheet metal wherein 'the tool parts are provided with cO-operating stopmem' bers to determine the minimum separation of the tool partsand the thickness of material at the score.
the thickness of 'the 'material at the score is maintained'constant Figure 4" is'asimilar view of the'final can end.
the top'tool' part comprises a block I 0, adapted to be carried'in the movable part of the press, and a ringmember H mounted within a housing l2 secured in' this block by meansof studs is also provided.
the bottom tool shown in Figure 2 comprises a base ⁇ 5 adapted to besecured to the bed-plate of the press andcarries the lower tool partwhich comprises a scoring ring t6 and a deforming member I? which co-operate respectivelywith the flat inner surface l8 a'nd theSinner surface I9 of the ring member H.
the bottom tool also comprises a pressure pad 20, and surrounding the scoring ring it, a pressure ring 2
the contacting surface of" thestop member 25 is preferably formed with grooves 21 to ensure close contact of this stop.
a press tool for forming can ends from blanks having a bead comprising two cooperating'tool members which are provided'with coop-' erating parts for producing a' score adjacent to the bead and with other cooperating parts spaced M respectively from said scoring parts according to proximity of the score to the bead, for distorting V
the construction of the blank which 15170 form the can end is shown in Figure 3 and is provided with a bead 3
This blank is fed on to the pressure pad and the top tool is then-brought down on to the blank.
the pressure pad [4 of the top tool first makes contact with the blank-and, in conjunction with the pressure 'pad- 20 serves to hold theblank in position.
the lower annular surface of the housing !2 engages with theflange M of the blank and, in conjunction with the inclined surface 28 of the stop member 25, turns up the end of the an of the blank to force this bead outwardly towards the score in order to form the reinforcing ridge 35.
the deforming part' I! of the bottom tool is inclined inthe direction to ensurethat the bead shall be forced outwardly towards the score, and preferably the co-operating surface of the top' tool is ofcomplementary shape.
The'stop member. and the co-operating stop surface 26 are so formed with regard to the tool parts that when these stop membersare brought "into-contact the scoring edge of the ring I6 is "separated from the cooperating surface N3 of thetop tool part by a distance predetermined to provide the required thickness of material at the score.
the stop members thus'positivelycontrol the thickness of material at the score in the blanks produced by the press tool'regardless of variations in thickness of the. material, and thus theproducts which are obtained are all uniform .in this respect.
the surface l9 of the top tool may be cut away to provide a clearance space, the deforming action being effected by the part ll of the bottom tool.
the stop members may be modified in form, for example they may be formed in'one with the respectivetool parts themselves and also instead of being annular members they may be of any other desired form depending for instance on the'shape of the blank. It is preferable, however, to make the contacting surfaces of the surrounding members of a fairly large area in order to minimize the wear which takes place between the co-operating parts of the tool.
.A .press tool for forming can ends from blanks having a bead comprising two cooperating tool members which are provided with two cooperating scoring parts for producing a score in the blank adjacent to the bead and with two cooperating forming parts spaced respectively from said'scoring parts according to proximity of the score to the bead,for distorting the bead to'provide-a reinforcing rib close to the score f in one operation of the tool, at least one of said forming parts being inclineded in the direction to deform the bead towards thescore.
a I press tool-for forming in one operation 7 can ends from blanks provided with a bead, com- .prising a tool member having a scoring edge for producinga score in the blank adjacent to the bead'nandflan inner pressure part spaced, from' said scoring edge according to the proximity of the score to the bead, for distorting the bead to provide a reinforcing rib close to the score,
A'press tool for forming in one operation can-ends from blanks provided with a bead comprising a tool member'having a scoring edge for producing a score in the blank at the outer side Y of .the bead, and a pressure part internally of the scoring edge to engage the bead and inclined in the direction to distort the bead outwardly to- -member to distort the bead outwardlyin the direction of the score.
a press toolfor forming in one operation can ends from blanks provided with a bead, com- Y prising a tool member having a scoring edge for producing ascore in the blank at the outer side.

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Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Shaping Metal By Deep-Drawing, Or The Like (AREA)

Description

S. E. LOFTS PRESS TOOL July 14, I936.

Filed Aug. 23, 1935 Patented July 14, 1936 PRESS root.

Sidney Edward Lofts, Ewell, England .,This invention relates. tqpress tools for forming the sheet.;meta1-ends of-cans or: like containers; i -The invention is concerned with the formation ofican ends which are provided on the inner or outer" surface with a score. which facilitates openingv of the ,can,-the material: adjacent the score being strengthened by a rib. I Usually the score is; continuousiorexample in a circular form, and a reinforcement is-ipirovided. on the inside of; thescore to strengthen'th'e material which is to be-removed when the can 'is opened.

.Insome cases, thescore is not continuous soxas to leave an uncut=portion to. serve as a hinge for the part which is to be opened;

--In forming such-can ends it is the practice to first forma bead for reinforcing purposes duped by such a subsequent operation. f

It has been found that a can end produced by scoring a. blank provided with a bead; as hereinbefore described I is not satisfactory for easy opening and that it is-necessary that the bead should be distorted, so as, to. provide arib which ncl n d t wards the scorethus pr ducin i the preferred form a doublethickness of? metal close tothe scorewhich will enable the material of the can-end within the score tojibe easily removed Without buckling. g y

rAn biett f the present inv ntion s to vide mproved press t l ior ermi i can nd u h'a s o e nd f rc ileir blank ovide with a b ad.

- T nv n i n a o d n y comp ises. a p es tool for forming can ends 'fron blanks provided with a b comnr s natwoi -o r ins 10.0

*parts which ar pr v d d o ra in l m n s for produ a sc r adia nt o th headand witlioth c -qp ra e m nt f distorting the head to producea reinforcing rib c o e t he score by m an of a. in p ration iofgthe'one tool., 1

Th nce-operati lemen s f he 991. for

formin t e co usua ly-compri e cor edge on one'too l partsand a co=operating--flat surface on the othert ool partpand heretofore cons derable ,difficuit has: been encountered n producing satisfactory scores; mainlydueto the permitted tolerance as regards; the thickness of a any iv n standa d au mater a u h a 0 mercial tin plate. Although the variation in thiekness is relatively small it has serious efiects ofi'tlfienature' of the score produced. It has been found in practice that when the press is set to produce the correct score in a sheet of accurate thickness, not only is the material left at the score less for a relatively thin sheet than for a relatively thick sheet, but also the depth of the score is greater for the thinner sheet; thus accentuatin'g the difference in thickness of the material at the score for the difierentthicknesses of sheet. By the thickness of material at the score I mean the distance between the deepest partof the incision and the opposite surface of the sheet.

Now the thickness of material at the score is a most important consideration -in the final product as any slight departure from a predetermined thickness at this point may render the product unsatisfactory. If this thickness istoo small the product is weakened-to a serious extent"whereas if it is toolarge-the score is not adequate 'for its -purpose of permitting easy opening of thecontainer. Another object of the presentinvention is to provide a press tool whereby entirely satisfactory scores 'canbeproduced' irrespective of any'variatiorisin the thick;- ness of the -'material and hence to avoid waste of the material now resulting from the production of so many unsatisfactory products.

According 'to a further feature-of the-present invention there is provided a press tool for'producing scores in sheet metal wherein 'the tool parts are provided with cO-operating stopmem' bers to determine the minimum separation of the tool partsand the thickness of material at the score. By this means the thickness of 'the 'material at the score is maintained'constant Figure 4" is'asimilar view of the'final can end.

Referring to the drawing, the top'tool' part comprises a block I 0, adapted to be carried'in the movable part of the press, and a ringmember H mounted within a housing l2 secured in' this block by meansof studs is also provided.

The bottom tool shown in Figure 2 comprises a base {5 adapted to besecured to the bed-plate of the press andcarries the lower tool partwhich comprises a scoring ring t6 and a deforming member I? which co-operate respectivelywith the flat inner surface l8 a'nd theSinner surface I9 of the ring member H. The bottom tool also comprises a pressure pad 20, and surrounding the scoring ring it, a pressure ring 2|, the pad and they :are treated in parts in operation. The contacting surface of" thestop member 25 is preferably formed with grooves 21 to ensure close contact of this stop.

member with the surface 26 of the top tool.

I claim:

1. A press tool for forming can ends from blanks having a bead, comprising two cooperating'tool members which are provided'with coop-' erating parts for producing a' score adjacent to the bead and with other cooperating parts spaced M respectively from said scoring parts according to proximity of the score to the bead, for distorting V The construction of the blank which 15170 form the can end is shown in Figure 3 and is provided with a bead 3|! of circular form, and in addition with a flanged part 3| whioh'is to form the means of securing the can end to the-body of the can. This blank is fed on to the pressure pad and the top tool is then-brought down on to the blank. The pressure pad [4 of the top tool first makes contact with the blank-and, in conjunction with the pressure 'pad- 20 serves to hold theblank in position. The lower annular surface of the housing !2 engages with theflange M of the blank and, in conjunction with the inclined surface 28 of the stop member 25, turns up the end of the an of the blank to force this bead outwardly towards the score in order to form the reinforcing ridge 35. The deforming part' I! of the bottom tool is inclined inthe direction to ensurethat the bead shall be forced outwardly towards the score, and preferably the co-operating surface of the top' tool is ofcomplementary shape.

The'stop member. and the co-operating stop surface 26 are so formed with regard to the tool parts that when these stop membersare brought "into-contact the scoring edge of the ring I6 is "separated from the cooperating surface N3 of thetop tool part by a distance predetermined to provide the required thickness of material at the score. The stop members thus'positivelycontrol the thickness of material at the score in the blanks produced by the press tool'regardless of variations in thickness of the. material, and thus theproducts which are obtained are all uniform .in this respect.

It will be understood that the under surface of the can end as shown in Figures 3 and 4,is intended to be on theoutside when the can end is subsequently joined to the bodyof the can, and the can ends are shown in this position because the, inverted position in the tool.

The surface l9 of the top tool may be cut away to provide a clearance space, the deforming action being effected by the part ll of the bottom tool. Furthermore, the stop members may be modified in form, for example they may be formed in'one with the respectivetool parts themselves and also instead of being annular members they may be of any other desired form depending for instance on the'shape of the blank. It is preferable, however, to make the contacting surfaces of the surrounding members of a fairly large area in order to minimize the wear which takes place between the co-operating parts of the tool.

thebead to provide a reinforcing rib closeto the said score by meansof a single operation of the one tool for each blank.

2. .A .press tool for forming can ends from blanks having a bead, comprising two cooperating tool members which are provided with two cooperating scoring parts for producing a score in the blank adjacent to the bead and with two cooperating forming parts spaced respectively from said'scoring parts according to proximity of the score to the bead,for distorting the bead to'provide-a reinforcing rib close to the score f in one operation of the tool, at least one of said forming parts beinginclined in the direction to deform the bead towards thescore.

V 3. A I press tool-for forming in one operation 7 can ends from blanks provided with a bead, com- .prising a tool member having a scoring edge for producinga score in the blank adjacent to the bead'nandflan inner pressure part spaced, from' said scoring edge according to the proximity of the score to the bead, for distorting the bead to provide a reinforcing rib close to the score,

and a cooperating tool member having a pressure part cooperating withsaid scoring edge in form- .ing the score.

- 4. A'press tool for forming in one operation can-ends from blanks provided with a bead comprising a tool member'having a scoring edge for producing a score in the blank at the outer side Y of .the bead, and a pressure part internally of the scoring edge to engage the bead and inclined in the direction to distort the bead outwardly to- -member to distort the bead outwardlyin the direction of the score.

5. A press toolfor forming in one operation can ends from blanks provided with a bead, com- Y prising a tool member having a scoring edge for producing ascore in the blank at the outer side.

of the bead, a pressure part internally of the scoring edge to engage the bead and inclined in the direction to distortthe bead outwardly towards the score,'a stop member surrounding and rigid with said tool member, a cooperating toolme'me ber comprising an abutmentsupporting'the blank against pressure applied by the scoring edge of the other tool member, a pressure part complementary with the pressure part of the other tool member to distort the bead outwardly in the direction of the score, and a stop membersurrounding and rigid with said cooperating tool Ii member, which stop members abut in the operation of the tool to determine the minimum separation of the scoring edge from the cooperating abutment of the other tool member in order. to

' control the thickness of the material at the 'deep-' estpart of the score. 7

' SIDNEY EDWARD LQFTS.

US37517A 1935-04-25 1935-08-23 Press tool Expired - Lifetime US2047830A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
FR2047830X		1935-04-25

Publications (1)

Publication Number	Publication Date
US2047830A true US2047830A (en)	1936-07-14

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Family Applications (1)

Application Number	Title	Priority Date	Filing Date
US37517A Expired - Lifetime US2047830A (en)	1935-04-25	1935-08-23	Press tool

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2790408A (en) *	1951-06-09	1957-04-30	Walensky Benno	Apparatus for scoring flat bodies such as lids and end closures for cans and like containers
US3875884A (en) *	1971-11-03	1975-04-08	Nat Can Corp	Full open end and method of making
US3977341A (en) *	1974-06-06	1976-08-31	Aluminum Company Of America	Easy opening container component
US5356256A (en) *	1992-10-02	1994-10-18	Turner Timothy L	Reformed container end
US5590807A (en) *	1992-10-02	1997-01-07	American National Can Company	Reformed container end

1935
- 1935-08-23 US US37517A patent/US2047830A/en not_active Expired - Lifetime

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2790408A (en) *	1951-06-09	1957-04-30	Walensky Benno	Apparatus for scoring flat bodies such as lids and end closures for cans and like containers
US3875884A (en) *	1971-11-03	1975-04-08	Nat Can Corp	Full open end and method of making
US3977341A (en) *	1974-06-06	1976-08-31	Aluminum Company Of America	Easy opening container component
US5356256A (en) *	1992-10-02	1994-10-18	Turner Timothy L	Reformed container end
US5527143A (en) *	1992-10-02	1996-06-18	American National Can Company	Reformed container end
US5590807A (en) *	1992-10-02	1997-01-07	American National Can Company	Reformed container end
US5598734A (en) *	1992-10-02	1997-02-04	American National Can Company	Reformed container end

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US2360354A (en)	1944-10-17	Cartridge casing and method of making same
US2047830A (en)	1936-07-14	Press tool
GB1517613A (en)	1978-07-12	Method and apparatus for forming a part from sheet stock
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US4065951A (en)	1978-01-03	Split punch for drawing and ironing containers
US3687099A (en)	1972-08-29	Scoring metal container components
US2067269A (en)	1937-01-12	Method of making tractor shoes and similar articles
US2187433A (en)	1940-01-16	Method of forming an easy opening container
US3857166A (en)	1974-12-31	Method of riveting a pull tab to a can top
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US3695201A (en)	1972-10-03	Method and apparatus for making corrugated crown caps
US2695728A (en)	1954-11-30	Box construction
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US1192066A (en)	1916-07-25	Shaping and cutting die.
US3634579A (en)	1972-01-11	Method of manufacture of container and closure
US3426571A (en)	1969-02-11	Controlled embossing
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US1523687A (en)	1925-01-20	Rivet
US2770034A (en)	1956-11-13	Method of coining and cupping metal
US2133466A (en)	1938-10-18	Method of and apparatus for making knurled socketed screws
US1724158A (en)	1929-08-13	Dies for making can nozzles
US1647547A (en)	1927-11-01	Metallic bank
US1935727A (en)	1933-11-21	Method of making sliders for fasteners
US942989A (en)	1909-12-14	Die for use in the manufacture of eyelets.

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2003-08-25	AS	Assignment	Owner name: UNITED STATES BRASS CORP., FLORIDA Free format text: RELEASE OF SECURITY INTEREST IN INTELLECTUAL PROPERTY;ASSIGNOR:WILMINGTON TRUST COMPANY AS CORPORATE TRUSTEE;REEL/FRAME:015134/0225 Effective date: 20030715 Owner name: ZURN INDUSTRIES, INC., FLORIDA Free format text: RELEASE OF SECURITY INTEREST IN INTELLECTUAL PROPERTY;ASSIGNOR:WILMINGTON TRUST COMPANY AS CORPORATE TRUSTEE;REEL/FRAME:015134/0225 Effective date: 20030715 Owner name: USI FUNDING, INC., FLORIDA Free format text: RELEASE OF SECURITY INTEREST IN INTELLECTUAL PROPERTY;ASSIGNOR:WILMINGTON TRUST COMPANY AS CORPORATE TRUSTEE;REEL/FRAME:015134/0225 Effective date: 20030715 Owner name: KLI, INC., FLORIDA Free format text: RELEASE OF SECURITY INTEREST IN INTELLECTUAL PROPERTY;ASSIGNOR:WILMINGTON TRUST COMPANY AS CORPORATE TRUSTEE;REEL/FRAME:015134/0225 Effective date: 20030715 Owner name: SELKIRK, INC., FLORIDA Free format text: RELEASE OF SECURITY INTEREST IN INTELLECTUAL 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