Receptacles – Receptacle side wall made of two or more layers of material... – Beverage receptacle
Patent
1988-08-19
1990-05-15
Shoap, Allan N.
Receptacles
Receptacle side wall made of two or more layers of material...
Beverage receptacle
72379, 220270, 413 8, B21D 5144, B65D 808, B65D 1700
Patent
active
RE0332178
ABSTRACT:
The present invention relates to improvements in the strength of ends used on metal beverage containers.
Such ends generally comprise a central panel portion of a substantially planer character, a surrounding U-shaped sidewall having inner and outer legs, a curved intermediate portion integrally joining the inner leg to the U-shaped sidewall, and a peripheral curl extending from the outer leg for double seaming the end onto a can body.
In accordance with the present invention, the intermediate portion and adjacent central panel portion are firmly supported by a die while a clamping force is placed on an annular band of the upper surface of the end at the intermediate portion. The clamping force is increased until metal flows inwardly and outwardly from the contact point resulting in a free compression doming of the center panel and an outward deflection of the inner leg. An end of increased buckle resistance is thereby produced which end is approximately within standard dimensions such that customers can use the end on existing seaming equipment without alteration. An optional feature is provided to minimize the compression doming by clamping a peripheral band of the end with a hold-down pad while the metal flowing is accomplished. This reduces the dome depth and results in a strengthened end having a dome depth very close to standard specifications.
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Letter from Ralph R. Rath to R. P. Campbell, dated 1/12/80.
Letter from Ralph R. Rath to R. P. Campbell, dated 2/18/88.
Letter from Robert A. Stengel to Gilbert E. Alberding, dated 4/25/88, Memo from R. D. Zenger to R. A. Stengel, dated 2/15/88.
Attachment 1-"The Battle of Pop Tops Goes On", Chicago Daily News, 11/12/76.
Attachment 2-American National Can Test Request Report 6-716, dated 1/3/77.
Attachment 3-American National Can Test Request Report entitled "Ball Claim of Patent Infringement-Coining O/S Ends".
Attachment 4-American National Can Test Request Report Entitled, "Ecology-End-ENTECH", Samples 06/12/78.
Attachment 5a-"The Pop-Top End", Food Technology in Australia, 6/77, pp. 233-234.
Attachment 5b-"The Pop Top End", Australian Packaging, 5/76, pp. 86-88.
Attachment 6-American National Can Test Request Report Entitled "Ecology Ends-BHP"; dated 5/20/77.
Attachment 7-American National Can Memo re Broken Hill, 3/8/76.
Attachment 8-American National Can Test Request Rpt. entitled "209 Kaiser AL Ends-DIE 5R", 05/12/76.
Attachment 9a-National Can Corporation Drawing ST-2-98, dated 11/5/85.
Attachment 9b-National Can Corporation Drawing DD-166-B, dated 7/12/78.
Attachment 9c-National Can Corporation Drawing DD-018-B, datd 3/4/77.
Memorandum from S. Misra re Dynamic III, ends at Birmingham, 3/27/81, EPO Search Report Appln. EP 84 11 2243.
Letter Dated May 12, 1987 of R. P. Campbell.
Letter Dated Nov. 6, 1987, from Frost & Jacobs.
Exhibit A-Stolle Drawing C-S0688 and Bill of Material BM-68672.
Exhibit B-Owens-Illinois Engineering Specifications Stolle Shipping Transmittals S-24803, S-23498.
Stolle Purchase Requisition S-17445, Stolle Purchase Order S-17445.
Owens-Illinois Drawing D-02000, Stolle Changes Drawing Dated 1979.
Exhibit C-Stolle Drawing C-94704.
Exhibit D-Kaiser Drawing CDT-B-3608-PE.
Exhibit E-Jos. Schlitz Drawing 32 WOA-9341.
Exhibit F-Stolle Drawing B-94964.
Exhibit G-Stolle Drawing D-81840.
Alberding Gilbert E.
Ball Corporation
Shoap Allan N.
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