发明授权
- 专利标题: Pull tab for easy open end
- 专利标题(中): 拉片可方便开放
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申请号: US513447申请日: 1983-07-13
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公开(公告)号: US4465204A公开(公告)日: 1984-08-14
- 发明人: Elton G. Kaminski , Carl F. McEldowney
- 申请人: Elton G. Kaminski , Carl F. McEldowney
- 申请人地址: OH Sidney
- 专利权人: The Stolle Corporation
- 当前专利权人: The Stolle Corporation
- 当前专利权人地址: OH Sidney
- 主分类号: B21D19/12
- IPC分类号: B21D19/12 ; B21D51/00 ; B21D51/26 ; B21D51/38 ; B21D51/44 ; B21D53/00 ; B65D20060101 ; B65D17/32 ; B65D17/34 ; B65D17/347 ; B65D17/353 ; B65D41/32 ; B65D43/26 ; B65D51/22
摘要:
An easy open can end having a retained tear strip extending diametrically partly across the can end defined by a score line, and a graspable pull tab adjacent and outside the open end of the score line. The pull tab is provided with a nose portion to initiate a tear along the score line upon lifting of the pull tab. The edges of the nose portion are curled into a cylindrical cross-sectional shape to provide a high beam strength and to rigidize the nose portion and to prevent failure by bending before the tear strip is opened. A method for manufacture of the pull tab includes forming at least one relief knotch in the peripheral edge of the pull tab blank at the nose end thereof, whereby to relieve compressive forces when the edge is curled, and curling the peripheral edge of the nose portion in successive steps to form an edge portion of continuous cylindrical cross-sectional shape.
公开/授权文献
- US5653147A Expandable retainer for conduit end fitting 公开/授权日:1997-08-05
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