Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1983-08-26
1985-07-23
Simmons, David
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156227, 156443, 156492, 264339, B29D 2310
Patent
active
045307296
ABSTRACT:
A folding apparatus and method for folding a flat sheet so that an exact interior height is provided between the two folded portions is disclosed. The flat sheet is folded about a shim having a folding edge which is rounded and which has a thickness corresponding to the desired interior height. The flat shim is positioned on the flat sheet with the edge of the shim located along the line where the fold in the sheet is to be made. Initially, the portion of the sheet away from the shim is folded approximately 90.degree. by tangential bending on the folding edge of the shim. Next, a die having a facing edge mating with the folding edge of the shim is pushed onto the folding edge of the shim. The portion of the sheet which was folded 90.degree. is thus folded onto the top of the shim to approximately 180.degree.. With this two step folding, an exact interior height adjacent the fold is provided. The method and apparatus of the present invention is conveniently used for forming flat jackets having an exact interior height. A plurality of these flat jackets can be formed by providing a plurality of forming devices on a turntable where each step of the forming process is sequentially performed.
REFERENCES:
patent: 2892217 (1959-06-01), Luboshey
patent: 4153665 (1979-05-01), Vecchiotti et al.
patent: 4272235 (1981-06-01), Barnett
patent: 4310371 (1982-01-01), Appoldt et al.
patent: 4347091 (1982-08-01), Hauck et al.
Crowley Norman
Fuchs Gilbert
Wink Randall
Evana Tool & Engineering Inc.
Simmons David
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