Metal deforming – With cutting – By shearing tool-couple
Patent
1994-01-26
1995-10-03
Crane, Daniel C.
Metal deforming
With cutting
By shearing tool-couple
723421, 723792, 72702, B21D 5300
Patent
active
054542510
ABSTRACT:
A manufacturing method of a shutter for a cartridge which is accommodating therein a recording medium includes the steps of punching out a plate-shaped metal material so as to provide a shutter of a developed shape having a pair of plate-shaped portions and a coupling portion for coupling the pair of plate-shaped portions, shaping the punched-out member in such a fashion that the pair of plate-shaped portions are opposed to each other across the coupling portion and that a spacing between free end sides of the pair of plate-shaped portions become narrower than a spacing of the pair of plate-shaped portions at its portion coupled by the coupling portion, and shaping the shaped member such that a spacing between free ends of the pair of plate-shaped portions of the member shaped by the second process become substantially equal to a spacing of the pair of plate-shaped portions at its portion coupled by the coupling member.
REFERENCES:
patent: 3550422 (1970-12-01), Potter
patent: 5007264 (1991-04-01), Haack
patent: 5021913 (1991-06-01), Overland
patent: 5036421 (1991-07-01), Kaneda et al.
patent: 5099675 (1992-03-01), Heath
patent: 5233494 (1993-08-01), Kikuchi
patent: 5237845 (1993-08-01), Kikuchi
Funawatari Takatsugu
Kobayashi Daiki
Taguchi Takashi
Crane Daniel C.
Kananen Ronald P.
Sony Corporation
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