Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Punching article from sheet material
Patent
1988-02-26
1989-10-31
Lowe, James
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Punching article from sheet material
162194, 162196, 264339, 336206, B29C 5304
Patent
active
048775673
ABSTRACT:
An electrically insulating formed channel member is made of a sheet of an electrically insulating material capable of being press formed that is cut to provide radially projecting portions. Thereafter, the sheet is press-formed to form a formed channel member including the channel portion and the projection portions and bent to extend along the inner corner of a rectangular pancake coil with the web located at the inner side of the corner curvature. The sheet material may preferably be a dray paper press board. Ripples may be provided in the sheet material prior to the step of press-forming. The moisture in the sheet material may also be adjusted prior to the step of press-forming.
REFERENCES:
patent: 1877629 (1932-09-01), Replogle
patent: 1904268 (1933-04-01), Bronson
patent: 3189681 (1965-06-01), Feather
patent: 3351693 (1967-11-01), Feather et al.
Matsuoka Yoshiyuki
Yoshizumi Yasuji
Lowe James
Mitsubishi Denki & Kabushiki Kaisha
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