Metal deforming – By application of fluent medium – or energy field – With cutting
Patent
1979-10-22
1981-04-21
Gilden, Leon
Metal deforming
By application of fluent medium, or energy field
With cutting
72 54, 72 60, 29421R, B21D 2200
Patent
active
042625149
ABSTRACT:
Apparatus for bending a laminated panel about at least one intended bend line extending parallel with the bottom of a notch formed in the backing of the panel. The panel is retained in engagement with a forming edge which extends along and is at least coextensive with the bend line. The panel and the forming edge are supported spaced-apart from a base. A substantially air-impervious membrane covers the panel and cooperates with the base to provide a substantially closed chamber. Means is provided establishing a pressure within the chamber which is less than the pressure outside of the chamber, whereby the pressure outside of the chamber forces the panel to bend about the forming edge thereby to place the panel portions on opposite sides of the bend line in angular relation relative to each other. A method for bending laminated panels is disclosed.
REFERENCES:
patent: 1671084 (1928-05-01), Meyercord
patent: 3440790 (1969-04-01), Nerem
patent: 3757559 (1973-09-01), Welsh
patent: 3881338 (1975-05-01), Tischuk
patent: 3911554 (1975-10-01), Ford
patent: 4013284 (1977-03-01), Demetre
patent: 4045986 (1977-09-01), Laycock et al.
patent: 4119309 (1978-10-01), Majer et al.
Howell Norbert C.
Tischuk Walter
Gilden Leon
H. H. Robertson Company
Manias George E.
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