Metal deforming – With cutting – By composite tool
Patent
1993-05-26
1994-08-02
Crane, Daniel C.
Metal deforming
With cutting
By composite tool
292435, B23P 1100
Patent
active
053334833
ABSTRACT:
An apparatus for applying a bull nose to adjacent dry wall panels, the apparatus comprising an elongated channel member having a bull nose application surface defined by a central, partially curved portion intersected by a pair of mutually perpendicular flat side portions, the channel member including a pair of transversely disposed slots proximal to one end thereof in which a pair of opposed crimping members are situated and pivotally attached to the channel member for rotation between a first, stored position and a second, crimping position, the crimping members each including a specially configured cutting surface defined by a curved planform having a compound curvature which tapers to a knife edge along symmetrical radii in, the apparatus further including a linkage mechanism attached tot he crimping members for reciprocating, the crimping members between the aforementioned first and second positions, respective, the linkage mechanism comprising a spring loaded anvil member which may be struck by a hammer or mallet, slidably disposed on an elongated rigid shaft attached to and extending outward from the channel member, and dual link pairs pivotally attached to the anvil member and the crimping members at opposite ends thereof, respectively.
REFERENCES:
patent: 345687 (1886-07-01), Hayes
patent: 2178187 (1939-10-01), Sake
patent: 2859445 (1958-11-01), Larrabee
patent: 2944262 (1960-07-01), Richman
patent: 3170162 (1965-02-01), Balinski
patent: 3815235 (1974-06-01), Marlar
patent: 4593443 (1986-06-01), Wolford
patent: 4670957 (1987-06-01), Wolford
patent: 4893493 (1990-01-01), Jacques
patent: 4989438 (1991-02-01), Simon
patent: 5040400 (1991-08-01), Nastasi
Goldblatt Tool Co. catalog, Drywall Tools and Accessories, Hammerhead Cornerbead Clincher, 1987, p. 83.
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