Method and apparatus for manufacturing door frames

Details Method and apparatus for manufacturing door frames Method and apparatus for manufacturing door frames

1978-04-20

1979-11-27

Larson, Lowell A.

Metal working

Method of mechanical manufacture

Assembling or joining

29432, 29771, 144309N, B27F 702

Patent

active

041753135

ABSTRACT:
A method and apparatus for making rectangular frames, e.g., for doors, are described. Stiles and headers are spaced apart on conveyors, automatically closed into rectangles, and fastened at the corners without clamping them together. Fastening means, e.g., staple guns, are suspended to pivot through arcs above the frame and inject fasteners when they are in the bottom dead center position in the arcs. Stiles with lockblocks attached can be rotated to position the lockblocks inside the rectangle.

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patent: 3106136 (1963-10-01), Langas et al.
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patent: 3564702 (1971-02-01), Hurn et al.
patent: 3574920 (1971-04-01), Stirling et al.
patent: 3628714 (1971-12-01), Offenwanger
patent: 3681842 (1972-08-01), Blakeslee
patent: 3763547 (1973-10-01), Blakeslee
patent: 3822815 (1974-07-01), Davis
patent: 4039112 (1977-08-01), Schultz

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