Clarence L Moyse

US Patent:

43257690, Apr 20, 1982

Filed:

Jan 14, 1980

Appl. No.:

6/111731

Inventors:

Richard J. Moyse - Port Washington NY
Clarence L. Moyse - Largo FL

International Classification:

B23P 1904
F16J 304
G03B 1704

US Classification:

156217

Abstract:

A method for making an axially extendable and contractable bellows is provided for use in monolayer photographic lithographic cameras and enlargers. The method includes the initial step of passing a single web of synthetic resin sheet material past at least one die having die edges arranged in a predetermined pattern for producing a separable bellows blank having fold lines formed therein for forming of multiplicity of pleats. Then the bellows blank is die formed and following its separation from the web it is folded onto itself to produce a seam which is then bonded. Finally, the hollow body thus formed is compressed along its longitudinal axis and along the fold lines so as to produce a pleated bellows configuration.