Cutting – With product handling means – By fluid current
Patent
1983-07-19
1985-08-13
Meister, James M.
Cutting
With product handling means
By fluid current
83560, 83635, 83639, 83685, B26F 114
Patent
active
045342504
ABSTRACT:
A miniature pneumatic punch for a strip of photographic print paper, to punch a hole between adjacent photographs at the exposure stage of the printing process. The punch comprises a cylinder body having a chamber and a piston seated within to be pneumatically driven between upper and lower limits in the chamber. For this purpose, actuation and retraction air inlet ports are provided through the wall of the chamber. Fluid communication within the cylinder chamber between the ports is prevented by the piston. An elongated guide of constant cross-section is secured centrally to the piston on the side thereof exposed to the air from the retraction air inlet port. A passageway is provided through the cylinder body below the chamber, the passageway being of constant crosssectional and flushly receiving the guide for sliding movement therein. An elongated punch of the same or less crosssection dimension than the guide is centrally secured to the free end of the guide. A central relatively restricted air passageway for removing slugs of puched paper from the punch area extends from one of the air inlet ports through the guide and punch. A die body is rigidly secured directly to the cylinder, the die body having a slot extending through it in the direction of motion of the punch. The punch is flushly received in the slot at its end proximate the cylinder body. A notch is provided between the cylinder body and the die, to coincide with the axial extent of the cylinder body and to receive and permit passage of the paper strip to be punched. Such a punch may be readily constructed in miniaturized form and virtually eliminates problems of alignment of punch and die. In operation it operates quickly, efficiently and accurately, forming small holes between adjacent photograph exposures on strips on photographic print paper.
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