Cutting – With product handling means – Means to move – guide – or permit free fall or flight of product
Patent
1986-02-10
1988-02-09
Bell, Paul A.
Cutting
With product handling means
Means to move, guide, or permit free fall or flight of product
83139, 83542, 83684, 83689, B26F 114, B26D 706
Patent
active
047234660
ABSTRACT:
A self-sharpening hole punch for plastic bags includes a pneumatically operated punching apparatus for punching wicket pin receiving holes in a flexible film or plastic bag. If desired, a tear slit may be simultaneously formed to enable the bag to be quickly and readily torn free from the wicket pin upon which the bag is retained. A pneumatic air cylinder has a cylinder rod with a fitting affixed thereto, the fitting having an internal tapered thread. Interchangeable plastic cutting tools, having a complementary tapered thread, may be interchangeably screwed into the fitting to facilitate replacement as necessary. A resiliently compressible cylinder of foam plastic material is disposed in a circular void at the cutting side of each of the plastic cutting tools to expel the waste film discs that are punched out of the film or plastic bag material.
REFERENCES:
patent: 2214743 (1940-09-01), Lamb
patent: 3137188 (1964-06-01), Domka
patent: 3939743 (1976-02-01), Coombes
patent: 4653372 (1987-03-01), Pottorff
Jackson et al., Acetal Homopolymer, Modern Plastics Encyclopedia, pp. 8-9, 1985.
Bell Paul A.
Smith Scott A.
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