Advancing material of indeterminate length – Means to engage longitudinally spaced modifications in material – Pins on flexible belt or chain
Patent
1981-01-16
1983-12-20
Gilreath, Stanley N.
Advancing material of indeterminate length
Means to engage longitudinally spaced modifications in material
Pins on flexible belt or chain
226170, B65H 1738
Patent
active
044212615
ABSTRACT:
A web feed tractor having an endless belt with drive pins which engage the perforations in a web such as computer forms which are to be driven has a frame which define concave and convex reaches of the belt. An outwardly open convex slot and a partially closed concave slot along opposite edges of the frame support and guide the belt reaches. The tips of the pins extending from the belt along the concave reach of the belt are in sliding contact with the outer wall of the partially closed slot. The tractor is compact and the concave reach of the belt which is not in driving relationship with the web is retained inside the tractor structure so that it does not interfere with other parts of the equipment in which the tractor is installed. The tractor is concavo-convex and oblong in shape or somewhat banana shaped.
REFERENCES:
patent: 3113823 (1963-12-01), Phillips
patent: 3746228 (1973-07-01), Arnold
patent: 3825162 (1974-07-01), Hubbard
patent: 3908883 (1975-09-01), Bellisai et al.
patent: 4079876 (1978-03-01), Malachowski
patent: 4129239 (1978-12-01), Hubbard
patent: 4194660 (1980-03-01), Seitz
patent: 4199091 (1980-04-01), Hubbard
patent: 4226353 (1980-10-01), Blaskovic et al.
Gilreath Stanley N.
Lukacher Martin
Precision Handling Devices Inc.
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