Web feed tractor

Details Web feed tractor Web feed tractor

1987-04-01

1988-09-27

Levy, Stuart S.

Advancing material of indeterminate length

Means to engage longitudinally spaced modifications in material

Pins on flexible belt or chain

G03B 122

Patent

active

047735791

ABSTRACT:
A web feed tractor having a pair of side frames, a driving pulley and at least one idler pulley rotatably supported between the side frames at spaced intervals, an endless feed belt trained around the driving and idler pulleys, at least one support roller rotatably disposed between the side frames and adapted to support the inner surface of the upper reach of the feed belt, and restraining means disposed between the driving and idler pulleys and the feed belt and adapted to restrain lateral meandering of the feed belt.

REFERENCES:
patent: 2353219 (1944-07-01), Capstaff
patent: 2961137 (1960-11-01), Menkel
patent: 3289904 (1966-12-01), Foley
patent: 3392893 (1968-07-01), Bennett et al.
patent: 3507431 (1970-04-01), Hepp et al.
patent: 3608801 (1971-09-01), Nystrand
patent: 3688959 (1972-09-01), Staneck et al.
patent: 3825162 (1974-07-01), Hubbard
patent: 3938721 (1976-02-01), Staneck et al.
patent: 4129239 (1978-12-01), Hubbard
patent: 4130230 (1978-12-01), Seitz
patent: 4194660 (1980-03-01), Seitz

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