Advancing material of indeterminate length – By orbitally traveling material-engaging surface – On endless belt or chain
Patent
1986-07-28
1988-10-04
Levy, Stuart S.
Advancing material of indeterminate length
By orbitally traveling material-engaging surface
On endless belt or chain
53389, 53552, 226115, 226121, 226134, 242 7545, B65B 906, B65B 4116, B65H 2004, B65H 2318
Patent
active
047750880
ABSTRACT:
An intermittent web feeding apparatus for intermittently feeding fixed length of a web of material during one cycle of a feeding operation by the cooperative operation of a pair of feed rollers for unwinding a web of material from a roll of web material and feeding the web of material to a web processing machine such as a bag-forming and packing machine, and for feeding the web of material to a processing position within the web processing machine, is disclosed. The intermittent web feeding apparatus is equipped with a single servomotor for driving the feed rollers through means of a first transmission mechanism, and the feeding units through means of a second transmission mechanism. The second transmission includes a one-way clutch for delaying the stoppage of the feeding units for a suitable period of time relative to the feed rollers so that the portion of the web of material extending between the feed rollers and the feeding units is kept in a moderately taut state when the web feeding operation is interrupted.
REFERENCES:
patent: 2948931 (1960-08-01), Smith
patent: 3112055 (1963-11-01), Hartley
patent: 3635386 (1972-01-01), Kallenberg
patent: 4011978 (1977-03-01), Lehmacher et al.
patent: 4288965 (1981-09-01), James
patent: 4691499 (1987-09-01), Umeda et al.
Fuji Machinery Company Ltd.
Levy Stuart S.
Sohacki Lynn M.
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