Reduced-skew web drive between rollers of differing coefficients

Details Reduced-skew web drive between rollers of differing coefficients Reduced-skew web drive between rollers of differing coefficients

1993-01-22

1994-07-05

Stodola, Daniel P.

Advancing material of indeterminate length

By orbitally traveling material-engaging surface

Comprising rotary pinch pair

226189, 400636, B41J 1500

Patent

active

053260112

ABSTRACT:
A web of material, typically paper, metal or film and most commonly roll photographic plate material, passes between a first, driven, roller made from material with a high coefficient of friction, typically neoprene rubber, and a second, driven, roller made from material with a low coefficient of friction, typically metal or nylon. The high-friction drive roller (only) is positionally adjustable. The web is driven straight ahead, without appreciable undesirable steering or skew, over a broad range of adjustments of the separation, and the parallelism, between the two rollers. The web motion is responsive substantially to only the high-friction drive roller, and the web speed may accordingly be regulated, including so as to be maintained highly uniform, in response to the drive roller (only).

REFERENCES:
patent: 3107957 (1963-10-01), Batlas et al.
patent: 3292444 (1966-12-01), Bentley
patent: 3310214 (1967-03-01), Nesin
patent: 3402868 (1968-09-01), Hammond
patent: 4053092 (1977-10-01), Edwards
patent: 4544253 (1985-10-01), Kummerl
patent: 5221035 (1993-06-01), Suzuki et al.

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