Advancing material of indeterminate length – With material-responsive control means – To regulate longitudinal movement of material
Patent
1994-02-14
1994-11-22
Crowder, Clifford D.
Advancing material of indeterminate length
With material-responsive control means
To regulate longitudinal movement of material
226194, 226118, B65H 2318
Patent
active
053661303
ABSTRACT:
A device is adapted to reduce as much as possible the effective length of a spring for providing a load on a mobile member, such as a dancer roller for absorbing the slackness in a web of packaging material, with respect to the distance by which it may move. Two pinions with different diameters are affixed to the mobile member, the larger pinion engaging with a mobile rack and the smaller pinion engaging with a fixed rack. The mobile rack is adapted to move so as to cancel the displacement by the mobile member by a distance determined by the ratio of the diameters of the pinions, thereby reducing the effective length of the spring.
REFERENCES:
patent: 3322315 (1967-05-01), Eberlin
patent: 3475255 (1969-10-01), Lang
patent: 3659767 (1972-05-01), Martin
patent: 3823859 (1974-07-01), Anderson
patent: 3861303 (1975-01-01), Darn, Jr.
patent: 5083693 (1992-01-01), Pohl
patent: 5195690 (1993-03-01), Cross et al.
Calvert John J.
Crowder Clifford D.
Ishida Co. Ltd.
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