Advancing material of indeterminate length – By intermittent material-mover – With means varying the material speed during movement
Patent
1980-05-22
1981-10-20
Christian, Leonard D.
Advancing material of indeterminate length
By intermittent material-mover
With means varying the material speed during movement
226136, 226190, B65H 1726
Patent
active
042955890
ABSTRACT:
A device for feeding a web like a microfilm by use of rubber rollers has a stepping motor for driving the rubber roller. The stepping motor is controlled by a pulse generator. A temperature detector is provided for measuring the temperature of the rubber roller or any part of the device having a temperature substantially equal to the rubber roller. The output of the temperature detector is sent to the pulse generator for controlling the stepping motor according to the measured temperature. When the temperature is raised, the stepping motor is controlled to reduce the speed of rotation and the increase in feeding speed due to expansion of the rubber roller is compensated, thereby feeding the web at a constant speed irrespective of the temperature fluctuation.
REFERENCES:
patent: 4061260 (1977-12-01), Copp
patent: 4158429 (1979-06-01), Ohmori
Murakoshi Makoto
Oosaka Shigenori
Christian Leonard D.
Fuji Photo Film Co. , Ltd.
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