Feeding device having control means, feed rollers, a pulse generator and a photoelectric device for directly measuring rate of feed of an elastic strip having marks thereon for a sewing machine
OwnerPeter W. Easominventor
Life of this patent
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Abstract
A feeding device for feeding elastic strip material to a sewing machine feeding a strip in response to one or more control signals. The strip feeder uses a feed roller having an associated pressure roller to provide a feed nip with the feeding roller, a sensor directly senses the rate of feed of the strip and generates one or more sensing signals. The sensor uses a signal generator which is a rotary pulse generator, or a photoelectric device for detecting marks on the strip. A controller receives the sensing signals and generates control signals for controlling the rate of feed of the strip.
Claims18
A feeding device for feeding elastic strip material to a sewing machine comprises strip feeding means arranged to feed strip in response to at least one control signals, sensing means arranged to directly sense the rate of feed of the strip and to generate at least one sensing signals and control means arranged to receive said sensing signals and generate control signals for controlling the strip feeding means.
In combination a feeding device for feeding elastic strip material to a sewing machine the device comprising strip feeding means arranged to feed strip in response to at least one control signal, sensing means arranged to sense the rate of feed of the strip and to generate at least one sensing signal and control means arranged to receive said sensing signals and to generate control signals for controlling the strip feeding means wherein the sensing means comprises detecting means arranged to detect marks on the strip spaced a predetermined distance apart when the strip is in a relaxed condition whereby to produce sensing signals dependent on the rate of feed, said strip feeding means including a strip, the strip having marks thereon spaced a predetermined distance apart when the strip is in a relaxed condition.
Dependencies are inferred from the claim text.