Roll film carrier used in reader or reader printer
First Claim
Patent Images
1. A roll film carrier applicable to a reader or a reader printer, including:
- supply reel means for supplying a roll film;
take-up reel means for winding up said roll film drawn from said supply reel means;
means for driving said take-up reel means so as to transport said roll film from said supply reel means to said take-up reel means;
means for generating signals corresponding to a predetermined rotation of said supply reel means;
means for generating pulses synchronously with substantially equal increments of said transport movement of said roll film along the length thereof; and
means for counting the number of pulses generated while said signal is being generated and controlling said drive means through comparison of the number of pulses counted with a predetermined number.
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Accused Products
Abstract
In a roll film carrier for rewinding the roll film wound on a supply reel onto a take-up reel there are provided a signal generating means which detects the rotation of the supply reel shaft and outputs a corresponding signal, a means for generating a pulse synchronously with the passage of the roll film and a means for controlling the driving of the roll film through comparison of the number of pulses generated in the signal generating period of the signal generating means with a predetermined number and it is so arranged that the driving of the roll film is stopped when the number of generated pulses has agreed with the predetermined number.
13 Citations
12 Claims
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1. A roll film carrier applicable to a reader or a reader printer, including:
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supply reel means for supplying a roll film; take-up reel means for winding up said roll film drawn from said supply reel means; means for driving said take-up reel means so as to transport said roll film from said supply reel means to said take-up reel means; means for generating signals corresponding to a predetermined rotation of said supply reel means; means for generating pulses synchronously with substantially equal increments of said transport movement of said roll film along the length thereof; and means for counting the number of pulses generated while said signal is being generated and controlling said drive means through comparison of the number of pulses counted with a predetermined number. - View Dependent Claims (2, 3)
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4. A roll film carrier applicable to a reader or a reader printer, including:
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supply reel means including a shaft for supplying a roll film; take-up reel means for winding up said roll film drawn from said supply reel means; means for driving said take-up means so as to transport said roll film from said supply means to said take-up means; means for detecting rotation of said shaft of said supply reel means and generating a signal in the period required for said supply reel shaft to rotate a predetermined number of turns or a predetermined angle; means for generating a pulse synchronously with the passage of a predetermined length of said roll film and disposed between said supply reel means and said take-up means; and control means for counting the number of pulses generated while said signal is being generated, comparing the number of pulses counted with a predetermined number and outputting a signal for controlling said drive means when both said numbers agree. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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11. A mechanism for controlling the advance of a band such as a tape or film from a rotatable reel along a predetermined path comprising:
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first means for measuring the angle of rotation of said reel; second means for measuring the length of advance of said band along said path during predetermined angular rotations of said reel; and third means for controlling the advance of said band in response to said first and second means in accordance with a predetermined relationship of the measurements thereof. - View Dependent Claims (12)
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Specification