Recording medium feeding apparatus for printer
AssigneeCitizen Watch Co., Ltd.
InventorsYasuo Ohkawara, Nagao Mizutani, Toshio Kurihara, Masamitsu Nojima
Life of this patent
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Abstract
A recording medium feeding apparatus for printer is disclosed wherein a web of a recording medium is fed and taken up by a take up reel. A web feeding mechanism and a reel driving mechanism are operated through a coupling means by a spring means in which energy is stored by a common driving means.
Claims12
A recording medium feeding apparatus for a printer comprising
- (a) a frame;
- (b) a feeding mechanism comprising feed means for feeding a recording medium to the printer, a feed shaft supported by said frame, a first ratchet wheel mounted on said feed shaft, feed driving means, a first pawl engaging said feed driving means and said first ratchet wheel providing forward rotation of said first ratchet wheel and a second pawl engaging said first ratchet wheel for preventing reverse rotation of said first ratchet wheel;
- (c) a take up mechanism comprising take up means for taking-up the recording medium from the printer, a take up shaft connected to said frame, a second ratchet wheel mounted on said take up shaft, take up driving means, a third pawl engaging said take up driving means and said second ratchet wheel for providing a forward rotation of said second ratchet wheel and a fourth pawl for preventing a reverse rotation of said second ratchet wheel;
- (d) coupling means consisting of a link mechanism for coupling said feed driving means with said take up driving means;
- (e) power driving means connected to said coupling means for providing power through said coupling means to said feed driving means and said take up driving means;
- and
- (f) means for storing resilient force including a first spring means coupled to said feed driving means, and a second spring means coupled to said take up driving means whereby resilient power for application to said first and third pawls for providing rotation of said first and second ratchet wheels is stored.
A printer comprising a printing head, a printing bed opposing said printing head and movable toward and away from said printing head, means for driving said printing bed so as to resiliently hold a recording medium to be printed by said printing head at a predetermined waiting position, means for feeding said recording medium a predetermined length, feed driving means for driving said feeding means by resilient force, take up means for taking up the recording medium fed by said feeding means, take up driving means for driving said take up means by resilient force and a common power means for storing energy in said means for driving said printing bed, said feeding means and said take up driving means.
Dependencies are inferred from the claim text.