Printing device

  • US 5,136,937 A
  • Filed: 08/29/1991
  • Issued: 08/11/1992
  • Est. Priority Date: 08/31/1990
  • Status: Expired due to Term
First Claim
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1. A printing device in which upon insertion of a typing sheet into an insertion passage, a printer is actuated to print such data as time and serial numbers on a side portion of the typing sheet, the improvement comprising:

  • a frame plate is movably mounted on a guide shaft erected from a base for movement upward and downward, a space formed between said base and said frame plate being served as said insertion passage for the typing sheet;

    said frame being provided thereon with a printer adapted to print such data as time and serial numbers on the inserted typing sheet, a cam shaft adapted to move said printer forward and backward, and a motor for rotating said cam shaft;

    a spring disposed between said frame plate and said base in order to normally pull said frame plate toward said base side, a rubber stopper being disposed to a bottom surface of said frame plate in order to normally maintain the distance between a printer head and the surface of the typing sheet constant; and

    said cam shaft being provided on one end thereof with a cam disc which, while pressing a cam face thereof against a supporting roller disposed on said base side, is rotated to push said whole frame plate upward against a pull-force of said spring to spread the space of said insertion passage when said printer is moved forward toward a typing start position by said cam shaft, and which releases the pushing-up action exerted to said frame plate in order to lower said frame plate toward said base side when said printer, while maintaining its typing action, is moved backward toward the start position..

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