Dot printer having concentric driving cams
AssigneesKabushiki Kaisha Suwa Seikosha, Shinshu Seiki Kabushiki Kaisha
InventorsSeiji Hanaoka, Masahiko Mori, Takao Kobayashi
Life of this patent
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Abstract
In a miniature printer for printing with dots on printing paper, concentrically mounted driving cams provide both horizontal and vertical motions which synchronize the reciprocating action of the printing head mechanism with the paper feed and ink ribbon feed mechanism. Constant velocity linear motion is provided for the print head. The printing paper may be removed in either direction from the printer.
Claims29
A printer for printing sequential lines of characters on recording paper, comprising:
- a frame;
- a printing head mounted to said frame for reciprocating motion relative to said recording paper;
- first driving means for reciprocating said printing head, said first driving means including a first cam and follower whereby the velocity and position of said printing head is regulated;
- an elongated ink ribbon, said ink ribbon being interposed between said printing head and said recording paper;
- means for moving said ink ribbon transversely to the reciprocating motion of said printing head, said means for moving said ink ribbon transversely includes a second cam and follower;
- means for incrementally feeding said recording paper to said printing head for printing, said means for feeding including a third cam and follower, said first and second and third cams turning in unison about a common axis,
- whereby said paper feeding and ink ribbon moving are sychronized to a particular position of said reciprocating printing head.
A printer for printing sequential lines of characters on recording paper, comprising:
- a frame,
- a printing head mounted to said frame for reciprocating motion relative to said recording paper;
- first driving means for reciprocating said printing head, said first driving means including a first cam and follower whereby the velocity and position of said printing head is regulated;
- an elongated ink ribbon, said ink ribbon being interposed between said printing head and said recording paper;
- means for moving said ink ribbon transversely to the reciprocating motion of said printing head, said ink ribbon being divided into two portions, said means for transversely moving said ink ribbon including a second cam and follower, said first and second cams turning in unison about a common axis;
- a motor, said motor causing said first cam to rotate;
- a lever, said lever movingly connected to said printing head at one end, pivotably mounted to said frame at the other end, said first cam follower connected to said lever between said opposed ends;
- said first cam being on one side of said frame and said oscillator lever being on the other side of said frame, said first cam follower extending through said frame member for attachment to said lever and contacting engagement with said cam,
- whereby said transverse motion of said ink ribbon is sychronized to a particular postion of said reciprocating printing head and characters may be printed from either portion.
Dependencies are inferred from the claim text.