Printing apparatus for cash register
AssigneeRicoh Company, Ltd.
InventorsJyusei Matsumoto, Minoru Itoh, Chuzi Ishikawa, Yoshio Hashimoto
Life of this patent
Estimating the term…
Abstract
Printing apparatus particularly suited to a cash register includes a hammer arranged to move printing paper into engagement with type wheels located on the other side of the paper. A cam and linkage move the hammer into and out of contact with the paper. Strong springs are provided to rapidly accelerate the hammer toward the paper through an engaging plate. The engaging plate is stopped before the hammer contacts the paper, and the hammer strikes the paper due to its inertia. The hammer rebounds off the paper and is caught and held by the linkage in the rebound position between the paper and the engaging plate to prevent double printing.
Claims6
Printing apparatus comprising, in combination:
- a printing member engageable with a printing medium to perform printing;
- a mechanism for moving the printing member into and out of engagement with the printing medium, the mechanism including biasing means to resiliently urge the printing member to engage with the printing medium in a manner causing the printing member to rebound from the printing medium after engagement therewith, an engaging member being releasably disposed between the biasing means and the printing member, said engaging member being mounted for movement towards and away from said printing member, and a stopper member disposed in a position spaced from said printing member and arranged to stop movement of the engaging member before the printing member engages with the printing medium so that the printing member is accelerated toward the printing medium by the biasing means through the engaging member and the printing member continues movement due to inertia to engage with the printing medium after the engaging member is stopped by the stopper member;
- catching means operable to catch the printing member upon rebound from the printing medium and hold the printing member between a position in contact with the printing medium and a position in contact with the engaging member;
- release means engageable with the mechanism and catching means to release and reset the catching means;
- and
- a motor driven cam shaft carrying a cam, said cam being operably connected to said mechanism for initiating actuation of said mechanism, whereby rotation of said cam causes said mechanism to effect said movement of said printing member into engagement with the printing medium.
Dependencies are inferred from the claim text.