The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 13, 1983
Filed:
Dec. 23, 1981
Yasuhiko Iwane, Tamayama, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A serial printer of the type in which a column shift of a carriage carrying a type wheel is effected through a mutual engagement between the rack and the screw member. A first and a second screw members are splined to a common shaft adapted to be driven by a suitable power source. The first and second screw members are rotatably carried by a first and a second carriages having reset positions defined at opposite ends of the printer. The first and the second screw members have screw threads inclined in opposite directions and adapted to mesh with the teeth of a common rack which is slidable over a predetermined stroke in the column-shift direction and adapted to be driven by a suitable driving member. By making the type wheels rotate by a number greater than that required for ordinary type selecting operation, the rack is slided by the driving member to selectively engage one of the first and second screw members thereby to shift the selected one of carriages.