Shuttle type line printer
AssigneesKabushiki Kaisha Yasakawa Denki, Ye Data Inc.
InventorsJuichi Tatsumi, Manabu Muto, Kenji Mori, Hajime Hayase
Life of this patent
Estimating the term…
Abstract
A mounting bed integral with a hammer bank is disposed parallel to a counter balancer composed of a counter balancer constituting member and a yoke. The mounting bed and the yoke are provided with solenoid coils opposed to a permanent magnet provided on the frame, and a pair of bearings are arranged between the mounting bed and the counter balancer constituting member. A position sensor for the mounting bed and the counter balancer is provided. A controller is provided to control a current and direction of the solenoid coil by a detection signal from the position sensor. The mounting bed integral with the hammer bank and the counter balancer are shuttle-operated in opposite directions by the controller.
Claims3
A shuttle type line printer comprising:
- a hammer bank provided with a plurality of printing hammers along printing lines;
- a counter balancer, said hammer bank and said counter balancer being laterally movably juxtaposed;
- separate electromagnetic driving devices for respectively reciprocating said hammer bank and said counter balancer in opposite directions;
- rebounding stoppers for rebounding said hammer bank and said counter balancer at respective ends of reciprocating strokes of said hammer bank and said counter balancer, and respective position sensors detecting a position for each of said hammer bank and said counter balancer, a controller having means for controlling said electromagnetic driving devices, said electromagnetic devices being separately controlled by the controlling means as a function of the position detected by said position sensors.
A shuttle type line printer having a hammer bank unit provided with a plurality of printing hammers, said hammer bank reciprocated along printing lines and a counter balancer unit reciprocated in opposite direction with respect to said hammer bank, said hammer bank and counter balancer units being separately driven, said printer comprising:
- movable type rebounding stoppers provided on opposite sides of each of said hammer bank and counter balancer units;
- a detector having means for measuring a turning position and a turning time of each of said units;
- and, a controller for said hammer bank and said counter balancer units for automatically varying a position of each of said rebounding stoppers to a proper position as a function of said turning position and turning time measured by said detector.
Dependencies are inferred from the claim text.