EP 0318449 A3 19890726 - A METHOD AND AN ARRANGEMENT FOR CONTROLLING THE METHOD OF OPERATION OF A MATRIX PRINTER
Title (en)
A METHOD AND AN ARRANGEMENT FOR CONTROLLING THE METHOD OF OPERATION OF A MATRIX PRINTER
Publication
Application
Priority
SE 8704631 A 19871123
Abstract (en)
[origin: EP0318449A2] A matrix printer comprises a printing head which includes a plurality of printing needles (11) each having a respective electromagnetic maneuvering device (10) by means of which the needle, carried by a spring-biassed, movable armature (12), can be caused to carry out a working cycle, which includes a working stroke and a subsequent return stroke. The maneuvering device (10) is activated by temporarily lowering the magnetomotive force in the magnetic circuit (12,14) of the device from a previous, constant value. The previously attracted armature (12) will herewith commence to move in a direction away from the stationary part (14) of the magnetic circuit as a result of the spring force acting on the armature. The magnetomotive force is then caused to return to its previous value. For the purpose of reducing the noise and wear generated by the armature (12) and to reduce the tendency of the armature to rebound, the armature is slowed down during the final stage of its return stroke, by again lowering the magnetomotive force temporarily for a limited part of the time taken to effect the return stroke.
IPC 1-7
IPC 8 full level
B41J 2/30 (2006.01); B41J 9/42 (2006.01); B41J 9/44 (2006.01); G06K 15/10 (2006.01)
CPC (source: EP)
Citation (search report)
- [Y] US 4273039 A 19810616 - LUO ZONG S, et al
- [A] DE 2238605 A1 19740221 - VIERLING OSKAR
- [AP] GB 2195481 A 19880407 - CANON KK
- [A] US 4348119 A 19820907 - CARSON JR ANDREW B, et al
- [AP] US 4744684 A 19880517 - MAEKAWA TOMOHIRO [JP]
- [Y] IBM TECHNICAL DISCLOSURE BULLETIN, vol. 21, no. 11, April 1979, pages 4454-4456, New York, US; R.W. ARNOLD et al.: "Control of rebound energy in a coil-actuated hammer"
- [A] IBM TECHNICAL DISCLOSURE BULLETIN, vol. 22, no. 10, March 1980, page 4348, New York, US; A.B. HABICH: "Print hammer rebound control"
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
EP 0318449 A2 19890531; EP 0318449 A3 19890726; JP H02533 A 19900105; SE 462081 B 19900507; SE 8704631 D0 19871123; SE 8704631 L 19890524
DOCDB simple family (application)
EP 88850387 A 19881109; JP 29587188 A 19881122; SE 8704631 A 19871123