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Class Information
Number: 400/124.05
Name: Typewriting machines > Typing by other than type-face or type-die > Character formation by impact (e.g., wire matrix) > With signal conditioning > Control of drive force
Description: Subject matter wherein the input power is modified in order to change the strength of the pressure applied by the impact member against the record-medium*.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7357013 |
Marking device for encoding metallic workpieces with two-dimensional matrix codes |
Apr. 15, 2008 |
| 6835011 |
Impact dot printing head control apparatus |
Dec. 28, 2004 |
| 6801335 |
Method of controlling impact printer noise |
Oct. 5, 2004 |
| 6695495 |
Constant density printer system |
Feb. 24, 2004 |
| 6641314 |
Color thermal printer having tension roller |
Nov. 4, 2003 |
| 6543946 |
Combination printer |
Apr. 8, 2003 |
| 6540417 |
Stencil making apparatus |
Apr. 1, 2003 |
| 6530632 |
Method and apparatus for envelope printing with an ink jet printer |
Mar. 11, 2003 |
| 6254291 |
Dot-impact printing head control apparatus |
Jul. 3, 2001 |
| 6027265 |
Printer having improved print head mechanism and method |
Feb. 22, 2000 |
| 5829895 |
Method for printing an image indicative of value such as a postal indicia |
Nov. 3, 1998 |
| 5816720 |
Printer mechanism for automated teller machine |
Oct. 6, 1998 |
| 5806421 |
Method and apparatus for securely printing a machine detectable postal indicia image |
Sep. 15, 1998 |
| 5674014 |
Printhead driver circuit for line printers |
Oct. 7, 1997 |
| 5518323 |
Method of adjusting a head gap for a wire dot impact printer |
May. 21, 1996 |
| 5474391 |
Print gap setting in an impact printer |
Dec. 12, 1995 |
| 5439302 |
Self-adjusting controller for dot impact printer |
Aug. 8, 1995 |
| 5439301 |
Printer controller and method thereof for a printhead assembly |
Aug. 8, 1995 |
| 5435656 |
Back stop structure for matrix pin print head |
Jul. 25, 1995 |
| 5330277 |
Drive system for wire dot head |
Jul. 19, 1994 |
| 5302035 |
Method of driving wire-dot print head |
Apr. 12, 1994 |
| 5295750 |
Wire-dot impact printer |
Mar. 22, 1994 |
| 5071268 |
Wire-dot print head driving apparatus having sensing coils |
Dec. 10, 1991 |
| 5039238 |
Dot-matrix printer with impact force determination |
Aug. 13, 1991 |
| 5039237 |
Dot matrix print head drive method |
Aug. 13, 1991 |
| 5030020 |
Wire-dot impact printer having means for detecting displacement of individual print wires |
Jul. 9, 1991 |
| 5017027 |
Impact printer |
May. 21, 1991 |
| 4940343 |
Wire-dot print head driving apparatus |
Jul. 10, 1990 |
| 4936210 |
Arrangement of printing pins in a serial type dot printer |
Jun. 26, 1990 |
| 4877342 |
Method of moving print elements in printheads and a printhead with moving mechanism for print elements |
Oct. 31, 1989 |
| 4812062 |
Print hammer with flux detection for print pressure control |
Mar. 14, 1989 |
| 4810113 |
Print head driving system |
Mar. 7, 1989 |
| 4806031 |
Uniform print density and registration in an impact printer |
Feb. 21, 1989 |
| 4743821 |
Pulse-width-modulating feedback control of electromagnetic actuators |
May. 10, 1988 |
| 4741636 |
Dot drive circuit of wire dot type printer |
May. 3, 1988 |
| 4579467 |
Dot printer with predriving force for removing particles from dot pins |
Apr. 1, 1986 |
| 4523867 |
Bi-directional drive print wire actuator with forward-velocity and reverse-position closed loop feedback control |
Jun. 18, 1985 |
| 4396304 |
Print head and drive circuit |
Aug. 2, 1983 |
| 4348119 |
Bounce control system for moving coil printing element |
Sep. 7, 1982 |
| 4291992 |
Printer pin control circuitry |
Sep. 29, 1981 |
| 4192230 |
Printer, provided with an impact device comprising a transducer |
Mar. 11, 1980 |
| 4162858 |
Stylus printer impact energy control |
Jul. 31, 1979 |
| 4162131 |
Drive circuit for printing head |
Jul. 24, 1979 |
| 4083299 |
Electromagnetic striking members selectively actuated in time from alternating current power |
Apr. 11, 1978 |
| 4046073 |
Ultrasonic transfer printing with multi-copy, color and low audible noise capability |
Sep. 6, 1977 |
| 4027761 |
Matrix print head impact energy control |
Jun. 7, 1977 |
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