Scott D Phillips - Kent WA, US Joel C Brown - Renton WA, US Craig J Cornelius - Woodinville WA, US Kenneth R Hallock - Buckley WA, US Daniel A Durland - Seattle WA, US Gary A Gesellchen - Seattle WA, US Christopher J Bakken - Auburn WA, US
Assignee:
TallyGenicom LP - Kent WA
International Classification:
B41J 11/20
US Classification:
400 56, 400 55, 347 8
Abstract:
Methods for setting the print gap in a printer are disclosed. The printer has an eccentric platen wherein rotation of the platen changes the print gap distance. A driver controls the eccentric platen rotation, and a sensor may be used to determine the position of the motor and platen. The configuration of an eccentric platen and a driver having a position sensor enables measuring the thickness of a form at one or more locations to create a representative thickness profile of the form, which may be saved to the printer's computer memory and repeated when printing similar forms in the future, thus obviating the need to measure the thickness of every individual form.
Preloaded Stabilizer Mechanism In A Dot Matrix Printer
Craig J. Cornelius - Woodinville WA Daniel A. Durland - Seattle WA
Assignee:
Tally Printer Corporation - Kent WA
International Classification:
B41J 1902
US Classification:
400283, 400341, 267136, 267137
Abstract:
A preloaded stabilizer mechanism in a dot matrix line printer having a reciprocating carriage is provided to: (1) establish a rigid reference point that prevents the print line of the dot matrix line printer from drifting; (2) eliminate backlash; and, (3) create a carriage resonance frequency that is greater than the carriage operating frequency to enhance printer system stability and the reduction of vibration. The stabilizer mechanism is mounted on a support frame of the dot matrix line printer and includes a modified c-shaped bracket member and a spring plate. The spring plate is attached to one end of the bracket member to form a slot. The slot of the stabilizer mechanism receives an offset shaft that is coupled to a shuttle mechanism that provides the carriage with reciprocating motion. The spring plate of the stabilizer mechanism, being slightly deflected, imposes a force against the offset shaft. As the carriage is reciprocated back and forth along its line of movement, the offset shaft moves back and forth along a line that lies parallel to the carriage movement line.
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