Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light
Patent
1996-08-16
1998-09-22
Berhane, Adolf
Incremental printing of symbolic information
Light or beam marking apparatus or processes
Scan of light
G01D 1510
Patent
active
058121838
ABSTRACT:
A control system used in a printer drive train of the type having a driving gear in meshed engagement with a driven gear so that, upon rotation of the driving gear in a first direction, the driven gear is rotated by the driving gear in a second direction opposite the first direction. The control system includes a first gear in meshed engagement with the driving gear for rotation thereby in the second direction, a second gear in meshed engagement with the first gear for rotation thereby in the first direction, and a coupling mechanism operative between the driven gear in the drive train and the second gear in the control system for selectively transmitting at least a part of the rotational force of the second gear to the driven gear. Any velocity perturbations transmitted down the drive train to the driven gear are inverted and fed back into the drive train through the control system to actively attenuate the velocity perturbations in the driven gear.
REFERENCES:
patent: 5376954 (1994-12-01), Kerr
patent: 5428371 (1995-06-01), Fox et al.
patent: 5430477 (1995-07-01), Bachmann et al.
patent: 5462371 (1995-10-01), Beretta et al.
Berhane Adolf
Hewlett--Packard Company
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