Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2007-12-04
2007-12-04
Budd, Mark (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
Reexamination Certificate
active
11007723
ABSTRACT:
A method reduces the Q factor of the resonant frequency response of a torsional oscillator system in a laser printer, where the Q factor is expressed as a function of the resonant frequency and 3 dB bandwidth of the frequency response. The frequency response of the torsional oscillator system is a function of at least a rotational inertia, a spring constant and a damping constant. The method includes the steps of decreasing the rotational inertia of the torsional oscillator system by a first factor, and decreasing the spring constant by a second factor that is substantially equal to the first factor. The method generally increases component yields, thereby reducing component costs. Also, laser printers using torsion oscillators having reduced Q factors may be used over a wider speed range. Conversely, a single laser printer model may be used at a single speed, rather than at speeds that vary due to variations in resonant frequency. The method also provides for greater freedom of movement of the operating point of the printer during printer development.
REFERENCES:
patent: 3803637 (1974-04-01), Martin et al.
patent: 4032888 (1977-06-01), Broyles et al.
patent: 4037231 (1977-07-01), Broyles et al.
patent: 4317611 (1982-03-01), Petersen
patent: 4344677 (1982-08-01), Stuermer et al.
patent: 4418567 (1983-12-01), Boning et al.
patent: 4630223 (1986-12-01), Schoon
patent: 4762994 (1988-08-01), Byerly et al.
patent: 5157650 (1992-10-01), Ozue et al.
patent: 5543956 (1996-08-01), Nakagawa et al.
patent: 5606447 (1997-02-01), Asada et al.
patent: 5629790 (1997-05-01), Neukermans et al.
patent: 5745294 (1998-04-01), Kudo
patent: 5767666 (1998-06-01), Asada et al.
patent: 5841553 (1998-11-01), Neukermans
patent: 5880765 (1999-03-01), Ueda et al.
patent: 5953103 (1999-09-01), Nakamura
patent: 5959760 (1999-09-01), Yamada et al.
patent: 6069727 (2000-05-01), Cho et al.
patent: 6285383 (2001-09-01), Klement et al.
patent: 6295154 (2001-09-01), Laor et al.
patent: 6411321 (2002-06-01), Tanimoto et al.
Texas Instruments Product Review, Multi-topology Piezoelectric Transformer Controller, Nov. 2001, p. 1-27 and page headed “Important Notice”.
Klement Martin Christopher
Pawley Daniel Eugene
Budd Mark
Lexmark International Inc.
Luedeka Neely & Graham P.C.
LandOfFree
Method and apparatus for reducing Q factor in an oscillating... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for reducing Q factor in an oscillating..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for reducing Q factor in an oscillating... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3876984