High speed impact print hammer

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5906157
SERIAL NO

09073883

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ATTORNEY / AGENT: (SPONSORED)

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    Expired
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Abstract

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An impact hammer assembly for a high speed printer includes first and second permanent magnets having opposite poles disposed adjacent to each other and having a gap therebetween. The magnets create flux lines extending across the gap. A print hammer includes a hammer beam and a hammer head. The print hammer is movable between a rest position and a print position. The hammer beam is disposed in the gap between the first and second magnets. A coil is disposed on the hammer beam and perpendicular to the magnetic flux lines. Circuitry generates a current in the coil and controls the direction of current flow in the coil, such that when current flows in the coil in a first direction, the print hammer moves towards the print position and when current flows in the coil in a second direction, opposite to the first direction, the print hammer moves towards the rest position.

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Patent Owner(s)

Patent OwnerAddress
BANCTEC INC A CORP OF DELAWARE4851 LBJ FREEWAY DALLAS TX 75082

International Classification(s)

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  • 1998 Application Filing Year
  • B41J Class
  • 1686 Applications Filed
  • 945 Patents Issued To-Date
  • 56.05 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances19981999200020012002200320042005200620070255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Mazumder, Ali T Oklahoma City, OK 13 187

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Patent Citation Ranking

  • 1 Citation Count
  • B41J Class
  • 1.81 % this patent is cited more than
  • 26 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges6219741872211101 - 1011 - 2021 - 3031 - 4041 - 5051 - 6061 - 7081 - 90100 +0102030405060708090100110120130140150160170180190200210220230

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