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Class Information
Number: 101/93.48
Name: Printing > Selective or progressive > Bed and platen machines > Print hammer assembly per se
Description: Apparatus comprising a member engageable with a print character member not otherwise claimed or disclosed.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
6146033 High strength metal alloys with high magnetic saturation induction and method Nov. 14, 2000
5906157 High speed impact print hammer May. 25, 1999
5787803 Dot line printer with mimimum hammer gap arrangement Aug. 4, 1998
5474393 Compact remote-driven encoder Dec. 12, 1995
5399032 Print head having replaceable print elements for wire dot-matrix printer Mar. 21, 1995
5335999 Printer hammerspring Aug. 9, 1994
5263782 Print hammer arrangement in dot line printer minimizing number of hammers simultaneously fired Nov. 23, 1993
5251555 Method and apparatus for simultaneously forming a plurality of characters on the surface of an object Oct. 12, 1993
5174671 Printing mechanism with print hammer having noise dampener Dec. 29, 1992
5104246 Striker device for printers Apr. 14, 1992
5066150 Low cost quiet impact printer Nov. 19, 1991
5031526 Lubrication system for a print hammer mechanism and assembly Jul. 16, 1991
5030023 Printing device with improved bold face printing capability Jul. 9, 1991
4944222 Printer device with noise reducing impact hammer Jul. 31, 1990
4934848 Printer head with adjustable magnetic reluctance Jun. 19, 1990
4911568 Printer Mar. 27, 1990
4896596 Lubrication system for print hammer mechanisms Jan. 30, 1990
4886380 Piezoelectric controlled electromagnetically driven printing Dec. 12, 1989
4880322 Method for rebound damping of print hammer magnets in typewriters or similar office machines Nov. 14, 1989
4874265 Impact mechanism for impact printer Oct. 17, 1989
4867584 Impact mechanism for impact printer Sep. 19, 1989
4859096 Impact mechanism for impact printer Aug. 22, 1989
4852481 Print hammer mechanism Aug. 1, 1989
4844634 Printing head for an impact printer Jul. 4, 1989
4833981 Field replaceable print hammer May. 30, 1989
4833980 High efficiency coil posts for print hammer actuators May. 30, 1989
4828410 Serial print wheel impact printer May. 9, 1989
4821614 Programmable magnetic repulsion punching apparatus Apr. 18, 1989
4817522 Printer device Apr. 4, 1989
4790674 Impact printer having wear-resistant platings on hammer springs and pole piece tips Dec. 13, 1988
4783610 Piezoelectric actuator Nov. 8, 1988
4768892 Electromagnetic hammer actuator for impact printer Sep. 6, 1988
4760785 Printer with rotating hammers Aug. 2, 1988
4759647 Dual pitch impact printer Jul. 26, 1988
4756246 Lubrication system for print hammer pivot pin Jul. 12, 1988
4741268 Planetary transmission system for selective type wheels May. 3, 1988
4737043 Impact mechanism for quiet impact printer Apr. 12, 1988
4722622 Damping apparatus for a print hammer mechanism Feb. 2, 1988
4721400 Hammer unit for printers Jan. 26, 1988
4715277 Type selection mechanism for a printer Dec. 29, 1987
4708501 Electromagnetic hammer printing device including a limited action spring force Nov. 24, 1987
4703689 Two lever print actuator with aligned pivots and energy transfer surfaces Nov. 3, 1987
4699051 Cooling assembly for hammer bank Oct. 13, 1987
4686900 Impact printer with application of oblique print force Aug. 18, 1987
4687354 Dot matrix printer head Aug. 18, 1987
4685816 Impact printer with means for adjusting the associated print hammer Aug. 11, 1987
4683820 Printing mechanism Aug. 4, 1987
4681469 Quiet impact printer Jul. 21, 1987
4678355 Print tip contact sensor for quiet impact printer Jul. 7, 1987
4675568 Mechanical amplification mechanism for electromechanical transducer Jun. 23, 1987

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