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6109802 |
Dot line printer for preventing the overheating of printing elements by selectively activating the printing elements
In a dot line printer having a plurality of print hammers which are arranged to print a plurality of dot lines simultaneously when a hammer bank on which the print hammers are mounted performs one...
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5902056 |
Dot-matrix line printer
A dot-matrix line printer includes a printing shuttle which moves reciprocally to carry out a printing operation, and a balancing shuttle which moves in a direction opposite to the direction of the...
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5826990 |
Method and device for limiting a number of times each print hammer is driven during a predetermined period of time
To prevent effective print speed from being lowered, a counter is provided for each of a plurality of print hammers. A number of times a print hammer is driven during one print phase having a...
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5720561 |
Printer coil temperature sensor and method
A line printer having a hammerbank with hammers that are held by a permanent magnet and released by electrically driven coils. The temperature of the coils is determined by the relative resistance...
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5662421 |
Print speed controlled dot line printer depending on print density
To prevent undue elevation of temperature in a hammer assembly but to maintain the maximum printing speed, when a scheduled number of drivings at which print hammers are to be driven during one...
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5631676 |
Parallel flow water cooling system for printbars
A printbar cooling device for cooling an array of print dies substantially eliminates thermal gradients along the length of the array of print dies through use of a parallel flow cooling...
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5595446 |
Printer power supply
A printer is disclosed of the dot matrix type having a series of hammers with pins that print upon an underlying media, and which are released from magnetic retention by reversing the polarity of a...
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5310271 |
Solenoid actuator
A print head has a solenoid driving means which employs a filler mixed with a lubricating oil to fix an exciting coil to the core. The filler prevents the layer winding from being shorted due to...
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5255988 |
Printing head for use in wire impact dot printers having head cooling means
A printing head for use in a wire impact dot printer comprising a cylindrical heat radiating member, core block and nose frame. The core block is inserted into the heat radiating member and...
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5152217 |
Printer having improved hammerbank airflow
An improved hammerbank in a dot matrix line printer has two different sets of staggered apertures therein along the length thereof for drawing pressurized air at the outside of the hammerbank...
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5102245 |
Print head
A print head for a dot printer having a plurality of needles for printing by projecting the needles selectively from the print head. The print head has a solenoid base having a plurality of...
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5096313 |
Dot printer head
A dot printer head including a housing that contains electromagnets toward its back end, the electromagnets having cores positioned opposite to armatures which are supported detachably against the...
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4968160 |
Cooling device for printer head
A cooling device for a printer head includes an evaporation unit, a condenser and a refrigeration medium supply pump interconnected by conduits or tubes. The heat generated from the printer head is...
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4778297 |
Hammer coil cooling means in line printer
A cooled print hammer assembly in which a plurality of hammer coils are formed in a resin member having a recess in which is placed a cooling fin. The opened faces of the fins are placed adjacent a...
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4664542 |
Temperature control device for a printing head
A printing device operative to reduce a printing speed of a printing head to suppress a heat produced and to operate cooling means or allow the cooling ability to be higher when the printing head...
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4602881 |
Wire printing device with internal supports for thermal conduction
A ballistic type wire printing head comprises a metal front support (11) for guiding the printing wires (23) and supporting a group of actuating electromagnetic units (37, 39, 41) associated with...
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4579469 |
Cooling apparatus for dot matrix printing head
A cooling apparatus for a dot matrix impact print head suitable for application in serial printers. The print head is mounted on a carriage sliding on guide bars for reciprocating movement thereon....
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4438692 |
Printing apparatus with cooling of hammer printing coils
A printing apparatus including a plurality of drive coils for driving printing hammers arranged longitudinally in side-by-side relation at one side of a core of the U-shape. A first cooling fluid...
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4407591 |
Ballistic wire matrix print head
A wire printing head of ballistic type comprises a front guide fixed to a carriage and in which the printing wires are mounted in an axially slidable manner. The electromagnets for actuating the...
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4235555 |
Non impact dot matrix printer
A non impact dot matrix printer of the serial-parallel or parallel type having a base member extending parallel to the line of print direction on which a plurality of adjacent printing heads is...
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4135830 |
Wire printer printing head
A wire printer printing head comprises a support member, a plurality of printing elements having a print wire with a flap-armature electromagnet and a sound absorbing cover. The printing element...
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4033255 |
Print hammer actuator for dot matrix printers
An improved print hammer actuator for dot matrix printers employs a substantially closed loop magnetic path including a resilient magnetic hammer, a number of such hammers being aligned in a hammer...
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