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6705224 |
Stamp apparatus
In a stamp apparatus, a paper-sheet object is conveyed in the arrow direction between a presser roller and an impress hub having a predetermined character/symbol string. Since a cam is rotated in...
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6474229 |
Marking device and marking method
A marking device includes a marking mechanism, a marking portion moving mechanism, and a pressure adjusting circuit. The marking mechanism marks a surface to be processed, of an object to be...
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6153074 |
Recording material for electro-coagulation printing and method for printing thereon
A recording material having a compression modulus of elasticity of 650 kgf/cm 2 or less in the direction of the thickness thereof and exhibiting a maximum strain of 0.08 or more generated under...
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6027265 |
Printer having improved print head mechanism and method
A printer having a platen for supporting a binder strip to be printed, a ribbon positioned adjacent the platen and print head mechanism having print pins, driver coils associated with each print...
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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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5302035 |
Method of driving wire-dot print head
To suppress a secondary bound of a print wire of a dot matrix printer which may occur after a single dot or continuous dots are printed and also to prevent both density variation of printed...
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5238312 |
Impact printer with printing pressure setting
For the line determined by a line feed determining portion 2 to be fed greatly, for the line determined by the line feed determining portion 2 to be fed small and further determined by a printing...
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5201876 |
Method of adjusting the impact energy of a letter key or type element of a printing machine and typewriter, printer or the like printing machine using that method
The method for determining impact energy of a type element of the printing machine includes providing at least two different-length flight paths for the type elements by changing a distance between...
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5171094 |
Printing apparatus having high impact erasing mechanism
Upon operation of an erasure key for erasing a printed character, a correction ribbon is moved in an erasure position according to rotation of a motor, and then, the motor is continuously rotated...
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5092692 |
Print pressure retrival from ascending order table
A printer has a memory containing print information on a plurality of characters, grouped by a print pressure of the character, and a control unit for controlling the print pressure in accordance...
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5046413 |
Method and apparatus for band printing with automatic home compensation
A system and method for automatically compensating for inaccuracies in the positioning of the timing mark sensor of a band line printer. A selected hammer is operated to impact a test character and...
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5044793 |
Hammer device having adjustable striking force
A hammer device generates a magnetic moving force in a magnetic member by energizing a coil, whereby a hammer strikes a recording sheet to form a record thereon by means of its moving force, the...
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5039238 |
Dot-matrix printer with impact force determination
In a dot-matrix printer including a wire-dot print head having print wires which print dots by impact on a printing medium, and a sensor for sensing the position of the print wires and generating...
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4897557 |
Electronic control system, in particular for a printer
Such electronic control systems contain safety circuits for device components endangered by excessive currents or excessive voltages, which are constructed only for a pulse operation and not for...
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4881835 |
Printer having adjustable gap between print head and recording medium
A printer including a gap changeover device for moving a print head and a platen relative to each other and thereby adjusting a head gap between the print head and a recording medium on the platen....
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4877342 |
Method of moving print elements in printheads and a printhead with moving mechanism for print elements
The invention relates to a method in printheads (1) with a plurality of print elements (4) arranged movable in relation to each other and a moving mechanism (7, 9, 11, 12, 14) with magnetic...
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4848943 |
Method and apparatus for energizing a printhead
A method and apparatus for energizing a printhead by maintaining substantially constant peak current in the actuator means of the printhead regardless of the duty cycle of the actuator means. The...
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4838157 |
Digital printhead energy control system
A digital printhead energy control system includes a first storage device for receiving hammer pulse duration data, a second storage device for receiving hammer pulse energization data and for...
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4828410 |
Serial print wheel impact printer
Disclosed is an improved serial impact printer which both prints and serrates a document. The printer includes a print wheel which is rotated to position a selected character in front of an anvil....
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4810113 |
Print head driving system
A print head driving system for driving a print head having a plurality of print wire controlling magnetic circuits and a plurality of print wires respectively operatively associated with the print...
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4806031 |
Uniform print density and registration in an impact printer
Commencing with the first print hammer(s) "out", or actuated, on each print line the hammer drive current is boosted 10% for a period, ranging from 25%=650 microseconds for single part forms to 50%...
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4797017 |
Wire dot matrix printer capable of printing letters on a plurality of superposed sheets of paper
Disclosed is a wire dot matrix printer capable of printing letters on a plurality of superposed sheets of paper, in which there is provided a drive current adjuster for continuously increasing and...
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4774882 |
Method for controlling printing impact power in impact type dot printer
A method for controlling printing impact in an impact type dot printer which controls printing impact energy to be increase in case of normal density imprint function and to be decreased in case of...
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4740094 |
Print pressure control device
There is disclosed a print pressure control device for a printer having at least two types of type wheels for printing characters, which gives different limits to a print pressure regulation switch...
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4735517 |
Printer having flux regulator
An impact printer has a flux regulator for each of the coils in its printhead. Each regulator provides a reference voltage indicative of the desired flux in the associated coil. A circuit is...
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4710040 |
Printer having constant pressure between print head and platen
A non-impact printer having a biasing mechanism which provides for constant and self-adjusting pressure between the associated print head and platen. The biasing mechanism includes a base member, a...
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4690575 |
Device for controlling printing pressure according to the kind of ink ribbon being used
A printer which operates to use selectively at least two different types of ink ribbons. The printer is characterized in that the printing pressure is varied in response to the selection of the...
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4683817 |
Dot matrix print head energy control circuit
A dot matrix print head energy control circuit (commonly known as voltage source compensation) utilizes two pulse width modulator circuits (one for receipt printing and one for forms printing). The...
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4664543 |
Device for monitoring and compensating for changes in the flight time of the print hammers of impact printers
A device for monitoring and compensating for changes in the flight time of the print hammers of impact printers is disclosed. The flight time of the respectively monitored hammer is calculated from...
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4653945 |
Rotary wheel printing apparatus with controllable hammer striking force
There is provided a printing apparatus which drives a printing wheel in response to a rotation angle data corresponding to an input character code and drives a printing hammer with an impact force...
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4644477 |
Printing apparatus
A printing apparatus having a first memory which stores as one unit 8-bit data comprising first data of 6 bits and second data of 2 bits, the first data comprising position data which correspond...
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4627344 |
Impact printer with magnetic interaction compensation
In the high speed impact printer disclosed herein, the effects of magnetic interaction between adjacent magnetic actuators is offset or compensated for by providing a programmable delay in the...
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4597328 |
Print hammer flight time control system
A hammer timing control system for the print hammers of a line printer uses a plurality of read/write RAMs in place of individual fire control circuits for controlling the firing periods of the...
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4569607 |
Printing hammer rebound control
A printing hammer rebound control system for use in impact-type printing machines is provided. The present system includes separate memory devices for storing the information of primary and its...
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4568208 |
Printer
In a printer, a printing clutch and a hammer impact changeover mechanism are controlled through a control member by one electromagnet, in such a manner that in response to a printing signal the...
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4547087 |
Microprocessor-controlled printing mechanism having an opto-electronic sensor
A plunger armature printing system incorporates an opto-electronic sensor for sensing the movement of a vane fixed to the armature of the print mechanism. The output signal generated by the sensor...
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4493253 |
Variable impact printing means
A variable impact printing mechanism includes a supporting magnetic structure having a plurality of circumferential coils mounted thereon and having a central bore in which a magnetic hammer...
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4491069 |
Printing hammer driver mechanism
A printing hammer drive mechanism for a printing apparatus, comprising a manual control member movably attached to a main frame, an electromagnet mounted on the main frame for movement relative to...
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4440079 |
Control system for timing hammers of impact printers
A hammer timing control system for a line printer has a register for storing a digital delay value related to the actual flight time of a controlled print hammer. A delay counter activated by an...
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4426165 |
Printing device with integrated print head fastening and adjustment
For use in a printing machine, such as an office typewriter, employing a replaceable printing head to be mounted on a carriage, there is provided a printing head fastening arrangement for...
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4411539 |
Print element with plural type layers of varying thickness
A print element for a printer having a multiplicity of type members arranged in a plurality of layers are supported on a support member or support members and one of said type members is brought to...
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4407193 |
Solenoid impact print hammer with uniform free flight time
In an impact printer including a print wheel having a plurality of selectable character type bearing elements for respectively printing a plurality of characters, said print wheel being rotatable...
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4404901 |
Striker assembly for line printers
A striker assembly for operating the printing hammer in a high speed impact-type line printer. The assembly is a simple, low cost unit having a minimum of components. The striker body is of...
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4389935 |
Method and apparatus for controlling a printer
A method and apparatus for controlling a printer of the type having plural print heads, each being selectively energizable to print an indicium whose relative intensity is determined by the...
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4384520 |
Device for controlling solenoids of high speed printer
In a high speed impact printer of the type arranged to impact a plurality of print hammers against given types carried by a type carrier by energizing corresponding solenoids, the energization of...
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4376411 |
Print hammer limit control
A hammer limit control for an on-the-fly line printer comprises a counter which counts compare signals from a compare circuit which detects coincidences of print data and type position data in...
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4368666 |
Method and circuit arrangement for controlling print timing in a printing apparatus
The print timing, with which a print hammer impacts a desired type moving on a type carrier, is advanced and then retarded or vice versa during test printing to find an ideal print timing. The...
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4359287 |
Impression control mechanism for a typewriter
Print impression control mechanism for regulating the impact velocity of a single element printing head against a platen. The printing head is normally retained to a rest position which is in a...
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4347786 |
Impact printer hammer flight time and velocity sensing means
In an impact printer including a print wheel having a plurality of selectable character type bearing elements for respectively printing a plurality of characters, said print wheel being rotatable...
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4333398 |
Driving force control system for impact printer
In a drive circuit for an electromagnetic printing element of a matrix impact printer, a drive pulse drives the printing element from the backstop toward a record medium to print indicia, and a...
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