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5054942 |
Wire printing head with unitary return group
A needle or wire printing head comprises a plurality of electromagnets with fixed cores, each with two limbs, which are mounted in a ring within a containment body. Movable armatures are disposed...
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5039236 |
Print head with tapered conical return spring
A dot matrix print head has a print wire unit having a plurality of print wires, an armature unit having a plurality of armatures, each corresponding to the print wire, and an electromagnet unit...
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4882987 |
Attaching device in a spring-charged dot printer
A retaining plate for use in a spring-charged dot impact printing head has a leaf spring confronting surface which mates with the inclined surface of a support, so that mounting members which fix...
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4867059 |
Impact printer print mechanism and method of manufacture
Electromagnets and spring-damper units respectively impart forward movement and rearward movement to slider members having hammer faces at their forward ends and armatures intermediate their...
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4817522 |
Printer device
A printer device having a hammer mechanism for printingly impacting a type drum by means of hammer springs. Hammers are rotatably controlled to retracted positions where the hammers are not brought...
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4699051 |
Cooling assembly for hammer bank
A cooling apparatus for a hammer bank assembly of an impact printer. The cooling apparatus directs air onto each hammer and magnet of the hammer bank assembly and maintains the temperature...
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4602561 |
Driving mechanism for a type drum in a printer
An impact printer has a type drum, a plurality of hammers, a type drum gear secured to a shaft of the type drum, and a gear train including a drive gear and an intermediate gear engaged with the...
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4595304 |
Hammer assembly for printers
A plunger type electromagnetic hammer assembly for use with a printer including a hammer housing having a magnetic flux emitting surface. The hammer assembly includes a hammer slidably situated in...
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4557193 |
Printing device
In a printing device for printers or typewriters a hammer (11) is axially movable between a print position and a rest position. At one end the hammer has an impact surface (12) which acts upon a...
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4557192 |
Self restoring pivoting means and print hammer using same
A pivoting means for pivoting back and forth a mechanical load such as a print hammer about a given axis and within a low amplitude angle includes two elongated leaf springs. The leaf springs are...
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4490057 |
Print wire solenoid
A matrix print wire solenoid used in a wire matrix printer and including an enclosure member releasably secured to one end of the solenoid by a spring member deformed by the outer surface of the...
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4454809 |
Print hammer mechanism
A print hammer mechanism 10 includes a plurality of parallel print hammers positioned for sliding movement within slots 20a-i, 22a-i in the walls 16, 18 of a frame 12. The selective energization of...
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4429342 |
Impact printing device with an improved print hammer
An impact printing device having a plunger-type magnet system has an armature consisting of two joined portions which are a cylindrical principal portion and a guide portion which serves as the...
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4425845 |
Bank for accommodating several print ram units
Bank for accommodating adjacent ram units. Each of these consists of a flat, narrow frame. A tongue-shaped ram, driven by an electromagnetic actuator, extends in a recess of the frame. For...
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4407194 |
Print hammer
An improved print hammer incorporating crossed-spring support wires having a round cross section so as to render the hammer relatively flexible in a direction lateral to hammer travel during...
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4392423 |
Printing hammer driving apparatus
A printing hammer driving apparatus for high-speed printers comprises a lever member acting as a hammer operating part, an armature forming a part of a magnetic circuit, and an electromagnet...
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4388861 |
Bank for accommodating several print hammer units
Bank for accommodating adjacent ram units, each of which consists of a flat, narrow frame. An electromagnetic actuator for a ram, which is guided in two bores of the frame, is positioned in a...
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4386565 |
Printer apparatus using electromagnet
A printer of the needle or hammer impact type prints by release of spring-stored energy, driving the needle or hammer against a platen or character ring. A rotating cam restores the printing member...
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4362787 |
Flag strip for use in print hammers
This print hammer assembly method utilizes an elongated thin metal strip punched to form repetitive flag panels each having a flag region non-symmetrically linked to a surrounding frame, and a...
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4343239 |
Electromagnetic release mechanism for print hammers or the like
A magnet movable under the influence of magnetic edge forces is arranged between stationary magnets.The magnet is surrounded by a release coil in such a manner that the coil part contributing to...
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4327638 |
Magnetically actuated equipment
Magnetically actuated impact equipment useful for high speed printers, punches or the like, is disclosed. Actuating magnets formed of materials characterized by wide hysteresis loops such as...
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4327639 |
Print hammer assembly with multi-location impacts
A print hammer assembly is disclosed comprising a support structure having a plunger at a first location thereon, and means for movably mounting the support structure with its plunger adjacent an...
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4324497 |
Print hammer assembly with amplified multi-location impacts
A print hammer assembly is disclosed comprising a support structure having a plunger at a first location thereon, and means for movably mounting the support structure with its plunger adjacent an...
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4290356 |
Actuator mechanism for a print hammer or the like
A moving element is held without contacts in a relatively stable holding position, out of which it is released by the application of an external force. The relatively stable holding position is...
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4269118 |
Print hammer assembly method
This print hammer assembly method utilizes an elongated thin metal strip punched to form repetitive flag panels each having a flag region non-symmetrically linked to a surrounding frame, and a...
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4248148 |
Time shared shifting print hammer assembly
A plurality of print hammers are mounted on a horizontally movable carriage and adapted to scan a plurality of column positions of an impact printer. Each print hammer is provided with an...
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4239401 |
Impact printer hammer assembly
In a solenoid driven hammer for an impact printer, the armature, which is driven by the magnetic field provided by the solenoid's coil, is integral with the hammer which strikes a printing element...
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4233894 |
Print hammer mechanism having dual pole pieces
A print hammer mechanism which forms a magnetic path between the opposite fixed and free ends of an elongated resilient hammer element using a permanent magnet, a first pole piece terminating in a...
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4189997 |
Printer
A printer has a stationary electromagnet device, a hammer having a permanent magnet therein, and a resilient member coupled to the hammer. The permanent magnet may be moved upon electrical...
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4164180 |
Impact printer including hammer bank assembly
An improved hammer bank assembly includes a plurality of spaced-apart hammers, each of the hammers including a substantially planar hammer body containing an electrical coil, with each hammer body...
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4141290 |
Print hammer for type printers
Print hammer actuating apparatus of the double lever type in which one lever is moved in response to an input force and carries a pivotally mounted second lever which provides the output force...
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4109776 |
Apparatus for marking an information carrying medium
In a marking device for marking an information carrying medium, a marking tip is provided on an arm, and the arm is resiliently mounted by means of a leaf spring. In order to relieve stresses on...
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4101017 |
Matrix print head
A matrix print head comprising a plurality of electromagnets each having an associated armature; a plurality of elongated print elements having ends adapted for printing markings on a data carrier;...
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4077505 |
Printing device for calculating, accounting and similar printing machines
A dot-matrix printing device for a printing office machine, comprising a series of striking bars in the proximity of the recording medium movable transversely of the medium for printing dots in...
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4046244 |
Impact matrix print head solenoid assembly
A dot matrix impact print head uses a combination of cooperating forces produced by a deflected spring and dual electromagnetic fields to increase the striking force of a printing wire or needle...
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4022311 |
Electrodynamic actuator
An actuator, which in a preferred embodiment, is shown in a wire matrix printer, and includes a magnetic structure having a support member associated therewith. When used in a wire matrix printer,...
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4018155 |
Ballistic print hammer assembly
A ballistic print hammer assembly which includes a pivotally mounted print hammer driven by an electromagnetic actuator, characterized by low cost and ease of manufacture, high velocity and short...
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4014258 |
High speed printing apparatus
Equipment for use in a high speed line printer or the like is disclosed which includes a series of independently actuatable print hammers mounted for reciprocation in adjacent side-by-side paths....
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3983806 |
Hammer bank assembly
A hammer bank assembly useful in high speed, moving type, impact printers of the kind generally employed in data processing systems. The assembly is comprised of a mounting structure supporting a...
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3982622 |
Actuator mechanisms for wire matrix printers
A wire matrix printer includes a print head having one or more banks of a plurality of generally horizontal, vertically spaced print wires arranged parallel to each other for linear reciprocation...
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3981236 |
Printhead for impact printer
A printhead assembly, having an individual print hammer and actuator assembly for every other column of line print, includes a low mass hammer and a hairpin spring coupled to the hammer rear...
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3906854 |
Print hammer control mechanism
A printer is provided with a plurality of print hammers, each hammer being maintained in a rest position engaging a deformed elastic body by a hammer control mechanism. The hammer control mechanism...
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3902419 |
Apparatus for applying symbols to webs of photographic material or the like
A photographic copying machine wherein longitudinally spaced portions of a continuously or intermittently advancing web of photographic print material are provided with symbols which are applied...
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3822640 |
ELECTROMAGNETICALLY-ACTUATED PRINTING MECHANISM
A printing mechanism comprises a rotary print drum having around the periphery thereof a series of circumferentially spaced-apart rows of print type, a drive system for electromagnetically rotating...
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3745917 |
DIGITAL PRINTER HAMMER ASSEMBLY
A hammer assembly for use in on-the-fly type digital printers. A central block portion has top and bottom hammer retaining plates extending outwardly in overhanging fashion from said block to...
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3741113 |
HIGH ENERGY PRINT HAMMER UNIT WITH FAST SETTLE-OUT
A print hammer actuator comprises a main three-legged magnetic core having an operating winding on a middle or center leg, and an armature pivotally supported adjacent the lower leg with an...
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3735698 |
PRINT HAMMER FOR A PRINTING MACHINE
A print hammer for a printing machine, particularly for a high-speed printing machine having a rotating or translating type support, comprising an impact beam, two supporting members for supporting...
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3707122 |
PRINT HAMMER MECHANISM WITH MAGNETIC REINFORCEMENT TO CATH HAMMER
In a helical line printer having a limited number of type wheels, the type wheels and corresponding hammers are held on a fixed frame while the paper carriage is moved laterally in a repetitive...
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3673955 |
MEANS DETECTING NON-REBAILED PRINT HAMMERS TO RECYCLE THE BAILING MEANS
A printer is disclosed having a number of hammers aligned along a transverse axis which hammers are in a cocked position awaiting a print signal, means for simultaneously bailing all hammers not in...
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3673957 |
HIGH SPEED PRINTER INCLUDING CHANGEABLE CODE MEANS
There is disclosed a printer having a moving print symbol carrier with a plurality of print symbols, print hammer means selectively cooperable with the print symbols, a memory in the form of a code...
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