US2909996A - High speed printing mechanism - Google Patents

High speed printing mechanism Download PDF

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Publication number
US2909996A
US2909996A US639988A US63998857A US2909996A US 2909996 A US2909996 A US 2909996A US 639988 A US639988 A US 639988A US 63998857 A US63998857 A US 63998857A US 2909996 A US2909996 A US 2909996A
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Prior art keywords
printing
cylinder
character
anvil
anvils
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US639988A
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English (en)
Inventor
Clyde J Fitch
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International Business Machines Corp
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International Business Machines Corp
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Priority to BE564734D priority Critical patent/BE564734A/xx
Priority to NL224817D priority patent/NL224817A/xx
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Priority to US639988A priority patent/US2909996A/en
Priority to CH347660D priority patent/CH347660A/fr
Priority to FR1202160D priority patent/FR1202160A/fr
Priority to GB4417/58A priority patent/GB855834A/en
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Publication of US2909996A publication Critical patent/US2909996A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/23—Reproducing arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/22—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
    • B41J2/23—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
    • B41J2/27—Actuators for print wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/485—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes
    • B41J2/495—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes by selective printing from a rotating helical member

Definitions

  • A"principal object of this invention therefore, 'is to provide an improved printing mechanism for mechanically printing at relatively high speeds, in closely ⁇ spaced 'multiple columns, on a moving record medium.
  • a further object of the invention is to provide an improved printing fnechanism in 'which a plurality of closely spaced printing anvils which cooperate with a plurality of y rotating helices, are operated at relatively high printing rates by electro-adhesive clutch assemblies.
  • Another object of the invention is to provide an improved printing mechanismr including a continuously rotating shaft carrying a plurality of helically arranged printing surfaces, means for generating spaced electrical pulses corresponding to the fragmentary elements of characters to be printed, and a plurality of electrostatically operated printing anvils governed by these signals for impelling a continuously moving record medium against the helices for printing.
  • a further object of the invention is to provide an improved high speed printing mechanism.
  • lthe invention contemplates a printing mechanism in which a plurality of helically arranged printing surfaces are provided on a continuously rotating shaft, the helices being suiiicient in length to span the entire number of parallel columns to be printed.
  • the continuously rotating'helix shaft is mechanically synchronized, as by suitable gearing or timing belts, to a suitable paper feed, so that 'the record medium, such as a continuous paper form, is passed over the rotating helicesv at a constant rate with respect to the rotational speed of the helices.
  • 'the record medium such as a continuous paper form
  • the vertical vmotion yof the paper 'or record medium' past the helix shaft provides a vertical scanning. Printing.
  • a printing bar oranvil which is selectively governed to be' impelledagain'st the record medium 'and vthe helices, with suitablec'arbon backing, inked ribbon or other ink transfer material disposed between 'the record medium VVand the aliyil, or between the 'record medium andthe helices.
  • Each "of the ⁇ printing anvils is arranged -for longitudinal ⁇ rave'l toward and away from the helix shaft, wtha 'suitable ybiasing spring provided for each anvil and arranged to b ias the anvil to its normal non-printing position.
  • 'anvils are'rnov'ed through their printing strok'eby the operation of a multi-band electrostatic clutch, in which 'a plurality of 'conductive bands, one for each 'printing anvil, partially encircle a constantly 'revolving electrostaticclutch drum, with each handhaving one Aend thereof in'sulatedly attached to 'the associated printing anvil, 'and having'fhe other end attached to a light connecting spring, which serves tornan;- tain the band in position yand to establish an electrical ⁇ 'connection thereto.
  • a suitable voltage pulse is applied to create a potential difference between the band and the clutchvdr'um," an electro-adhesivo force of l@considerable magnitude is developed, so that the energized band adheres' to 'the drum 'surface and 'is carried along with the' jdrum.
  • the printing anvil isv impell'ed toward the heliX record medium, to the fo'rward'limit fof the anvil :stro-lie, determined 'either by suitable stops or by impact with the record medium backedlby the helix, in responseto voltage pulses supplied to the associated electrostatic clutch band.
  • the signals vforoperating the .printing anvils are derived from suitable signal'gehera ing means, 'synchronized with the' rotation of the helix shaft.
  • the signal generating means preferably oompfises a mgm-assolo drum either mounted Vdirectly on ⁇ thehelix shaft or synchronized for rotation therewith 'alt a 1;l ratio', with permanently ⁇ disposed magnetic intluenc'e spots or locations provided thereon inl character ⁇ syrlthesizing tracks, one Such track being provided for each character which'is to be printed.
  • the mechanism vis capable of operation at yery' 'high printing rates.
  • the use of amulti-band electrostatic clutch fas an electrically controlled actuating Vinear'ls for the printing'anvil enables a large 'number of printing positions to be provided in a small space, for example, the printed characters may be of the order of Patented Oct. 27, 1959 3 IAO inch in width or less, so that 120 printing positions would occupy 12 inches of space, including the accumulated space between printing positions, i.e., intercolumn spacing.
  • Fig. 1 is a diagrammatic isometric view of the' general assembly of a high speed printing mechanism, in accordance with a preferred embodiment of the invention.
  • Fig. 3 is a diagrammatic cross-sectional view of the portion of the apparatus shown isometrically in Fig. 2.
  • Fig. 5 is a diagrammatic sectional view of the magnetic drum, showing the disposition of the characterforming magnetic influence locations on the drum for generating the signals required to print the letter A.
  • Fig. 6 is a schematic illustration of one form of electrical control system which may be employed.
  • Fig. 7 is a schematic illustration of one suitable arrangement for the switching matrix indicated generally in Fig. 6.
  • a first and a second side frame 1 and 2 respectively, held in a suitably spaced relation by a bottom or base plate 3. Additional cross bars or separators, not shown, may be employed as desired to provide suitable rigidity and proper spacing of the side frames 1 and 2.
  • Several shafts are journaled in suitable bearings in the side frame, and may be designated as the paper or forms feed shaft 5, the helix or printing cylinder shaft 6, and the clutch drum or rotor shaft 7.
  • the paper feed shaft 5 and the helix shaft 6 are mechanically connected by the gear 8 and pinion 9, as shown, so that the paper feed shaft rotates at a selected integral sub-multiple of the number of revolutions of the helix shaft 6, for purposes to be explained subsequently.
  • a suitable pulley and belt arrangement may be employed to mechanically synchronize the shafts 5 and 6. It will be noted that shafts S and 6 are counterrotating, as indicated by the directional arrows on gear 8 and pinion 9.
  • Suitable driving means such as the motor 11, directly connected to one end of shaft 6, is provided to drive the shafts 5 and 6 at substantially constant rotational speeds, but other mechanical driving arrangements may be employed, as will be apparent to those skilled in the art.
  • the drum may be mounted on a separate shaft, mechanically synchronized with shaft 6, the preferable arrangement is to mount the drum on shaft 6, as shown in the drawings, thereby insuring accurate and continuous synchronization of the drum speed and helix shaft speed.
  • a plurality of magnetic sensing heads 15 are associated with the drum, in a manner and for purposes which will be subsequently explained.
  • a printing cylinder 17 having a plurality of helical surfaces 18 thereon, which may be obtained, for example, by winding high strength steel wire, e.g., music wire, in grooves cut in the surface of the cylinder, withl the ends of the wire anchored n the castellated ends of cylinder 17.
  • high strength steel wire e.g., music wire
  • a cylindrical rotor 21 comprising a hub or spider portion 22 of conductive material, having thereon an outer layer 23 of semiconductive material, which may consist of material compounded and manufactured as explained in a copending application for Letters Patent of the United States, Serial Number 630,319, tiled on December 24, 1956, for Electro-Adhesive Materials and Method of Manufacture, and assigned to the present assignee.
  • material of this type in combination with conductive material, forms an excellent electro-adhesive combination.
  • Shaft 7 and rotor 21 are rotated at a substantially constant and relatively high speed by suitable driving means, such as a motor 25, in the direction indicated bythe arrow.
  • a printing anvil assembly including a plurality of printing anvils 27, which are carried in front and rear guide bar assemblies 28 and 30 respectively, so that the printing anvils can be moved toward and away from the record medium and printing cylinder.
  • a plurality of biasing springs 32 are carried by a spring mounting bar assembly 33, so that the lower ends of springs 32 are operatively connected to printing anvils 27 to bias them to a normal position away from the record medium and printing cylinder.
  • Each of the printing anvils 27 has associated therewith a clutch band 3S, one end of which is attached to, but insulated from, the printing anvil, as by use of a suitable insulating cement.
  • the other end of each clutch band is resiliently connected to an anchor point, as by the wire springs 37, which have a hooked end engaging thc lower ends of bands 35, and which are anchored in a suitable spring support 39, formed of insulating material and extending from one side frame to the other.
  • Suitable electrical terminations are provided for each of the connector springs 37, for purposes to be described subsequently.
  • Fig. 2 of the drawings illustrates in detail the relationships of the printing anvils and their associated clutch bands, biasing and connecting springs, with respect to the printing cylinder and clutch rotor.
  • the biasing springs 32 may comprise a plurality of projections from a common strip of suitable spring material, formed in a comb-like fashion.
  • the springs 32 are prestressed so that their lower ends engage one vertical face of projections 45 on the printing anvils 27, the opposite face of these projections engaging the cap bar 29 of the front guide bar assembly 28 to act as a back stop, thus defining the normal or non-printing positions of the anvils 27.
  • the manner in which the front and rear guide bar assemblies 28 and 30 are slotted to act as guides for the printing anvils A2 7 is apparent from this drawing.
  • the clutch bands 35 are show n in Fig. V2, as attached to the printing anvils by a thin layer of insulating cement, so that they are enabled to' transmit driving force to the printing anvils but are electrically insulated therefrom.
  • the bands are shown as having'substantially 90 degrees of wrap -around the Lclutch rotor. "ihe other ends of bands 3,5 have small holes or openings punched or other- Wiso formed therein', with the hooked ends of Springs 37 passing therethrough.
  • the springs 37 are anchored in any suitable manner to the bar 39, .of insulating material, Suoh as by tho'thtoadod studs 47., and the damping pieces 49, which not only serve to hold the springs in place but also provide a means for making separate electrical connections to each of the springs 37 and hence the clutch bar-lds 3.5.
  • Eig. 3 further illustrates the relationship of the parts described in detail in Fig. 2, and particularly shows the alignment of the printing anvils 27 with the axis of the printing cylinder 17.
  • the manner in which the projections 45 on printing anvils 27 act as back stops and engaging points for biasing springs 32 is clearly seen in this drawing.
  • the manner in which, for each spring 37, a wire 5.1, provided with -a suitable tapered plug, is engaged with stud 47 to provide an electrical connection is manifest from the drawing.
  • the printing anvil is pulled to the right, as viewed in the drawing, forcing the record medium against the helical surface of the printing cylinder to ⁇ cause a printing impression.
  • the printing anvil is stopped by the/record medium and the helical surface of the printing cylinder, although a forward motion stop similar to the back stop 45 may be provided if desired.
  • the clutch band then slips uponV the surface of the clutch rotor until the termination of the voltage pulse, if it is still in effect, whereupon the biasing spring restores the anvil to its normal position.
  • FIG 3 also shows the manner in which the wicking 42 in reservoir 41 wipes on the surface of the clutch rotor to provide a clean lubricated surface.
  • Vtheparts are their such that high operating speeds and close columnar spacing are readily achieved.
  • the only parts subject to acceleration and deceleration during printing operations are the printing anvils, clutch bands and associated'springzs, and these maybe made' relativelyv small and'light in weight, so that they may be operated rapidly.
  • the rotating parts rotate at substantially constant velocity'during"printing, hence no large decelerating or accelera-'ting forces are required, and relatively small driving motors' may'beusedl 'The 6 use of. narrow olutoh hands in a multi-band electro-adhesivo clutch enables vorytsmall spacings to be. obtained for the printing positions. a feat not readily accomplished with ani/'other' typo' .of yhighy speed 'electromechanical transducer.
  • nine horizontal scans are providedin the disclosed ernbodirnent ofthe invention, sinceeach of the nine helixes Provides a horizontal scan, at eachA and every' Column position. Since the paper -is also moving vertically, the equivalent of vertical scanning is also provided, by causing the record medium to advance through one vertical character space plus Vertical margin'for each yrevolution of the printing cylinder. Only seven of the nine horizontal scans are employed for printing, the remaining two occurring during the vertical spacing between rows of printed characters on the record medium.
  • a row of one or more dots or impressions may be made during any one of the horizontal printing scans, and by proportioning and arranging the spacing of the helices vwith respect to the width of the printing anvils, similar scans occur concurrently at all printing positions.
  • FIG. 4 An example of the manner in which a character may be built up* by operation of a printing anvil at various times during one revolution of the printing cylinder is illustrated in Fig. 4.
  • the successive horizontal scans of the nine helix wires on the printing cylinder passing each of the printing anvils occur in successions from top to bottom, since the paper is continuously moving upward, and are designated by the reference characters S1 through S9, respectively.
  • the printing anvil is operated, imprinting a dot designated by reference lcharacter A11; on the second scan S2, two spaced dots designated A21 and A22 are created by two strokes of the printing anvil; on scan S3, dots A31 and A32 are imprinted; and so on for all seven of the printing scans, the first digit of the reference character for each dot indicating the number of the scan during which printing occurs, and the second digit indicating the order of printing Within the scan.
  • the letter A is thus created by the successive dot printing on the successive scans.
  • a character-forming signal track is provided for each character which may be printed, for/example if the nurnber lof possible characters to be printed' comprises twentysix alphabetic, ten' numeric, andftwelve special characters such as punctuation marks, dollar sign, then a tot'alv of forty-eight character signal tracks are provided on the drum.
  • Each track is provided with a plurality of positions or locations which are effective to produce a voltage pulse in the sensing head 15 associated with the track as the positions or locations pass by the sensing head.
  • Fig. shows the distribution of the magnetic influence locations for the character track which provides signals for generating the letter A.
  • the drum is shown at the start of a scanning cycle, the reference point being an air gap 5S of sensing head 15.
  • the first magnetic influence location to pass air gap 58 is designated by reference character ⁇ M11, indicatingthat it is the first magnetic influence provided during the first horizontal scan (S1 of Fig. 4).
  • M21 and M22 are the first and second magnetic inuences occurring during the second scan S2 of Fig. 4, and so forth for the remaining scans.
  • Fig. 6 is a schematic illustration of suitable circuitry for governing the supply of character-forming signals from the drum heads to selected ones of the electroadliesive clutch bands in response to input data.
  • the character-forming signals in the form of voltage pulses generated in sequences as previously described, are supplied from the sensing heads 15 over lines 101 to suitable amplifiers, indicated generally by the rectangle 102, which may be conventional pulse amplifiers, and which function to amplify the relatively Weak signals generated by the sensing heads to a voltage and power level sufficient for the necessary switching of the signals with the input data.
  • the amplified character-forming signals are supplied over lines 104 to a first set of input circuits of a switching matrix, designated generally by the labeled rectangle 105.
  • a second set of input circuits for the matrix 105 is connected to the input data channels, designated generally by reference character 107.
  • the input data is in the form of electrical pulses present on input signal lines, a plurality of such lines comprising each of the input channels.
  • One such channel is provided for each column position in the printing mechanism, e.g., 120 input data channels for 120 columns of printing.
  • Input data to be printed in any particular row is presented simultaneously by al! input data channels representing the columns in the row which are to have a character printed therein, by simultaneous existence of signals on one or more input signal lines in each of the channels.
  • Such an arrangement for handling data is known in the art as a parallelparallel arrangement. Although other arrangements may be designated to operate with this printing mechanism, the parallel-parallel system affords ⁇ the highest speed and relatively simple circuitry, even though a relatively large amount of electrical or electronic components are required.
  • the outputs of the switching' circuits in switching matrix are supplied to a plurality of output lines 108, of which there is one for each column position in the printing mechanism.
  • 'Ihese output lines are connected to the inputs of a corresponding number of driver stages, indicated generally by the labeled rectangle 110, and which may be any suitable type of amplifier which provides an output suicient for proper energization of the electro-adhesive clutch bands 27, which, as shown by the drawings, are connected to the outputs of the drivers by lines 111.
  • the electrical connections to the bands may be most readily made as described in connection with Figs. 2 and 3, but in Fig. 6, the connections are illustrated schematically for the sake of clarity.
  • each of the character-forming tracks on drum 13 causes the generation of character-forming signals by sensing heads 15, which are amplified and supplied to the first set of inputs of the switching matrix 10S via lines 101, amplifiers 102, and lines 104. Accordingly, the necessary character-forming signals for forming each and every character which it may be desired to print are supplied to the one input of the switching matrix during each and every revolution of the printing cylinder.
  • a separate track may be used on the drum to supply pulses to appropriate synchronizing circuits, illustrated generally by the labeled rectangle 112.
  • Fig. 7 shows a partial schematic diagram of the manner in which the matrix 105 may be embodied, using conventional diode logic circuits.
  • a triangle represents, symbolically, two or more diodes arranged to function as a logical And circuit, or coincidence circuit. These circuits are constructed and arranged so that, when and only when input signals are simultaneously present at all of the inputs represented by the cocasse f lines entering the base of the triangle, Will an output signalbe provided at the output, shown symbolically as leaving the apex of the triangle.
  • a logical Orcircuit, or mixer circuit is represented by a plano-convex or half-moon* symbol fon the drawings, and is constructed and arranged so .that a signal present on any one of the input lines, entering the base of the symbol, will provide'a'n output signal at the output, indicated symbolically ⁇ by the line leaving the curved side of the symbol.
  • An input data channel 167 is shown as comprising seven'individu'al input signal lines designated by reference character 113, and the combinations of signals existing on these linesat any onetime may be used to designate theV various characters to be printed in the first column position. More or less channels may be employed depending upon the coding system, and the subject invention isY not limited to use with any ⁇ pa'ryticular arrangement.
  • the input channel is translated by means of a translator 115, which may take any one of a number of well-known forms, and is eifective to translate the incoming data signals in the associated channel to a voltage on one of a plurality of input character signal lines, vone for each character represented by the incoming data.
  • a translator 115 which may take any one of a number of well-known forms, and is eifective to translate the incoming data signals in the associated channel to a voltage on one of a plurality of input character signal lines, vone for each character represented by the incoming data.
  • Six such lines are illustrated in Fig. 7, designated by reference characters 117, 118, 119, 120, 121 and 122 respectively, and .representing the characters A, B, C, 0, l and 9 respectively, supplied as input data.
  • a printing mechanism constructed in accordance with this invention is capable of operation at relatively high printing speeds, and with relatively close columnar spacing, with a small light-weight movable printing anvil or bar provided for each position, which with-its associated parts, are capable of very high operating speeds.
  • a printing cylinder having a plurality of helical printing surfaces thereon, at least one printing anvil disposed for movement toward and away from said cylinder, means for normally biasing said anvil away from said cylinder, a rotor of electro-adhesive material disposed adjacent said printing cylinder and coextensive therewith, a band of conductive material, one for each of said printing anvils, having one end attached to the printing anvil and having the other end resiliently connected to an anchor point, the band encircling at least a portion of the periphery of said rotor, so that said printinganvil is impelled towardsaid cylinder t print on a record medium disposed between Said anvil and said cylinder r.
  • Va voltage pulse' establishes a potential difference between said rotor and said band
  • fnd means for selectively energizing .said bands in accordance with the characters to be printed.
  • a printing ,cylinder havillg l Plurality of helical printing surfaces thereon, at least one printing anvil disposed for movement toward ,and away from said'cylinder, means 4for normallybilasing vSaid all' vil away from said cylinder, a' rotor of electro-adhesive material disposed adjacent saidrprinting cylinder and c9- extensive therewith, ia band of conductive material, .011e for each of said printing anvils, having one end attached to the printing anvil and having .the other .end resiliently connected to an anchor point, the band encircling atleast a portion of the periphery of said rotor, so that saidnrinting anvil is irnpelled toward said cylinder'to print on a record medium disposed between lsaid anvil and ,said cylinder when a voltage pulse establishes' a potential difference between said rotor and said band, vmeans for generating character-forming 'sign
  • a printing cylinder having a yplurality of helical printing 'surfaces thereon, at least one printing anvil disposed for movement toward and away from said cylinder, means for normally biasing said -anvil away from'said cylinder, a rotor of electro-adhesive material disposed adjacent said printing cylinder and coextensivc therewith, a vband of lconductive material, one for each of said printing anvils, having one end attached 'to .the printing anvil 'and having'the other end resiliently inder, a plurality of magnetic signal tracks carried .
  • said magnetizable means' one such track being provided foreach character which is to be printed, permanently existing magnetic influence positions disposed on each track Arepresenting character-forming signals required ⁇ to form the character for that track, a ⁇ sensing 'head for each track effective to generate character-forming voltagevimpulses in response' to said magnetic influence position, and means for utilizing said voltage impulses to energize said bands to thereby selectively print said"cl:taracters'.A
  • a printing cylinder having a vplurality of helical'printing surfaces'thereon, atleast one printing anvil disposed for movement toward and away from said cylinder, means for normally biasing said anvil away from said cylinder, a rotor of electro-adhesive material disposed adjacent said printing cylinder and coextensive therewith, a band of conductive material, one for each of said printing anvils, having one end attached to the printing anvil and having the other en'd resiliently vconnected to an anchor point, the band encircling at'least a portion of the periphery of said rotor, so thatsaid printing anvil is impelled'toward said cylinder to print on alrecord medium disposed between said anvil and said cylinder when a voltage pulse establishes a potential difference between said rotor ⁇ and said band, and signal generating means for selectively energizing said bands'vin accordance'with the characters to ,be printed, said signal generating ⁇ '
  • each character which is to be printed permanently existing magnetic inuence positions disposed on each track representing character-forming signals required to form the character for that track, a sensing head for each track etective to generate character-forming voltage impulses Vin response to said magnetic influence position, an input vprinting anvil disposed for movement toward and Vaway from said cylinder, means for normally biasing said anvil away from said cylinder, a rotor Aof electro-adhesive material disposed adjacent said printing cylinder and co-extensive therewith, a band of conductive material, one for each of said printing anvils, having one end attached to the printing anvil and having the other end resiliently connected to an anchor point, the band encircling at least a portion of the periphery of said rotor, so that said printing anvil is impelled toward said cylinder to print on a record medium disposed between said anvil and said cylinder when a voltage pulse establishes a potential difference between said rotor and said band, and signal generating means for selective
  • a printing cylinder having a plurality of helical printing surfaces thereon, at least one printing anvil disposed for movement toward and away from said cylinder, means for normally biasing said anvil away from said cylinder, a rotor of electro-adhesive material disposed adjacent said printing cylinder and co-extensive therewith, a band of conductive material, one for each of said printing anvils, having one end attached to the printing anvil and having the other end resiliently connected to an anchor point, the band encircling at least a portion of the periphery of said rotor, so that said printing anvil is impelled toward said cylinder to print on a record medium disposed between said anvil and said cylinder when a voltage pulse establishes a potential diterence between said rotor and said band, and signal generating means for selectively energizing said bands in accordance with the characters to be printed, said signal generating means comprising magnetizable means arranged for rotation in synchronism with said printing cylinder,
  • a sensing head for each track eiiective to generate character-forming voltage impulses in response to said magnetic inuence position, an input data channel carrying electrical input signals representing the characters to be printed, one such channel being provided for each column to be printed, a plurality of character signal lines, one associated with each of said sensing heads and carrying character-forming voltage pulses, and a switching matrix having first and second inputs connected to said character signal lines and said input data channels, respectively, and a plurality of outputs, one for each of said bands, and means for combining the signals supplied to said first and second inputs to supply signals to said outputs for selectively energizing said bands to print selected characters in selected columns in accordance with said input data signals.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Fax Reproducing Arrangements (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
US639988A 1957-02-13 1957-02-13 High speed printing mechanism Expired - Lifetime US2909996A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BE564734D BE564734A (hu) 1957-02-13
NL224817D NL224817A (hu) 1957-02-13
US639988A US2909996A (en) 1957-02-13 1957-02-13 High speed printing mechanism
CH347660D CH347660A (fr) 1957-02-13 1958-02-07 Mécanisme d'impression
FR1202160D FR1202160A (fr) 1957-02-13 1958-02-10 Mécanisme d'impression rapide
GB4417/58A GB855834A (en) 1957-02-13 1958-02-11 Improvements in or relating to printing mechanisms

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US639988A US2909996A (en) 1957-02-13 1957-02-13 High speed printing mechanism

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US2909996A true US2909996A (en) 1959-10-27

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US639988A Expired - Lifetime US2909996A (en) 1957-02-13 1957-02-13 High speed printing mechanism

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US (1) US2909996A (hu)
BE (1) BE564734A (hu)
CH (1) CH347660A (hu)
FR (1) FR1202160A (hu)
GB (1) GB855834A (hu)
NL (1) NL224817A (hu)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3087420A (en) * 1959-11-19 1963-04-30 Ibm Ultra speed printer
US3192854A (en) * 1963-03-27 1965-07-06 Ibm Printer control system
US3236351A (en) * 1961-12-05 1966-02-22 Ibm High speed matrix printer
US3286625A (en) * 1962-11-12 1966-11-22 Ier Impression Enregistrement Recording instruments
US3302557A (en) * 1964-05-29 1967-02-07 Ibm Lubrication of print wires
US3317017A (en) * 1965-08-06 1967-05-02 Rca Corp Printer with rolling anvil member
US3322252A (en) * 1965-08-06 1967-05-30 Rca Corp Side member structure for print head
US3357533A (en) * 1965-08-06 1967-12-12 Rca Corp Printer having print bars with zigzag struts out of phase
US3444975A (en) * 1963-03-20 1969-05-20 Rca Corp Printer with print bars supported by parallelogram linkage arrangement
US3647356A (en) * 1970-02-13 1972-03-07 Motorola Inc Printer drive with page record feed
US3782278A (en) * 1970-12-11 1974-01-01 Tally Corp Impact line printer
US3834304A (en) * 1970-05-21 1974-09-10 Potter Instrument Co Inc Helical bar printer and hammer therefor
US4393769A (en) * 1980-12-31 1983-07-19 International Business Machines Corporation Electrostatic clutch-operated printing mechanism

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US1405722A (en) * 1919-12-05 1922-02-07 Krupp Ag Typewriter mechanism
US1781793A (en) * 1927-08-16 1930-11-18 Harry E Spencer Weight-printing mechanism for scales
US2053063A (en) * 1934-05-18 1936-09-01 Ibm Record controlled printing device
US2694362A (en) * 1951-08-25 1954-11-16 Remington Rand Inc High-speed dot printer
US2757605A (en) * 1954-04-28 1956-08-07 Potter Instrument Co Inc Multiple sequency type wheel printer
US2776618A (en) * 1953-06-11 1957-01-08 Hughes Aircraft Co Printing cylinders for high-speed printing systems
US2787210A (en) * 1953-01-22 1957-04-02 Jr Francis H Shepard Hammer impelling means in high speed printers
US2800073A (en) * 1954-12-17 1957-07-23 Hughes Aircraft Co High speed paper advance system
US2811102A (en) * 1951-06-07 1957-10-29 Sperry Rand Corp Random printing means

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1405722A (en) * 1919-12-05 1922-02-07 Krupp Ag Typewriter mechanism
US1781793A (en) * 1927-08-16 1930-11-18 Harry E Spencer Weight-printing mechanism for scales
US2053063A (en) * 1934-05-18 1936-09-01 Ibm Record controlled printing device
US2811102A (en) * 1951-06-07 1957-10-29 Sperry Rand Corp Random printing means
US2694362A (en) * 1951-08-25 1954-11-16 Remington Rand Inc High-speed dot printer
US2787210A (en) * 1953-01-22 1957-04-02 Jr Francis H Shepard Hammer impelling means in high speed printers
US2776618A (en) * 1953-06-11 1957-01-08 Hughes Aircraft Co Printing cylinders for high-speed printing systems
US2757605A (en) * 1954-04-28 1956-08-07 Potter Instrument Co Inc Multiple sequency type wheel printer
US2800073A (en) * 1954-12-17 1957-07-23 Hughes Aircraft Co High speed paper advance system

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3087420A (en) * 1959-11-19 1963-04-30 Ibm Ultra speed printer
US3236351A (en) * 1961-12-05 1966-02-22 Ibm High speed matrix printer
US3286625A (en) * 1962-11-12 1966-11-22 Ier Impression Enregistrement Recording instruments
US3444975A (en) * 1963-03-20 1969-05-20 Rca Corp Printer with print bars supported by parallelogram linkage arrangement
DE1283577B (de) * 1963-03-27 1968-11-21 Ibm Punktzeitsteuerung fuer ein Punktmatrix-Druckwerk
US3192854A (en) * 1963-03-27 1965-07-06 Ibm Printer control system
US3302557A (en) * 1964-05-29 1967-02-07 Ibm Lubrication of print wires
US3317017A (en) * 1965-08-06 1967-05-02 Rca Corp Printer with rolling anvil member
US3322252A (en) * 1965-08-06 1967-05-30 Rca Corp Side member structure for print head
US3357533A (en) * 1965-08-06 1967-12-12 Rca Corp Printer having print bars with zigzag struts out of phase
US3647356A (en) * 1970-02-13 1972-03-07 Motorola Inc Printer drive with page record feed
US3834304A (en) * 1970-05-21 1974-09-10 Potter Instrument Co Inc Helical bar printer and hammer therefor
US3782278A (en) * 1970-12-11 1974-01-01 Tally Corp Impact line printer
US4393769A (en) * 1980-12-31 1983-07-19 International Business Machines Corporation Electrostatic clutch-operated printing mechanism

Also Published As

Publication number Publication date
BE564734A (hu)
GB855834A (en) 1960-12-07
NL224817A (hu)
CH347660A (fr) 1960-07-15
FR1202160A (fr) 1960-01-08

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