US3788214A - Printing apparatus for business machines - Google Patents

Printing apparatus for business machines Download PDF

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Publication number
US3788214A
US3788214A US00252015A US3788214DA US3788214A US 3788214 A US3788214 A US 3788214A US 00252015 A US00252015 A US 00252015A US 3788214D A US3788214D A US 3788214DA US 3788214 A US3788214 A US 3788214A
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United States
Prior art keywords
printing
sheet
areas
type faces
line
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US00252015A
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English (en)
Inventor
D Folkens
R Moritz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Olympia Werke AG
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Olympia Werke AG
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J1/00Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies
    • B41J1/22Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies mounted on carriers rotatable for selection
    • B41J1/32Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies mounted on carriers rotatable for selection the plane of the type or die face being parallel to the axis of rotation, e.g. with type on the periphery of cylindrical carriers
    • B41J1/44Carriers stationary for impression
    • B41J1/46Types or dies fixed on wheel, drum, cylinder, or like carriers
    • B41J1/48Types or dies fixed on wheel, drum, cylinder, or like carriers with a plurality of carriers, one for each character space
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00Actions or mechanisms not otherwise provided for
    • B41J25/32Impression mechanisms in which a roller co-operates with stationary type-faces

Definitions

  • ABSTRACT A printing apparatus for typewriters, calculators, and like business machines in which the resilient prongs of a comb shaped printing plate are operated to slide in frictional contact in slightly resiliently deformed condition over areas of pressure responsive sheets covering printing type faces so that imprints are made.
  • the sheet means may include an ink ribbon, a paper sheet, and a stationary foil on which the resilient prongs slide while holding the ink ribbon on the papers sheet, and the paper sheet on the type face, or other pressure responsive imprint forming sheets may be used.
  • the present invention is concerned with a printing apparatus for business machines, which is particularly suited for printing entire lines formed by printing types. It is known to press a pressure member against a pressure responsive imprint forming sheet means covering a line of types, in perpendicular direction against the type faces of the line of types.
  • the pressure member has a curved pressure edge which is rolled over a pressure responsive imprint forming sheet means from one end of a line of types to the other end.
  • This apparatus makes uneven imprints, particularly when the line of types is formed by a plurality of printing wheels which are turnable between digital positions. Due to unavoidable tolerances between the diameters of the individual printing wheels, it is hardly possible to obtain a perfect imprint.
  • the type of a projecting type wheel deforms the rubber and deeply enters into the same so that also the sheet and an ink ribbon are substantially deformed. A deformation of the paper sheet by a bulge cannot be avoided by the elastic rubber cover, and it is not possible to obtain a precisely uniform appearance of the printed characters.
  • a hard rubber is used for covering the pressure edge, the distance which is rubber will yield is substantially reduced so that the curved pressure edge is mainly supported on the projecting types, so that not so far projecting types of other printing wheels produce weaker imprints.
  • Another disadvantage of the prior art is that, irrespective of the fact that the moving masses are small, a high amount of energy is required for printing, particularly if a transfer magnet ink ribbon is used. Due to the fact that the pressure of the curved pressure edge is perpendicular to the type faces, the pressure must be sufficient to press the sheet means simultaneously against the entire character forming the type face of the types against which the sheet means is pressed.
  • the ink is transferred by a high pressure, and the ink ribbon, the paper, and other sheets have to be compressed by the types and deformed so that the ink is transferred.
  • the quality of the imprint regarding blackness, sharpness of contour and width of lines, substantially depends on the deformation of the paper and of the pressure member.
  • Another object of the invention is to reduce the force required for pressing a printing member against sheets located on type faces for obtaining a clear imprint.
  • an embodiment of the invention comprises a type carrier having at least one type, and preferably a line of types having type faces; positioning means for positioning pressure responsive imprint forming sheet means on the type face or faces so that an area of the sheet means covers each type face; printing means including at least one printing element, and preferably a line of resilient printing elements formed by the prongs of a comb-shaped plate; and operating means for sliding the printing elements substantially parallel to the type faces over the areas of the sheet means in frictional contact with the areas, respectively, so that the areas abut the type faces and imprints are made on the respective areas by the respective type faces.
  • the resilient prongs of the printing means have friction faces which, during the printing operation slide under low pressure over the intermediate sheet means and thereby over the type faces of the types of the type carrier which are to be printed.
  • the elastic prongs are moved substantially parallel to the type faces over the respective areas of the sheet means so that very little energy is required for the imprints since the resilient prongs slide on the type face of the types, and are not moved against the type faces in perpendicular direction.
  • the printing plate and the resilient prongs thereof are moved along an elongated endless path so that the prongs pass the sheet means at a distance during movement in one direction, and resiliently slide on the sheet means during movement in opposite direction along the endless elongated path.
  • the prongs move in tangential direction over the respective type faces of the type carrier, and every line is immediately visible after the printing operation since the printing plate and prongs move away from the imprinted types in a direction parallel to the type faces.
  • FIG I is a framentary perspective view illustrating an embodiment of the invention.
  • FIG. 2 is a schematic side view illustrating particularly the operating means for moving the printing plate along an endless path
  • FIG 3 is a side view illustrating a modified apparatus in which instead of pressure sensitive paper, standard paper and an ink ribbon are used.
  • FIG. 4 is a fragmentary perspective view illustrating the mounting of the ink ribbon in the embodiment of FIG. 3.
  • the printing apparatus of the invention can be used for a parallel printer settable over the entire length of a line, as well as for serial printers.
  • a parallel printer which includes a type carrier I composed of a series of type wheels or printing wheels 1c each of which has a predetermined number of types la with type faces lb on which digits and characters are formed.
  • All type wheels 1 are coaxially arranged on a shaft 3, and can be set by apparatus of the type disclosed in the copending U. S. Pat. application Ser. No. 46,198, or in any other conventional way.
  • An imprint forming sheet means 5 which may be a pressure sensitive paper sheet, passes over the type faces 1b, as best seen in FIG. 2.
  • the pressure sensitive sheet means 5 is imprinted, if a comb-shaped printing plate 7, which has resilient prongs 9, is moved along the endless path 13 so that during the return stroke of the printing means 7, 9, the engaging faces 11 of the printing elements or prongs 9 slide over the areas of the pressure sensitive sheet means 5 which respectively cover the type faces lb of the respective operative line of types 1b.
  • the printed line becomes immediately visible since the printing plate 7 with prongs 11 moves away from the type carrier 1.
  • the engaging faces 11 move substantially parallel to the line of type faces 1b formed by the line of types 1a whose characters or digits are to be printed.
  • the engaging faces 11 engage the sheet means 5 at a slight pressure causing a slight resilient deformation of the prongs 9.
  • FIGS. I and 2 Operating means are shown in FIGS. I and 2 for moving the printing means 7, 9, 11 along the endless path 13.
  • the operating means include drive means in the form of a toothed pulley 18a driven by an endless toothed belt 20, and driving a shaft 18 to which a crank arm 19 is secured which has a pivot 1.9a at its outer end connected with one end of a link 15a whose other end is connected by a pivot 33a of a rod 33 to a lever 17 which is turnable about a stationary pivot 17a.
  • Link 15a is part of a rigid linkage 15 which includes bar means 15b which fixedly carry the printing plate 7 with prongs 9.
  • the rigid linkage 15 holds the printing plate 7 with prongs 11 near the reversal point of the endless path 13, and during movement of crank arm 19 to the position shown in chain lines, the linkage assumes the position 15, while lever ll7 moves to position 17, shaft 33 moves to position 33', and the bar means 15b moves to the position 15b.
  • the engaging faces 11 cooperate with the areas of the pressure sensitive sheet means 5 which cover the respective selected line of types la.
  • the resilient prongs 9 move first along the path portion 13a spaced a distance from the sheet means 5, and then move in substantially the opposite direction along the path portion 13b to slidingly and resiliently engage the respective areas of the sheet means 5 which cover the respective type faces lb of the selected line of types la.
  • Any operating means for moving the printing plate 7 with prongs 11 along an endless path may be used instead of the operating means illustrated in FIGS. 1 and 2, and described above.
  • Positioning means including transporting rollers 21 and 23 transport the pressure sensitive sheet means 5 after the imprint of a line has been made so that the next line of free areas is placed on the newly set type faces 1b of a line of newly selected types la.
  • the sheet means 5 producing the imprints may be like the sheets disclosed in the US. Pat. 2,059,537, issued May 16, 1960 to Watkins.
  • holding means including a fixed clamping member 25 and a movable clamping member 35 forming a gap through which the sheet means 5 is transported by the transporting rollers 21, 23.
  • the movable clamping member 35 has an arm 35a mounted on shaft 3 for angular movement between the illustrated position in which clamping members 25, 35 are spaced, and a clamping position pressing sheet means 5 against the clamping bar 25.
  • An arm 31 is connected with clamping bar 35, and cooperates with the shaft 33 which is part of the operating means which move the printing plate 7 with prongs 9 along the endless path 13.
  • a spring 37 connects a fixed frame point with arm 31 to press the same against shaft 33, as also shown in FIG. ll.
  • shaft 33 is in such a position that it permits spring 37 to move the clamping bar 35 to a position clamping and holding the sheet means 5 to prevent a slipping of the same on the type faces due to the movement of the engaging faces lll over the respective areas.
  • shaft 33 assumes a position for displacing arm 31 and for moving clamping bar 35 to the position shown in FIG. 2 in which sheet means 5 can be transported through the gap between clamping bars 25 and 35 by the transporting rollers 21, 23 which properly position the next free line of areas of sheet means 5 over the respective line of type faces 1b.
  • FIGS. 1, 2 and 3 operates as follows:
  • the comb-shaped printing plate 7 with elastic prongs 9 is in the position illustrated in solid lines in FIG. 2, and spaced from the type carrier 1 in tangential direction so that the previously printed line on sheet means 5 is freely visible.
  • a clutch, not shown, or a motor, not shown, is operated to start the belt to rotate pulley 18a and to drive crank arm 19 in a rotary motion so that the operating means including the rigid linkage l5 and lever 117 are driven to move printing plate '7 with prongs ll along the endless flat path 13 first along the path portion 13a spaced from the selected type faces and the sheet means 5, and then back in a return stroke along the path portion 13b, which is so disposed that the engaging faces 11 of the prongs 9 slide over the areas of the sheet means 5 covering the type faces lb of the line of selected types Ila.
  • Prongs 9 are slightly deformed and resiliently yield to the small pressure between the engagement faces Ill and types lla. Since the printing plate 7 and prongs 9 immediately move away from the imprinted areas of sheet means 5, the new line imprint is immediately visible, in contrast to a prior art arrangement in which printing means are moved in a radial direction into engagement and out of engagement with areas of a sheet covering the type faces of the selected types.
  • shaft 33 is operative to displace arm 31 to move clamping bar to a position increasing the width of the gap between clamping bars 35 and 25 so that sheet means 5 can be properly positioned.
  • a pressure responsive sheet means 5 is used which produces a legible imprint when engaging faces 1111 slide with friction over the respective areas of the sheet means 5 which are supported by the characters of the type faces llb.
  • the sheet means include a paper sheet 41, and an ink ribbon 43. Since it would not be suitable to slide the engaging faces 11 of the prongs 9 over the ink ribbon 43, the ink ribbon is covered by a stationary foil on which the engaging faces llll slide while being resiliently deformed to exert pressure on ink ribbon 43, sheet 41, and the type faces lb of the types of the respective line of types.
  • the stationarily held foil 45 does not transmit the sliding motion of the engaging faces ll 1 to the ink ribbon 43 and to the paper sheet 41, so that a clear imprint is made.
  • the ink ribbon 43 is raised by conventional mechanism to a position located at the height of the respective line of types la to be printed. in order to review the printed line, foil 45 must also be retracted when the ink ribbon 43 is lowered. An apparatus serving this purpose is shown in FIG. 4.
  • the ink ribbon 45 passes through, and is guided by, arms 46 and 43 which are mounted on a frame 42 supported for angular movement about a shaft 40.
  • frame 42 with arms 46, 48 is turned by a rotary cam 44 to a position in which the printed line is visible.
  • Spring 38 holds frame 42 in engagement with cam 44.
  • the foil 45 which may consist of a synthetic material, a thin metal sheet, or the like, is secured to a frame 50 which is mounted on the arms 46 and 48 of the mov able ink ribbon frame 42 so that the foil moves with the ink ribbon 43 to a position spaced from the line imprinted on the sheet 41, not shown in H6. 4, so that the line is visible for inspection.
  • a modification is possible, in which the engaging face ll of a prong 9 is adjusted only in a direction perpendicular to the type face, while the sheet means 5 and the type carrier l move at the same speed during the printing operation.
  • the engaging face 11 of the prong 9 slides over the sheet means 5 and the type faces of the selected types so that a relative motion in tangential direction is maintained.
  • the printing on the sheet means should take place during the line shifting of the sheet means.
  • Printing apparatus for business machines, comprising support means; a type carrier mounted on said support means and including a line of types having type faces; positioning means movably mounted on said support means for positioning pressure-sensitive imprintforming sheet means on said type faces, said sheet means having a row of areas covering said type faces, respectively, of said line of types; printing means including a comb-shaped means having a row of resilient prongs forming a line of printing elements; and driven operating means movably mounted on said support means and connected with said printing means for slidingly moving said printing elements over said areas, respectively, and over the covered type faces substantially parallel to said type faces so that said prongs are resiliently deformed while in sliding contact with said areas, respectively, whereby imprints are made by said type faces on said areas.
  • said operating means includes a crank arm rotatable about a first axis, a rigid linkage including a link having one end pivotally connected with the outer end of said crank arm and bar means rigidly connected with said link and said comb-shaped plate, a lever supported for angular movement about a second axis and having a free end pivotally connected with the other end of said link, and drive means for rotating said crank arm whereby said comb-shaped plate moves about an elongated endless path during rotation of said crank arm.
  • Printing apparatus for business machines, comprising support means; a type carrier mounted on said support means and including a line of type faces; positioning means movably mounted on said support means for positioning pressure-sensitive imprint-forming sheet means on said type faces, said sheet means having rows of areas for covering said type faces, respectively, of said line of types, said positioning means including driven transporting means movably mounted on said support means in driving connection with said sheet means for moving successive rows of areas of said sheet means into printing positions covering said line of type faces, respectively; printing means including a line of resilient printing elements movable along paths, respectively, passing over said areas, respectively; driven operating means movably mounted on said support means and connected with said printing means for slidingly moving said printing elements along said paths over said areas, respectively, and over the covered type faces substantially parallel to said type faces so that said printing elements are resiliently deformed while in sliding contact with said areas, respectively, whereby imprints are made by said type faces on said areas, respectively; and movable holding means connected with to O) and operated by said operating means for holding said sheet means immovably
  • said holding means include a stationary clamping means and a movable clamping means forming a gap through which said sheet means is moved by said transporting means; and wherein said movable clamping means is connected to, and operated by said operating means to press said sheet means against said first clamping means so as to clamp and immovably hold said sheet means during the sliding movement of said printing elements over said areas.
  • Printing apparatus as claimed in claim 6 wherein said movable clamping means is mounted for angular movement and has an arm and wherein said operating means includes a spring connected with said arm, a rotary crank, and means driven by said rotary crank during movement of said sheet means by said transporting means to engage said arm for moving said movable clamping means against the action of said spring away from said sheet means and said fixed clamping means.
  • said movable clamping means includes a clamping bar, and a resilient cover for said clamping bar engaging said sheet means when said movable clamping means is moved toward said fixed clamping means,
  • Printing apparatus for business machines comprising support means; a type carrier mounted on said support means and including a line of type faces; positioning means mounted on said support means for positioning a sheet means including a paper sheet having one side confronting said type faces, and an ink ribbon on the other side of said paper sheet, said sheet means having rows of areas for covering said type faces, respectively, of said line of type faces; printing means including a line of resilient printing elements movable along paths passing over said areas, respectively; a frame located in the proximity of said line of types of said type carrier; a foil supported on said frame between said ink ribbon and said printing elements; and driven operating means movably mounted on said support means and connected with said printing means for slidingly moving said printing elements along said paths on said foil so that said printing elements slide over said foil and are resiliently deformed while holding said foil on said ink ribbon, and said ink ribbon on said paper sheet whereby imprints are made by said type faces on said areas.

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US00252015A 1971-05-19 1972-05-10 Printing apparatus for business machines Expired - Lifetime US3788214A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712124889 DE2124889B2 (de) 1971-05-19 1971-05-19 Druckwerk fuer schreib-, rechen- oder aehnliche bueromaschinen

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DE (1) DE2124889B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3954054A (en) * 1974-07-25 1976-05-04 Addmaster Corporation Squeeze printer for papers or stacks of papers of varying thicknesses
US4196666A (en) * 1976-03-04 1980-04-08 Hitachi Koki Company, Limited Printing apparatus having print line visibility control

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1993848A (en) * 1931-05-29 1935-03-12 Krell Joseph Printing machine
US2632384A (en) * 1948-04-13 1953-03-24 Adrema Ltd Addressing machine
US2935934A (en) * 1958-06-23 1960-05-10 Ncr Co Printing mechanisms
US3128694A (en) * 1961-10-16 1964-04-14 Holley Carburetor Co Print hammer mechanism
US3143063A (en) * 1962-09-27 1964-08-04 Ncr Co Double print preventing shield in web printing machines
US3309989A (en) * 1965-09-16 1967-03-21 Gen Electric Print hammer
US3351007A (en) * 1965-10-18 1967-11-07 Control Data Corp Print hammer rapid reset means in high speed printers
US3373682A (en) * 1966-01-17 1968-03-19 Arthur M. Angel Transaction recorder for printing on pressure-sensitive journal tape
US3538848A (en) * 1969-04-22 1970-11-10 Control Data Corp Latch means for a traveling roller platen on a swingable carriage
US3547028A (en) * 1968-02-02 1970-12-15 Sherwood Medical Ind Inc Vibratable platen means in selective printing machines
US3702585A (en) * 1970-06-05 1972-11-14 Ncr Co Printing mechanism producing a rubbing action

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1993848A (en) * 1931-05-29 1935-03-12 Krell Joseph Printing machine
US2632384A (en) * 1948-04-13 1953-03-24 Adrema Ltd Addressing machine
US2935934A (en) * 1958-06-23 1960-05-10 Ncr Co Printing mechanisms
US3128694A (en) * 1961-10-16 1964-04-14 Holley Carburetor Co Print hammer mechanism
US3143063A (en) * 1962-09-27 1964-08-04 Ncr Co Double print preventing shield in web printing machines
US3309989A (en) * 1965-09-16 1967-03-21 Gen Electric Print hammer
US3351007A (en) * 1965-10-18 1967-11-07 Control Data Corp Print hammer rapid reset means in high speed printers
US3373682A (en) * 1966-01-17 1968-03-19 Arthur M. Angel Transaction recorder for printing on pressure-sensitive journal tape
US3547028A (en) * 1968-02-02 1970-12-15 Sherwood Medical Ind Inc Vibratable platen means in selective printing machines
US3538848A (en) * 1969-04-22 1970-11-10 Control Data Corp Latch means for a traveling roller platen on a swingable carriage
US3702585A (en) * 1970-06-05 1972-11-14 Ncr Co Printing mechanism producing a rubbing action

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3954054A (en) * 1974-07-25 1976-05-04 Addmaster Corporation Squeeze printer for papers or stacks of papers of varying thicknesses
US4196666A (en) * 1976-03-04 1980-04-08 Hitachi Koki Company, Limited Printing apparatus having print line visibility control

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DE2124889A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-06-08
DE2124889B2 (de) 1972-06-08

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