US3480127A - Printing platen for calculating and bookkeeping machines - Google Patents

Printing platen for calculating and bookkeeping machines Download PDF

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Publication number
US3480127A
US3480127A US639359A US3480127DA US3480127A US 3480127 A US3480127 A US 3480127A US 639359 A US639359 A US 639359A US 3480127D A US3480127D A US 3480127DA US 3480127 A US3480127 A US 3480127A
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United States
Prior art keywords
platen
rings
type
printing
grooves
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Expired - Lifetime
Application number
US639359A
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English (en)
Inventor
Alfred Hesse
Wolfgang Bindel
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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Filing date
Publication date
Application filed by Olympia Werke AG filed Critical Olympia Werke AG
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Publication of US3480127A publication Critical patent/US3480127A/en
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    • 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/02—Platens
    • B41J11/04—Roller platens
    • B41J11/053—Roller platens with sound-deadening devices

Definitions

  • a printing platen for calculating and bookkeeping machines is provided with an outer resilient surface consisting of spaced rings, the spacing being in correspondence to the spacing of the type carriers of the machine.
  • the conventional printing platens normally have an outside surface coating of elastic material and a smooth cylindrical periphery.
  • This type of conventional platen has a number of shortcomings. In order to avoid blurred imprints or so-called ghost prints due to deformation of the platen coat it is necessary to form the coat of a comparatively hard though resilient material. This in turn causes a comparatively high noise level particularly since the conventional printing platen requires a rather high speed of the type bars bearing on the platen.
  • a platen which comprises an axle, a platen body and a surface on said body which surface consists of resilient mate rial and is in the form of a plurality of juxtaposed rings spaced against each other in correspondence to the spacing of the type bars of the machine.
  • the platen is provided with a cylindrical outer jacket which is slotted in a direction transversal to the axis of the platen.
  • the grooves thus formed are spaced against each other so as to form intermediate rings of the type just defined.
  • the spacing between the rings must have a cross section of a width and shape sufficient to permit the lateral expansion due to the springy action of the material of the individual rings during the impact with the type bars.
  • FIG. 1 shows in diagrammatic form a plan view of the platen and of the type carriers which face the platen;
  • FIG. 2 is a perspective view of a printing platen and shows a type carrier in position for printing.
  • FIG. 3 is an enlarged cross section on lines 3-3 of FIG. 2;
  • FIG. 4 is a schematic representation of different cross sections of grooves as used in the invention.
  • the platen of the invention is suited in particular for printing machines with so-called printing platens, that is, machines where the platen moves with comparatively low speed relative to type bars set in position and irrespective of whether one or several numerical values are simultaneously printed.
  • the device of the invention permits the use of soft rubber in the platen and therefore makes it possible to use type made of synthetic material.
  • the type used in conjunction with the device according to the invention does not have to be actuated with a heavy touch. Rather it is possible to form clear imprints by merely printing or pressing which will reduce the noise level and also simplifies the drive mechanism of the platen.
  • a preferred embodiment of the invention consists in providing the platen with a separate cylindrical jacket that forms the outer periphery of the platen body. The jacket is subdivided by transversal grooves into parallel rings corresponding in their spacing to the spacing of the type bars.
  • This embodiment has the advantage that the platen coat can be applied to the platen body as one single part.
  • the spaces between the rings or between the transversal slots should have a cross section of a shape and size to form individual springy deflection areas for the rings which are not subject to interference by the deflection of the adjoining ring.
  • 1 is the platen from which the axle 2 extends at both ends.
  • a surface coat 4 of an elastic material such as rather soft rubber.
  • This surface coat 4 in the embodiment of FIG. 1 consists of individual rings 5 which are each disposed opposite one of the types 7 and are spaced from one another by a distance corresponding with the spacing of the types 7 as indicated at 8.
  • FIG. 1 also shows at the right end a ring 5a which is opposite the type 7a and is intended for the functional symbols. It is spaced from the inwardly adjacent ring 5 by a distance greater than the distance 8.
  • Platen 1 shown in FIG. 1 is intended for a ten place printing machine. At the right and left end there are reinforced border rings 6 which constitute the two ends of the platen coat 4.
  • FIG. 2 shows another embodiment of the platen 1a in a perspective view.
  • the axle 2 which preferably consists of metal there is provided in addition to the platen body 3 a line indexing gear 9 and a knob 10 for rotating the platen 1a.
  • the platen body 3, the indexing gear 9 and the actuating knob 10 may be made of a suitable plastic.
  • a surface jacket or coat 40 is provided on platen body 3.
  • the coat 40 is formed as a cylindrical jacket of elastic material such as fairly soft rubber.
  • the jacket surface is subdivided by incision or notching into transversal grooves 13 corresponding to the spacing 8 of the type 7.
  • a ring 50a serves for the imprinting of the functional symbols and is spaced from the inwardly adjacent ring 50 by a groove 13' which is wider than the grooves 13, while the lateral border rings 60 are again formed as rather wide rings.
  • a type bar which is represented as a type rod 12 in position for printing.
  • a paper strip or sheet 11 is disposed between rod 12 and the opposite ring 50.
  • the imprint of a figure, for instance, the numeral 3 causes the expansion of ring 50 to both sides of the imprint place. As is apparent in FIGURE 2, the expansion of the ring 50 does not interfere with the neighboring rings 50.
  • FIG. 3 shows the imprint position of the platen 1a illustrated in FIG. 2 in a longitudinal section and on an enlarged scale.
  • Type 7 is here in place on the paper 11 and causes a deformation of the printing space 50b of ring 50 which is disposed beneath the type 7 and paper 11.
  • the transversal grooves 13 offer sufficient space for the laterally extending ring 50. As FIG. 3 clearly shows, the transversal grooves 13 are wide enough to receive even a strong lateral enlargement of the printing spot 50b of the adjoining rings 50.
  • FIG. 4 illustrates different cross sections of the grooves. Whereas FIG. 1 shows that the cross sections can be square, FIG. 4 indicates that they can also be inwardly convergent in the manner designated by reference numeral 13a, or substantially U-shaped, as shown at 13b, or V- shaped, as shown at 13c.
  • a platen elongated in said given direction and arranged oppositely but spaced from said type bars for impacting by the same, said platen comprising an axle, a platen body on said axle, and an outer covering of resiliently deformable material provided on said platen body and comprising a plurality of raised annular portions surrounding said platen body and a plurality of annular grooves extending parallel to said annular portions and alternating therewith, consecutive ones of said annular portions being spaced from one another by said predetermined distance and each being located oppositely one of said type bars, said annular grooves each having a cross-section so dimensioned and configurated as to provide a lateral expansion area for the respectively adjoining annular portions, whereby each of said annular portions may undergo resilient lateral expansion on receiving impacts from its associated type bar without such expansion interfering with the adjacent annular portions.

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US639359A 1966-06-16 1967-05-18 Printing platen for calculating and bookkeeping machines Expired - Lifetime US3480127A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEO0011734 1966-06-16

Publications (1)

Publication Number Publication Date
US3480127A true US3480127A (en) 1969-11-25

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ID=7352438

Family Applications (1)

Application Number Title Priority Date Filing Date
US639359A Expired - Lifetime US3480127A (en) 1966-06-16 1967-05-18 Printing platen for calculating and bookkeeping machines

Country Status (6)

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US (1) US3480127A (de)
CH (1) CH454499A (de)
DE (1) DE1524058B1 (de)
GB (1) GB1180786A (de)
NL (1) NL6708353A (de)
SE (1) SE310565B (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3868008A (en) * 1973-06-13 1975-02-25 Ibm Printing station apparatus for a bank passbook type document
US3920113A (en) * 1972-10-26 1975-11-18 Suwa Seikosha Kk Platen roll arrangement for typewheel printer
US3952652A (en) * 1972-12-06 1976-04-27 Monarch Marking Systems, Inc. Label printing and applying apparatus
US4285275A (en) * 1978-06-26 1981-08-25 Kabushiki Kaisha Sato Kenkyusho Printing platen for hand labeler, or the like
US4411197A (en) * 1979-08-14 1983-10-25 Kabushiki Kaisha Sato Kenkyusho Printing device for hand labeler
US4540296A (en) * 1981-12-21 1985-09-10 International Business Machines Corporation Bar band intersectional matrix printer
US4929106A (en) * 1988-10-12 1990-05-29 Pitney Bowes Inc. Platen module
US5013170A (en) * 1988-02-19 1991-05-07 Ta Triumph Adler Aktiengesellschaft Plastic platen for typewriters or similar office equipment
US6036380A (en) * 1997-02-20 2000-03-14 Encad, Inc. Printer having a plastic platen

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US635609A (en) * 1896-09-22 1899-10-24 Jacob Felbel Type-writing machine.
US666663A (en) * 1900-03-15 1901-01-29 Andrew Graff Platen for type-writing or other machines.
US914612A (en) * 1897-03-27 1909-03-09 Union Typewriter Co Type-writing machine.
US998510A (en) * 1909-10-02 1911-07-18 Robert P Heron Type-writer platen and other roller.
US999942A (en) * 1909-04-22 1911-08-08 Remington Typewriter Co Type-writing machine.
US1116395A (en) * 1913-08-08 1914-11-10 Frank Dowd Roller-platen for type-writing machines.
US1200779A (en) * 1916-04-21 1916-10-10 William A Thompson Type-writing machine.
US1288896A (en) * 1918-02-08 1918-12-24 Charles Houseman Printing-machine.
US1386379A (en) * 1917-11-13 1921-08-02 Underwood Typewriter Co Typewriting-machine
GB234034A (en) * 1924-05-20 1925-05-21 Oskar Fischer Improvements in type-cylinders for typewriting machines
US1804160A (en) * 1928-07-12 1931-05-05 Arthur B Froehlich Printing mechanism
US2418698A (en) * 1944-05-22 1947-04-08 Underwood Corp Noiseless platen for typewriting machines
US3057450A (en) * 1961-03-07 1962-10-09 Jr Edward J Gallagher Noiseless typewriter or the like
US3381790A (en) * 1966-05-13 1968-05-07 Sarl Soc Lamy D Etudes Et De R Rolling contact typewheel printer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE612337C (de) * 1935-04-18 Triumph Werke Nuernberg Akt Ge Verfahren zum Herstellen einer Schreibwalze fuer Schreibmaschinen

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US635609A (en) * 1896-09-22 1899-10-24 Jacob Felbel Type-writing machine.
US914612A (en) * 1897-03-27 1909-03-09 Union Typewriter Co Type-writing machine.
US666663A (en) * 1900-03-15 1901-01-29 Andrew Graff Platen for type-writing or other machines.
US999942A (en) * 1909-04-22 1911-08-08 Remington Typewriter Co Type-writing machine.
US998510A (en) * 1909-10-02 1911-07-18 Robert P Heron Type-writer platen and other roller.
US1116395A (en) * 1913-08-08 1914-11-10 Frank Dowd Roller-platen for type-writing machines.
US1200779A (en) * 1916-04-21 1916-10-10 William A Thompson Type-writing machine.
US1386379A (en) * 1917-11-13 1921-08-02 Underwood Typewriter Co Typewriting-machine
US1288896A (en) * 1918-02-08 1918-12-24 Charles Houseman Printing-machine.
GB234034A (en) * 1924-05-20 1925-05-21 Oskar Fischer Improvements in type-cylinders for typewriting machines
US1804160A (en) * 1928-07-12 1931-05-05 Arthur B Froehlich Printing mechanism
US2418698A (en) * 1944-05-22 1947-04-08 Underwood Corp Noiseless platen for typewriting machines
US3057450A (en) * 1961-03-07 1962-10-09 Jr Edward J Gallagher Noiseless typewriter or the like
US3381790A (en) * 1966-05-13 1968-05-07 Sarl Soc Lamy D Etudes Et De R Rolling contact typewheel printer

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3920113A (en) * 1972-10-26 1975-11-18 Suwa Seikosha Kk Platen roll arrangement for typewheel printer
US3952652A (en) * 1972-12-06 1976-04-27 Monarch Marking Systems, Inc. Label printing and applying apparatus
US3868008A (en) * 1973-06-13 1975-02-25 Ibm Printing station apparatus for a bank passbook type document
US4285275A (en) * 1978-06-26 1981-08-25 Kabushiki Kaisha Sato Kenkyusho Printing platen for hand labeler, or the like
US4411197A (en) * 1979-08-14 1983-10-25 Kabushiki Kaisha Sato Kenkyusho Printing device for hand labeler
US4540296A (en) * 1981-12-21 1985-09-10 International Business Machines Corporation Bar band intersectional matrix printer
US5013170A (en) * 1988-02-19 1991-05-07 Ta Triumph Adler Aktiengesellschaft Plastic platen for typewriters or similar office equipment
US4929106A (en) * 1988-10-12 1990-05-29 Pitney Bowes Inc. Platen module
US6036380A (en) * 1997-02-20 2000-03-14 Encad, Inc. Printer having a plastic platen

Also Published As

Publication number Publication date
GB1180786A (en) 1970-02-11
CH454499A (de) 1968-04-15
DE1524058B1 (de) 1970-04-23
SE310565B (de) 1969-05-05
NL6708353A (de) 1967-12-18

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