US3927751A - Pin guide for printing head - Google Patents

Pin guide for printing head Download PDF

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Publication number
US3927751A
US3927751A US486199A US48619974A US3927751A US 3927751 A US3927751 A US 3927751A US 486199 A US486199 A US 486199A US 48619974 A US48619974 A US 48619974A US 3927751 A US3927751 A US 3927751A
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US
United States
Prior art keywords
support
head
plates
printing head
recess
Prior art date
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
Application number
US486199A
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English (en)
Inventor
Claude-Michel Juvet
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.)
Seitz AG
Original Assignee
Seitz AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Seitz AG filed Critical Seitz AG
Application granted granted Critical
Publication of US3927751A publication Critical patent/US3927751A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B41J2/235—Print head assemblies
    • B41J2/25—Print wires
    • B41J2/255—Arrangement of the print ends of the wires

Definitions

  • the present invention relates to a pin guide for print ing head, more particularly of the type in which a plurality of pins are slidably disposed in a guide way for selective advancement so as to permit mosaic-type printing with a striking printing head.
  • the pins slide in a very hard and wear-resistant substance such as corundum, which may be natural but is preferably synthetic, of the type of ruby or sapphire. It is known to provide such guides, which are cemented in a recess in a forward surface of the printing head. However, it is difficult to align the guide according to this method, and there is a further risk of misalignment during setting of the cement.
  • corundum which may be natural but is preferably synthetic, of the type of ruby or sapphire.
  • the object of the invention is achieved by providingfor the guide members of corundum or the like, a support to which they are fixed, the support having at least one reference surface that coacts with a reference surface on the printing head to which the support is detachably secured, and at least one reference surface that coacts with a reference surface on the guides, so as to ensure that the support and hence the guides, are precisely positioned relative to the printing head.
  • FIG. 1 is an exploded perspective view of a support and pin guides according to the present invention
  • FIG. 1A is a fragmentary perspective view of one embodiment of printing head according to the present invention.
  • FIG. 1B is a view similar to FIG. 1A but showing a second embodiment of printing head
  • FIG. 2 is an enlarged fragmentary front view of a printing head as in FIG. 1A, showing a modified form of support and showing the pin guides in place on the support;
  • FIG. 3 is a cross-sectional view on the line B-B of FIG. 2;
  • FIG. 4 is a view similar to FIG. 3 but showing the printing head of FIG. 1B.
  • a device comprising a pair of guides in the form of small'thin plates 1 of corundum, which may be natural or synthetic, preferably synthetic, known as ruby or sapphire.
  • the plates 1 define between them a plurality of holes 2 by virtue of the fact that the edges of the plates have grooves therein that register with the grooves of the other plate. It is of course to be understood that selectively reciprocable pins (not shown) of the type used for mosaic printing will slide in the holes 2 in the usual manner.
  • the plates 1 are of course of corundum so as to be wear resistant.
  • a support 3 which can be metal or plastic, is provided for plates 1 and has a forward prismatic portion 4 and a rear cylindrical portion 5.
  • a hole 6 extends lengthwise through support 3 and has a height H which is somewhat greater than the height h of the series of holes 2.
  • Prismatic portion 4 of support 3 has a polygonal recess 7 in which the plates 1 ,arecemented.
  • the bottom ofrecess 7 is perpendicular to the axis of cylindrical portion 5 and the sidewalls of recess 7 are parallel to. that faxis. l
  • the striking printing head 8 whose first embodiment is shown in FIG. 1A, has a cylindrical hole 9 therethrough for the reception of cylindrical portion 5 of support 3, and a rectangular groove 10 for the reception of prismatic portion 4 of guide 3.
  • the bottom of groove 10 is perpendicular to the axis of hole 9 and the side walls of groove 10 are parallel to that axis. If the cylinder 5 and hole 9 have a diameter of, say, about 5 mm. then the groove 10 and prismatic portion 4 might have a width of about 6 mm.
  • a set screw 11 secures support 3 in head 8; although alternatively, support 3 can be cemented in head 8.
  • the printing head 12 is similar to that of FIG. LA but provides only a single lateral reference guide surface 13 for the support 3, which as before is held in the printing head by a set screw 14. b
  • FIGS. 2-4 a modified form of support 3 is shown, in which the margins bordering the recess 7 are replaced by projections 15 and 16.
  • the margins bordering the recess 7 or the projections 15 and 16 provide locator guide surfaces for the plates 1, which may be cemented to the corresponding base of the support 3 and laterally to the side edges of the recess, so that the plates 1 are precisely oriented relative to the support 3.
  • the holes 2 are precisely oriented relative to the printing head.
  • a support for a pin guide, and a head to which said support is secured said support having a recess therein, a pair of plates cemented in said recess, said plates having opposed edges that define openings between said opposed edges, said support having a cylindrical rear projection that engages in a cylindrical opening in said head, said recess and said plates having a plurality of flat surfaces that are in area contact with each other and that are perpendicular to the axis of said cylindrical rear projection, said recess and said plates having further flat surfaces that are in area contact with each other and that are parallel to said axis, said recess being defined by said flat surfaces thereof, said support and 4 support and said head including at least one flat surface on at leastone projection that extends forwardly from said head, and a setscrew releasably securing said support in said head.

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US486199A 1973-07-06 1974-07-05 Pin guide for printing head Expired - Lifetime US3927751A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH986373A CH569591A5 (US06826419-20041130-M00005.png) 1973-07-06 1973-07-06

Publications (1)

Publication Number Publication Date
US3927751A true US3927751A (en) 1975-12-23

Family

ID=4356500

Family Applications (1)

Application Number Title Priority Date Filing Date
US486199A Expired - Lifetime US3927751A (en) 1973-07-06 1974-07-05 Pin guide for printing head

Country Status (4)

Country Link
US (1) US3927751A (US06826419-20041130-M00005.png)
CH (1) CH569591A5 (US06826419-20041130-M00005.png)
DE (1) DE2431972A1 (US06826419-20041130-M00005.png)
FR (1) FR2235803B3 (US06826419-20041130-M00005.png)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4046303A (en) * 1974-07-31 1977-09-06 Siemens Aktiengesellschaft Method of making needle guide devices for mosaic printers
US4084678A (en) * 1974-07-31 1978-04-18 Siemens Aktiengesellschaft Printer needle guide means for mosaic printers
FR2383787A1 (fr) * 1977-03-15 1978-10-13 Philips Nv Palier de tete d'impression d'une imprimante matricielle et tete d'impression munie d'un tel palier
US4662764A (en) * 1984-10-05 1987-05-05 Honeywell Information Systems Italia Ruby and needle guiding group for needle printing head
US5127749A (en) * 1991-06-21 1992-07-07 Depot America, Inc. Method of repairing printheads and product thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3991870A (en) * 1975-06-06 1976-11-16 Centronics Data Computer Corporation Replaceable composite wire guide assembly
CH609916A5 (en) * 1977-04-20 1979-03-30 Seitz Sa Needle guide

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3802543A (en) * 1971-09-13 1974-04-09 Centronics Data Computer Jewel bearings for printer heads and the like
US3820643A (en) * 1971-09-09 1974-06-28 Anker Werke Ag Recorder head for compound alphanumeric characters and code characters

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3820643A (en) * 1971-09-09 1974-06-28 Anker Werke Ag Recorder head for compound alphanumeric characters and code characters
US3802543A (en) * 1971-09-13 1974-04-09 Centronics Data Computer Jewel bearings for printer heads and the like

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4046303A (en) * 1974-07-31 1977-09-06 Siemens Aktiengesellschaft Method of making needle guide devices for mosaic printers
US4084678A (en) * 1974-07-31 1978-04-18 Siemens Aktiengesellschaft Printer needle guide means for mosaic printers
FR2383787A1 (fr) * 1977-03-15 1978-10-13 Philips Nv Palier de tete d'impression d'une imprimante matricielle et tete d'impression munie d'un tel palier
US4662764A (en) * 1984-10-05 1987-05-05 Honeywell Information Systems Italia Ruby and needle guiding group for needle printing head
US5127749A (en) * 1991-06-21 1992-07-07 Depot America, Inc. Method of repairing printheads and product thereof

Also Published As

Publication number Publication date
DE2431972A1 (de) 1975-01-23
CH569591A5 (US06826419-20041130-M00005.png) 1975-11-28
FR2235803B3 (US06826419-20041130-M00005.png) 1977-05-06
FR2235803A1 (US06826419-20041130-M00005.png) 1975-01-31

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