US3110250A - Printer hammer assembly - Google Patents

Printer hammer assembly Download PDF

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Publication number
US3110250A
US3110250A US146560A US14656061A US3110250A US 3110250 A US3110250 A US 3110250A US 146560 A US146560 A US 146560A US 14656061 A US14656061 A US 14656061A US 3110250 A US3110250 A US 3110250A
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US
United States
Prior art keywords
hammer
printing
printer
bearing
type
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
US146560A
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English (en)
Inventor
Fradkin Joseph
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.)
Potter Instrument Co Inc
Original Assignee
Potter Instrument Co Inc
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
Priority to FR1317862D priority Critical patent/FR1317862A/fr
Application filed by Potter Instrument Co Inc filed Critical Potter Instrument Co Inc
Priority to US146560A priority patent/US3110250A/en
Priority to GB963/62A priority patent/GB976586A/en
Application granted granted Critical
Publication of US3110250A publication Critical patent/US3110250A/en
Anticipated expiration legal-status Critical
Assigned to SPERRY CORPORATION reassignment SPERRY CORPORATION LICENSE (SEE DOCUMENT FOR DETAILS). EFFECTIVE OCT. 15,1982 Assignors: POTTER INSTRUMENT COMPANY, INC.
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
    • B41J9/00—Hammer-impression mechanisms
    • B41J9/02—Hammers; Arrangements thereof
    • B41J9/133—Construction of hammer body or tip

Definitions

  • This invention generally, relates to printer hammers and, more particularly, to a printer hammer assembly including a frictionless support for a relatively small displacement.
  • printer hammers which strike paper and/ or ribbon usually move through small angles at extremely high speeds. These hammers must be pivoted and controlled accurately since the hammer head must strike the same spot repeatedly upon command.
  • journal, ball or roller type bearings have been used to support printer hammers.
  • all of these hearings have parts which move relative to one another, and in time, this relative motion of the bearing parts produces wear resulting in dimension changes in the bearing and loss of accurate position control of the pivoting hammer.
  • a further object of the invention is to provide a frictionless printer hammer-bearing assembly for movement through a relatively small angle.
  • a still further object of the invention is to provide a printer hammer-support bearing assembly to permit movement through relatively small angles repeatedly with substantially no Wear.
  • Another object of the invention is to provide a printer hammer-bearing assembly for permitting relatively small displacement and exhibiting low cost in manufacture.
  • Still another object of the invention is to provide a printer hammer-bearing assembly permitting small displacement and permitting insulation between the supported members.
  • Yet another object is to provide a printer hammersupport bearing assembly which permits movement between supported elements and provides also a bias force tending to return the printer hammer to an initial, predetermined relative position.
  • the invention includes a printing hammer with elastomeric means to support the hammer for movement through a small displacement, such assembly being uniquely adapted for use in a high speed printer, for example.
  • An axis defines a relative fixed reference, and a printing hammer is supported on the axis for movement through a small displacement relative to the axis.
  • An elastomeric means is disposed between the axis and the printing hammer to support the hammer for movement pivotally on the axis.
  • the resilient or elastic characteristics of the elastomeric means provides a bias force which urges the hammer to return to its initial, retracted position relative to the fixed axis.
  • this characteristic is not particularly advantageous for printer hammer bearings since it is not sufiiciently quick-acting, and therefore, in accordance with the invention, it is necessary to provide a separate hammer-return device, such as a spring for example.
  • FIG. 1 is a high speed printing drum which is typical of the type-supporting element used with an assembly in accordance with the principles of the invention
  • FIG. 2 is a partial side view of a printing hammer and bearing assembly in accordance with the invention.
  • FIG. 3 is an enlarged view of the hammer support in accordance with the principles of the invention.
  • FIG. 4- is an exploded view of component parts of one hammer bearing
  • FIG. 5 is a detailed view of one mount for the printer hammer-hearing assembly of the invention.
  • FIG. 6 is a set of curves illustrating the Time of Flight characteristics of the invention as compared with prior devices.
  • Printing hammer assemblies of the kind to which the present invention relates operate customarily at extremely high speeds, and it is essential too that such operation be in a consistent manner.
  • each hammer in a high speed printer apparatus should strike a type with substantially the same force and substantially the same way each time during operations that total in the millions.
  • a high speed printer drum 1 is carried by a shaft 2 for rotation by conventional means, not shown.
  • the surface of the drum it carries rows of type faces 3--4-5 which are provided as raised letters and/ or figures. While this drum 1 is typical of those to be used with the hammers of the present invention, it is not intended to limit the invention to a particular type-supporting member.
  • a hammer 7, in a typical assembly in accordance with the present invention, is positioned contiguously with the drum 1 for printing on a paper sheet t; in response to an impact of a hammer head 3.
  • the hammer '7 carries an impact head 8 at one end and the opposite end 9 is located appropriately to be pulled by a magnet core i in response to printing current applied to ends 32 and 13 of a coil 11 from a suitable external source, not shown.
  • the hammer 7 carries an annular bearing 14 which contains an annulus of elastomeric material is acting as an elastic support bearing between the hammer 7 and a sleeve 16 tted on a center axis pin 17.
  • These parts that is the bearing parts 14, 15, i6 and 17 are tightly fitted together and, if necessary, are cemented at one or more of the interfaces so that when the hammer is rocked in operation, all of the motion at the bearing consists in deformation of the elastomeric material 15. There is no sliding between parts at the interfaces.
  • the hammer construction herein above described in accordance with the present invention is capable of extremely high speed op eration when a biasing spring S is positioned to urge the hammer '7 in its retracted position.
  • PEG. 3 shows an enlarged view of the hammer bearing assembled in accordance with the present invention. This figure shows the hammer body '7 broken away, the annular bearing 14, the elastomeric material 15, the sleeve 16 and the center pin 17. These parts are all assembled in such a manner that when the pin 17 is firmly held and the hammer body 7 is pivoted with the pin 17 as a center axis, the motion is entirely taken up by deformation of the elastomeric material 15 with no relative movement between the various parts at their boundaries.
  • FIG. 4 the essential parts of the hammer bearing are exploded to re'eal their interconnection in accordance with the present invention.
  • This view shows the hammer body 7 (broken away on both sides) with the annular bearing 14 secured to it as by welding, after which the inner bore 18 is machined to precise size and perpendicularity to the body 7.
  • the elastomeric material 15 is bonded to the sleeve 16 which in turn has an accurately determined center hole 19.
  • the elastomeric material 2.5 may be formed oversized by a predetermined amount so that when it is pushed into the hole 18 in the annular bearing 14, a tight fit is provided. This iit should be tight enough so that when the hammer is rocked or pivoted, no sliding motion takes place between the bearing 14 and material 15.
  • the axis pin 17, which is slightly larger in diameter than the hole 19 is pressfitted into the hole 19, whereby the whole assembly forms an'integral unit with relative motion between the pin 17 and the hammer 7 being provided solely by deformation of the elastomeric material 315.
  • FIG. 5 is an assembled view of the components shown in PEG. 4 mounted in an operating assembly, wherein the center pin 17 is carried by stationary frame supports 24 and 25 and is held stationary by suitable means, such as a setscrew 26.
  • suitable means such as a setscrew 26.
  • FiG. 6 is a set of curves illustrating the characteristics of the hammer-bearing assembly of the present invention in comparison with hammer-bearings of prior types.
  • the Timeof-Flight is shown on the vertical scale while Millions-of-Operations is used as the horizontal scale.
  • Time-of-l light for the assembly in accordance with the present invention shows very much smaller deviations from a constant value, as indicated by the curve labeled Present invention. These curves are typical of the reat improvement provided by bearings constructed in accordance with the present invention.
  • the frame (identified in FIG. 5 by the numerals 2.4 and 25) may be structurally weaker providing a saving in material.
  • a distinctive advantage which was discovered to be available in an assembly of the invention is the sharper and more consistent impressions that are made by the print type on the paper. It is believed that this advantage is realized because of the slight rocking action which is developed in the hammer (similar to the action obtained by rocking a hand stamp before removing it from the paper).
  • the elastomeric member separates the shaft rom the hammer both electrically and electrolytically, as will be understood readily.
  • a high speed printer adapted for repeated use at high speeds having a continuously moving type-supporting element

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  • Rotary Presses (AREA)
  • Impact Printers (AREA)
US146560A 1961-10-20 1961-10-20 Printer hammer assembly Expired - Lifetime US3110250A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR1317862D FR1317862A (enrdf_load_stackoverflow) 1961-10-20
US146560A US3110250A (en) 1961-10-20 1961-10-20 Printer hammer assembly
GB963/62A GB976586A (en) 1961-10-20 1962-01-10 Improvements in or relating to printer hammer assemblies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US146560A US3110250A (en) 1961-10-20 1961-10-20 Printer hammer assembly

Publications (1)

Publication Number Publication Date
US3110250A true US3110250A (en) 1963-11-12

Family

ID=22517945

Family Applications (1)

Application Number Title Priority Date Filing Date
US146560A Expired - Lifetime US3110250A (en) 1961-10-20 1961-10-20 Printer hammer assembly

Country Status (3)

Country Link
US (1) US3110250A (enrdf_load_stackoverflow)
FR (1) FR1317862A (enrdf_load_stackoverflow)
GB (1) GB976586A (enrdf_load_stackoverflow)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3172353A (en) * 1963-06-17 1965-03-09 Data Products Corp Variable force hammer high speed printer
US3177803A (en) * 1963-08-02 1965-04-13 Potter Instrument Co Inc Print hammer module and control block therefor
US3195453A (en) * 1962-12-26 1965-07-20 Potter Instrument Co Inc Magnetically actuated print hammer
US3266418A (en) * 1963-12-02 1966-08-16 Anelex Corp Print hammer assembly for high speed printers
US3349696A (en) * 1965-08-16 1967-10-31 Potter Instrument Co Inc Hammer module assembly in high speed printers
US3364851A (en) * 1966-12-15 1968-01-23 Practical Automation Inc Data printing apparatus
US3385211A (en) * 1965-12-15 1968-05-28 Shepard Lab Inc Solenoid arrangement for high speed printer
US3417690A (en) * 1962-10-25 1968-12-24 Scm Corp Rolling contact printer hammer and hammer carriage
US3434413A (en) * 1967-01-06 1969-03-25 Int Computers & Tabulators Ltd Print hammer mechanisms for high speed printers
US3468246A (en) * 1967-01-06 1969-09-23 Int Computers & Tabulators Ltd Print hammers with electromagnetic actuating means
US3504623A (en) * 1968-04-03 1970-04-07 Itt Hammer arrangement for high-speed printers
US3568593A (en) * 1968-11-06 1971-03-09 Data Products Corp Hammer for impact printing device
US3696739A (en) * 1970-05-04 1972-10-10 American Regital Corp Striking apparatus for rotating wheel printer
US4120245A (en) * 1977-01-10 1978-10-17 Sanitary Scale Company Label printer
US4400106A (en) * 1974-11-29 1983-08-23 Patology Press, Ltd. Typesetting apparatus
US4501509A (en) * 1979-10-30 1985-02-26 Ricoh Company, Ltd. Printer carriage and hammer assembly
US4512674A (en) * 1979-10-30 1985-04-23 Ricoh Co., Ltd. Printer cartridge and cartridge retaining means
US4522122A (en) * 1983-05-03 1985-06-11 Ncr Canada Ltd - Ncr Canada Ltee Fast impact hammer for high speed printer
US4552475A (en) * 1979-10-30 1985-11-12 Ricoh Co., Ltd. Printer carriage and hammer assembly
US4557192A (en) * 1981-05-26 1985-12-10 International Business Machines Corporation Self restoring pivoting means and print hammer using same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1025204A (en) * 1911-03-20 1912-05-07 Sterling Typewriter Company Type-writer.
US2805620A (en) * 1951-12-15 1957-09-10 Rosen Leo Control means for high speed printing apparatus
US3003416A (en) * 1957-07-15 1961-10-10 Samuel M Langston Co Ductor roll mechanism for ink fountains

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1025204A (en) * 1911-03-20 1912-05-07 Sterling Typewriter Company Type-writer.
US2805620A (en) * 1951-12-15 1957-09-10 Rosen Leo Control means for high speed printing apparatus
US3003416A (en) * 1957-07-15 1961-10-10 Samuel M Langston Co Ductor roll mechanism for ink fountains

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3417690A (en) * 1962-10-25 1968-12-24 Scm Corp Rolling contact printer hammer and hammer carriage
US3195453A (en) * 1962-12-26 1965-07-20 Potter Instrument Co Inc Magnetically actuated print hammer
US3172353A (en) * 1963-06-17 1965-03-09 Data Products Corp Variable force hammer high speed printer
US3177803A (en) * 1963-08-02 1965-04-13 Potter Instrument Co Inc Print hammer module and control block therefor
US3266418A (en) * 1963-12-02 1966-08-16 Anelex Corp Print hammer assembly for high speed printers
US3349696A (en) * 1965-08-16 1967-10-31 Potter Instrument Co Inc Hammer module assembly in high speed printers
US3385211A (en) * 1965-12-15 1968-05-28 Shepard Lab Inc Solenoid arrangement for high speed printer
US3364851A (en) * 1966-12-15 1968-01-23 Practical Automation Inc Data printing apparatus
US3434413A (en) * 1967-01-06 1969-03-25 Int Computers & Tabulators Ltd Print hammer mechanisms for high speed printers
US3468246A (en) * 1967-01-06 1969-09-23 Int Computers & Tabulators Ltd Print hammers with electromagnetic actuating means
US3504623A (en) * 1968-04-03 1970-04-07 Itt Hammer arrangement for high-speed printers
US3568593A (en) * 1968-11-06 1971-03-09 Data Products Corp Hammer for impact printing device
US3696739A (en) * 1970-05-04 1972-10-10 American Regital Corp Striking apparatus for rotating wheel printer
US4400106A (en) * 1974-11-29 1983-08-23 Patology Press, Ltd. Typesetting apparatus
US4120245A (en) * 1977-01-10 1978-10-17 Sanitary Scale Company Label printer
US4501509A (en) * 1979-10-30 1985-02-26 Ricoh Company, Ltd. Printer carriage and hammer assembly
US4512674A (en) * 1979-10-30 1985-04-23 Ricoh Co., Ltd. Printer cartridge and cartridge retaining means
US4552475A (en) * 1979-10-30 1985-11-12 Ricoh Co., Ltd. Printer carriage and hammer assembly
US4629345A (en) * 1979-10-30 1986-12-16 Ricoh Co., Ltd. Printer cartridge and cartridge retaining means
US4557192A (en) * 1981-05-26 1985-12-10 International Business Machines Corporation Self restoring pivoting means and print hammer using same
US4522122A (en) * 1983-05-03 1985-06-11 Ncr Canada Ltd - Ncr Canada Ltee Fast impact hammer for high speed printer

Also Published As

Publication number Publication date
FR1317862A (enrdf_load_stackoverflow) 1963-05-08
GB976586A (en) 1964-11-25

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SPERRY CORPORATION

Free format text: LICENSE;ASSIGNOR:POTTER INSTRUMENT COMPANY, INC.;REEL/FRAME:004081/0286

Effective date: 19821015

Owner name: SPERRY CORPORATION, VIRGINIA

Free format text: LICENSE;ASSIGNOR:POTTER INSTRUMENT COMPANY, INC.;REEL/FRAME:004081/0286

Effective date: 19821015