US3433153A - Printer with swiveling pushrods - Google Patents

Printer with swiveling pushrods Download PDF

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Publication number
US3433153A
US3433153A US694585A US3433153DA US3433153A US 3433153 A US3433153 A US 3433153A US 694585 A US694585 A US 694585A US 3433153D A US3433153D A US 3433153DA US 3433153 A US3433153 A US 3433153A
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US
United States
Prior art keywords
print
hammers
pushrods
hammer
printer
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
US694585A
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English (en)
Inventor
Richard H Harrington
Michael A Henkel
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
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Publication of US3433153A publication Critical patent/US3433153A/en
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
    • G03G5/02—Charge-receiving layers
    • G03G5/04—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
    • G03G5/043—Photoconductive layers characterised by having two or more layers or characterised by their composite structure
    • G03G5/047—Photoconductive layers characterised by having two or more layers or characterised by their composite structure characterised by the charge-generation layers or charge transport layers
    • 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
    • B41J9/10—Hammers; Arrangements thereof of more than one hammer, e.g. one for each character position
    • B41J9/12—Hammers; Arrangements thereof of more than one hammer, e.g. one for each character position each operating in more than one character position
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
    • G03G5/02—Charge-receiving layers
    • G03G5/04—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
    • G03G5/08—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor characterised by the photoconductive material being inorganic
    • G03G5/082—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor characterised by the photoconductive material being inorganic and not being incorporated in a bonding material, e.g. vacuum deposited

Definitions

  • the invention relates to printers having spaced apart print hammers which are movable to print in the extreme and intervening spaces.
  • Another object of the invention is to provide in a printer for pivotally mounting a pushrod at one end adjacent an actuating electromagnet, and for operatively connecting the other end to move with a movable hammer support for operating a single print hammer in a plurality of diiferent print positions.
  • Yet another object of this invention is to provide for pivotally mounting a plurality of print hammers in slots in a movable support, and for actuating the hammers by means of slender pushrods which are slidably disposed in elongated guides pivotally supported adjacent to the actuating armature of an electromagnet at one end, and secured at the other end relative to the movable support by portions of the guide interfitting with the slots in which the hammers are mounted.
  • a plurality of print hammers are disposed along a print line at every other one of a plurality of print positions, being pivotally supported in slots in an elongated support member which is itself movable along the print line.
  • the support memice her is slidably disposed on a bar, and is moved to position the hammers in the intervening and extreme print positions by means of a rack and pinion structure driven by a stepping motor.
  • the print hammers are actuated by stationary print magnets individual to each hammer, having pushrods which are disposed in guides having one end pivotally mounted adjacent the armature of its electromagnet, and the other end secured relative to the movable support by a projecting portion interfitting in the slot in which its associated hammer is positioned.
  • FIGURE 1 is a partial plan view of a print hammer operating mechanism embodying the invention in one of its forms
  • FIGURE 2 is a front elevational view in part of the same mechanism shown in FIGURE 1, showing the motor,
  • FIGURE 3 is a side elevational view partly in section of the hammer operating mechanism of FIGURES 1 and 2,
  • FIGURE 4 is an enlarged partial view of a portion of movable support and pushrod guide shown in FIGURE 3,
  • FIGURE 5 is an enlarged partial plan view of the same portion of the movable support and pushrod guide mechanism shown in FIGURE 4,
  • FIGURE 6 is a schematic plan view of a portion of an alternate print hammer and pushrod structure showing a different form of the invention.
  • FIGURE 7 is an enlarged partial plan view of the pushrod and hammer mechanism of FIGURE 6 showing in detail the end portions of the pushrod structure.
  • FIGURES l, 2 and 3 of the drawings are partial, plan, front elevation, and side elevation views, respectively, of a printer apparatus of one type with which the present invention may be used.
  • the structure shown is substantially identical with that in the James M. Cunningham patent hereinbefore referred to, and as therein shown, printing occurs when any one of a plurality of print hammers 12 are actuated by means of pushrods 14.
  • the pushrods have enlarged end portions 15 of polyurethane or the like, and are slidably disposed in elongated guide members 16 and 16' extending from adjacent pivotally mounted operating armatures 18 of electromagnetic actuating means including an electromagnetic core 20 and -a solenoid operating winding 22 (shown in part) for attracting the arm-ature 18 to adjacent their associated hammers, for guiding the pushrods 14 to enable them to actuate their respective print hammers 12.
  • the pushrods 14 with their respective guide members 16 and 16' are substantially identical, the primed numbered pushrods and guide members being slightly longer, so that their actuating means may be located to the rear of the actuating means for the pushrods 14, to facilitate maximum utilization of the available space.
  • the structure of the present invention is not limited to a back printer and the hammers 12 may be used either to impact a document and ribbon against type characters on a movable type character supporting member as in the Cunningham patent, or they may be used to actuate a movable type character bearing element on a chain, train or belt against a document and a suitable ribbon as in a front printer.
  • the print hammers 12 of the present invention are disposed to be positioned in spaced apart relation, being for example, positioned in every other print position or some other similar arrangement such as in every third or every fourth print position.
  • the print hammers 12 are positioned in slots 24 which are uniformly spaced along a substantially vertical web or flange 28 of a movable support member 26 and which extends substantially the length of the support, the slots being, for example, so spaced as to be located opposite alternate print positions.
  • the support member 26 extends substantially the length of the print line, and may comprise a lower body portion 30 positioned along the lower edge of the web 28, and having an elongated cylindrical opening 32 extending throughout the length thereof for receiving a rod or tube 34 which is rigidly mounted to a fixed portion of the printer frame 36 for providing a support on which the support member 26 may slide longitudinally,
  • the body portion 30 is provided with a depending tab 36 positioned intermediate its ends, and to which may be secured by means of a bolt 38, a guide roller 40 for engaging the under surface 41 of a fixed guide member 42 projecting from another portion 44 of the frame of the machine.
  • the roller 40 and the guide 42 provide mating surfaces which resist counterclockwise rotation of the support member 26 about the support rod 34, and maintain it in substantially the operating position shown in FIGURE 3.
  • Movement of the support member along the support rod 34 may be obtained by means of a rack and pinion strutcure comprising rack teeth 49 on a downwardly projecting tab or flange 48 on the underside of the body 30 of the support member, which mesh with teeth 52 on a clamp type pinion member 51 secured to the shaft 54 of a stepping motor shown generally at 56.
  • a rack and pinion strutcure comprising rack teeth 49 on a downwardly projecting tab or flange 48 on the underside of the body 30 of the support member, which mesh with teeth 52 on a clamp type pinion member 51 secured to the shaft 54 of a stepping motor shown generally at 56.
  • each of the hammers 12 comprises generally a hammer shaped head portion 66 for impacting a document or type bearing element, and a central stem portion 68 having at the lower end an enlarged boss 69 for receiving an elongated pivot pin 70 upon which the hammer 12 pivots.
  • the pin 70 is disposed on the support member 26 by being positioned in an elongated slot 71 extending along the front side of the web 28 of the sup port member.
  • Each hammer is provided with a depending tab 72 at the lower end of the boss 69 for engaging a restoring spring 74 positioned in a recess 76, which may be drilled or otherwise provided in the support member adjacent the lower end of the slot 24.
  • the pivot pin 7 t is retained in the slot 71 by means of fingers projecting from clamp plates 82 secured to the web of the support member 26 by means of screws 84.
  • the support member 26 Since the support member 26 is movable longitudinally of the support rod 34, provision must be made for maintaining alignment of the pushrods 14 with their respective hammers 12 when the support member is moved to different operating positions.
  • the pushrods have their guide members 16 and 16 provided with depending pivot pins 88 projecting downwardly from the guide members '16 and 16' adjacent the armature 18.
  • the pivot pins 88 and 88' may be disposed in openings 90 and of stationary support members 92 and 92 extending longitudinally along the print line.
  • the other ends of the guide members 16, 16' are maintained in operating relation with their respective hammers 12 by means of horizontally projecting flange portions 94, as shown in FIGURES 3, 4 and 5, which extend beyond the end of the guide members 16 and 16', being positioned, for example, in a horizontally extending slot 96 on the back side of the support member 26.
  • the flange 94 is provided with a depending central web portion 98 which is slightly narrower than the associated slot 24 in which it is positioned, and has a rounded or bulbous end portion 100 which provides a relatively snug fit in the slot 24.
  • This arrangement permits stepping of the support member 26 in one or more steps to different intervening and extreme print positions without any binding of the guides 16, 16 in the slots 24, while the pivoted ends of the pushrods guides 16 and 16' adjacent the arrnatures '18 readily pivot in their stationary support members 92 and 92', as the opposite ends adjacent the hammers 12 follow the hammers as the support member 26 increments.
  • hammers 12 With the support member 26 located in an initial print position, different ones of the hammers 12 may be positioned opposite the odd numbered print positions 1-3-5-7, etc.
  • the hammers 12 may be selectively actuated by energizing the operating windings 22 under the control of suitable printer control means until all the characters on the movable type carrying chain, train or belt have been presented to each print position having a hammer opposite it, so as to be optioned for printing.
  • the motor 56 may he stepped by suitable control means (not shown) to move the print hammers to the intervening or even numbered print positions in which a similar optioning of the print hammers may occur, until each and every character has been optioned to each and every print hammer for printing the even positions, whereupon the printing operation will be terminated and the stepping motor 56 again energized to either return the support member directly to its original or initial operating position, or increment it in steps back to the initial position in a plurality of printing operations in a reverse sequence.
  • FIGURES 6 and 7 it will be seen that instead of utilizing the pushrod arrangement of a slender pushrod slidably disposed in a guide member as shown in FIGURES 1-5 of the drawings, flat rod-like pushrod members may be utilized, each having a slot or groove 112 at the left end for receiving the central stem portion 68 of a print hammer, and having rounded end portions 114 at the opposite ends for being engaged by the armature 118 of an electromagnetic actuating means.
  • Means such as the stationary side members 115 may be positioned adjacent the end portion 114 to maintain this end of the pushrod 110 in operating relation with a related armature 118.
  • the rounded end portion 114 permits swiveling of the pushrod 110 when the print hammers are incremented to intervening print positions, without changing the effective operating length of the pushrod.
  • the sidewalls of the slots 112 may be rounded as shown in FIGURE 7, as well as the inner end of the slot so that continuous contact may be maintained with the stem portion 68 of the hammer as it increments from one position to another as shown by the relationship illustrated in dotted lines in FIGURES 6 and 7.
  • a pushrod 110 such as the one shown may be provided for each of positions 15913-17, etc., along the print line, with the print hammers in an initial position.
  • the pushrods 110 When the print hammers 12 are moved to the next print position, the pushrods 110 will be positioned in positions 2-6-10-14-18, etc.; in the third operating position of the print hammers, the pushrods 110 Will be positioned at print positions 37l l15l7 etc., While in the fourth or final print position the pushrods 110 will be positioned at print positions 4-8-10-16-20, etc.
  • the print hammers may be returned to the initial position and the document moved for printing the next line, or the document may be advanced, and the print hammers incremented step by step in the reverse direction, for performing printing operations in each of the print positions as they are returned to the initial position.
  • the present invention provides a simple and effective multiple spaced print hammer arrangement for a printer.
  • the maximum utilization of the operating mechanism may be obtained while the mass of the moving part of the mechanism which has to be incremented to cover the extreme and intervening print positions, is kept to a minimum.
  • spaced apart print hammers and incrementing them in one or more steps to the intervening print positions a great reduction in the amount of electronics utilized may be effected, together with the economies provided thereby.
  • swiveling pushrods for transmitting the action of the electromagnetic actuating means to the print hammers, variations in print quality and errors in print timing are kept to a minimum.
  • a print hammer pivotal toward said type element to impact a document and selected type characters, a support movable along the print line pivotally supporting said hammer at one of the print positions,
  • stationary actuating means having an actuating mem ber movable in the direction of pivotal movement of the associated hammer
  • a printer as defined in claim 3 characterized by the movable support having a plurality of slots positioned opposite spaced apart print positions and each having a pivotally mounted hammer and associated actuating means.
  • a printer as defined in claim 4 characterized by the guide member having a vertical web positioned in the hammer slot of the movable support and a horizontal flange positioned in a horizontal slot along the adjacent side of the movable support.
  • a printer as defined in claim 1 characterized by the pushrod having a slot providing an interfitting relation with the hammer at one end, and having an accurate surface at the other end engaged by the actuating means.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Impact Printers (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
US694585A 1967-12-29 1967-12-29 Printer with swiveling pushrods Expired - Lifetime US3433153A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US69458567A 1967-12-29 1967-12-29

Publications (1)

Publication Number Publication Date
US3433153A true US3433153A (en) 1969-03-18

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Application Number Title Priority Date Filing Date
US694585A Expired - Lifetime US3433153A (en) 1967-12-29 1967-12-29 Printer with swiveling pushrods

Country Status (9)

Country Link
US (1) US3433153A (de)
BE (1) BE724115A (de)
CH (1) CH473682A (de)
DE (1) DE1815204B2 (de)
ES (1) ES361375A1 (de)
FR (1) FR1600502A (de)
GB (1) GB1243020A (de)
NL (1) NL6817813A (de)
SE (1) SE343797B (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3672297A (en) * 1970-06-30 1972-06-27 Ibm Printing control device in high speed chain printer with hammers movable to plural print positions
JPS4838030A (de) * 1971-09-10 1973-06-05 Triumph Werke Nuernberg Ag
US3782278A (en) * 1970-12-11 1974-01-01 Tally Corp Impact line printer
US3919933A (en) * 1973-10-05 1975-11-18 Potter Instrument Co Inc High speed printer
US3994219A (en) * 1973-10-25 1976-11-30 Citizen Watch Co., Ltd. Printer
US4064800A (en) * 1976-03-01 1977-12-27 Sperry Rand Corporation Printer device using time shared hammers
US4230039A (en) * 1977-05-20 1980-10-28 Citizen Watch Company Limited Drum printer with helically arranged type sets
US4442770A (en) * 1982-04-21 1984-04-17 U.S. Terminals, Inc. Pushrod for high speed

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2629592C2 (de) * 1976-07-01 1986-04-17 Ibm Deutschland Gmbh, 7000 Stuttgart Druckhammer für Typendrucker

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3012499A (en) * 1957-09-26 1961-12-12 Amada Sanae High speed printing system
US3135195A (en) * 1961-06-22 1964-06-02 Potter Instrument Co Inc High speed printer with moving characters and single hammer
US3220343A (en) * 1960-11-25 1965-11-30 Potter Instrument Co Inc High speed printers with column spanning hammers
US3241480A (en) * 1963-03-28 1966-03-22 Ibm Print hammer mechanism and pressure control means in high speed printers
US3253539A (en) * 1963-09-16 1966-05-31 Clary Corp Driving and supporting means for high speed printing drum
US3332343A (en) * 1966-06-20 1967-07-25 Andelex Corp Selective hammer interposing means in high speed printers
US3364852A (en) * 1965-11-12 1968-01-23 Friden Inc High-speed print drum with traveling print hammer

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3012499A (en) * 1957-09-26 1961-12-12 Amada Sanae High speed printing system
US3220343A (en) * 1960-11-25 1965-11-30 Potter Instrument Co Inc High speed printers with column spanning hammers
US3135195A (en) * 1961-06-22 1964-06-02 Potter Instrument Co Inc High speed printer with moving characters and single hammer
US3241480A (en) * 1963-03-28 1966-03-22 Ibm Print hammer mechanism and pressure control means in high speed printers
US3253539A (en) * 1963-09-16 1966-05-31 Clary Corp Driving and supporting means for high speed printing drum
US3364852A (en) * 1965-11-12 1968-01-23 Friden Inc High-speed print drum with traveling print hammer
US3332343A (en) * 1966-06-20 1967-07-25 Andelex Corp Selective hammer interposing means in high speed printers

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3672297A (en) * 1970-06-30 1972-06-27 Ibm Printing control device in high speed chain printer with hammers movable to plural print positions
US3782278A (en) * 1970-12-11 1974-01-01 Tally Corp Impact line printer
JPS4838030A (de) * 1971-09-10 1973-06-05 Triumph Werke Nuernberg Ag
US3797387A (en) * 1971-09-10 1974-03-19 Triumph Werke Nuernberg Ag High speed printer
US3919933A (en) * 1973-10-05 1975-11-18 Potter Instrument Co Inc High speed printer
US3994219A (en) * 1973-10-25 1976-11-30 Citizen Watch Co., Ltd. Printer
US4064800A (en) * 1976-03-01 1977-12-27 Sperry Rand Corporation Printer device using time shared hammers
US4230039A (en) * 1977-05-20 1980-10-28 Citizen Watch Company Limited Drum printer with helically arranged type sets
US4442770A (en) * 1982-04-21 1984-04-17 U.S. Terminals, Inc. Pushrod for high speed

Also Published As

Publication number Publication date
DE1815204B2 (de) 1971-09-16
SE343797B (de) 1972-03-20
ES361375A1 (es) 1970-08-16
FR1600502A (de) 1970-07-27
GB1243020A (en) 1971-08-18
CH473682A (de) 1969-06-15
DE1815204A1 (de) 1969-08-07
BE724115A (de) 1969-05-02
NL6817813A (de) 1969-07-01

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