US3915276A - Belt printer - Google Patents

Belt printer Download PDF

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Publication number
US3915276A
US3915276A US307677A US30767772A US3915276A US 3915276 A US3915276 A US 3915276A US 307677 A US307677 A US 307677A US 30767772 A US30767772 A US 30767772A US 3915276 A US3915276 A US 3915276A
Authority
US
United States
Prior art keywords
web
cylinder
printing
characters
tines
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
US307677A
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English (en)
Inventor
Jack L Metz
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.)
AT&T Teletype Corp
Original Assignee
Teletype 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 Teletype Corp filed Critical Teletype Corp
Priority to US307677A priority Critical patent/US3915276A/en
Publication of USB307677I5 publication Critical patent/USB307677I5/en
Application granted granted Critical
Publication of US3915276A publication Critical patent/US3915276A/en
Assigned to AT&T TELETYPE CORPORATION A CORP OF DE reassignment AT&T TELETYPE CORPORATION A CORP OF DE CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE AUG., 17, 1984 Assignors: TELETYPE CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B41J1/00—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies
    • B41J1/20—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies mounted on endless bands or the like
    • 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
    • B41J11/66—Applications of cutting devices
    • B41J11/70—Applications of cutting devices cutting perpendicular to the direction of paper feed
    • 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

Definitions

  • An impact mechanism prints directly on the outer coil of a web of paper using the web itself as a backing thereby obviating the use of a separate platen.
  • a pair of springs continuously urge the web against a pair of stops which are adjacent to the impact mechanism.
  • the impact mechanism includes a plurality of tines which are positioned to strike character dies against the web upon being struck by pins.
  • the pins are distributed in a single turn helix about a cylinder which is rotatably mounted on a pivoted bracket. The cylinder rotates to index the pins across the tines and reciprocates to strike the pins against the tines.
  • a pair of rollers are positioned to grip the paper being advanced from the web so that the paper may be manually brought into contact with and severed by a fixed blade.
  • an impact mechanism located entirely on one side of the printing plane is created by spacing a series of pins or the like about a cylinder to form a single-tum helix.
  • the pins are serially moved to printing modes along the paper by rotatably indexing the cylinder. After each index, the cylinder is then reciprocated to impact the pins against resilient tines which, in turn, strike dies to print characters on the paper.
  • the invention contemplates mounting a web of paper so that it is continuously urged into a printing plane in which an impact mechanism serially distributes information across the outer coil of the web using the web itself as a backing.
  • the impact mechanism includes a line of spaced projections helically distributed around a cylinder.
  • the cylinder is rotatably mounted on a pivoted bracket and uses a ratchet mechanism to index the projections into a printing mode each time the bracket piv- OtS.
  • bracket pivots, it causes the projections to strike serially the free ends of resilient tines which, in turn, strike character dies mounted on a selectively movable belt.
  • the character dies print directly on the web of paper as they are struck.
  • the paper from the web is severed into sheets by a fixed blade.
  • a pair of rollers are provided to grip the paper therebetween upon manually pulling the paper in the horizontal direction.
  • FIG. 1 is a perspective view of a printer embodying the principles of the present invention wherein the printer prints directly on the outer coil of a web of paper and wherein the printer utilizes a rotatable cylinder with a helical arrangement of pins to strike tines of a resilient comb in order to impact type dies against the outer coil of the web;
  • FIG. 2 is an enlarged side view taken along line 22 of FIG. 1, showing a ratchet and detent mechanism for rotating and positioning the cylinder upon which the pins are helically distributed;
  • FIG. 3 is a side view of a device used with the printer of FIG. 1 for severing .the paper from the web into sheets wherein the paper is gripped by a pair of rollers and severed by a cutting blade.
  • FIG. 1 there is partially illustrated a printer designated generally by the numeral 9, which supports a web of a carrier such as paper shown coiled around a filler 11 and mounted for rotation on a nonrotatable spindle 12 by a bearing 13.
  • the web 10 and filler l I serve as a backing against which an impact mechanism, designated generally by the numeral 14, impacts as it prints characters with belt-supported dies 15 on the outer coil 16 of the web.
  • the spindle 12 has a recess 17 formed in each end thereof, (only one of which is shown) in which is seated a spring 18 that biases the entire web '10 toward the impact mechanism 14.
  • Each spring 18 rests upon a platform 21 which is, in turn, positioned on a set of pins 22 that pass through bores 23 in its platform.
  • the pins 22 in each set are rigidly secured to a frame 24 which supports the entire printer 9, including the impact mechanism 14.
  • an adjustment screw 25 (only one of which is shown) is threaded in the frame 24 and abuts the lower surface of the corresponding platform 21. It is to be understood that the structure supporting the hidden right end of the spindle 12 is identical to the structure supporting the visible left end of the spindle.
  • the springs 18 urge the web of paper 10 against a pair of spaced, parallel rollers 26 which are rotatably secured to the frame 24 and define the printing plane of the printer 9.
  • the bias of the springs 18 slightly compresses the web of paper 10 to ensure a firm printing surface on which the impact mechanism 14 can record.
  • a printing belt 27 Positioned between the rollers 26 is a printing belt 27 which carries the character dies 15.
  • the printing belt 27 is trained positively about and supported by an idler pulley 28 and a drive pulley 29.
  • the drive pulley 29 is driven by a drive motor 31 that is controlled from a master controller 32 to position the character dies 15 in selected sequential locations across the web 10.
  • the master controller 32 can be of the type disclosed in U.S. Pat. No. 2,918,865 which issued to E. R. Wooding.
  • a conventional inked ribbon 33 supported by supply and take-up spools 34 and 35, is disposed between the printing belt 27 and the outer coil 16 of the web 10 to render impacts by the dies 15 visible.
  • a plurality of pallets 37 Positioned above the belt 27 and between the rollers 26-26 are a plurality of pallets 37, each of which corresponds to a printing space in a line of print across the outer coil 16 of the web of paper 10.
  • the pallets 37 are, in turn, each secured to the free end of a separate one of a plurality of tines 38.
  • the tines 38 are formed in a sheet of spring steel, or the like, to form a comb 39, the butt 45 of which is rigidly secured to the frame 24 of the printer.
  • a series of spaced pins 40 are arranged in a single turn helix about the outer surface of a cylinder 41.
  • the cylinder 41 is mounted on its longitudinal axis to a pair of flanges 42 in a steel bracket 43 and can rotate to position sequentially each pin 40 in a printing mode over an associated pallet 37. Consequently, as the cylinder 41 rotates, the pins 40 are progressively located over the line of pallets 37 in position to print a line of type across the outer coil 16 of the paper web 10.
  • the bracket 43 is mounted by pivots 44 to the frame 24 of the printer 9. As the bracket 43 pivots, it moves the cylinder 41 normal to its longitudinal axis carrying the pins 40 toward and away from the pallets 37.
  • the bracket 43 has a tab 46 projecting therefrom to which one end of a contractile spring 47 is attached. The other end of the spring 47 is attached to a projection 48 on the frame 24 so that the spring urges the bracket 43 in a clockwise direction about pivots 44 thereby moving the cylinder 41 and the pins 40 away from the pallets 37.
  • an electromagnet 49 is positioned beneath the bracket 43 to attract the bracket and rotate it counterclockwise, against the biasing action of the spring 47, upon receiving a print signal from the controller 32.
  • the bracket 43 is rotated counterclockwise, it causes a pin 40 vertically posed for printing to strike the associated pallet 37.
  • the electromagnet 49 is de-energized by the controller 32 and the spring 47 returns the bracket 43 to its initial position.
  • a stop 52 engages the frame 24 to limit clockwise movement of the bracket 43.
  • ratchet and detent mechanisms are illustrated for rotatively positioning the cylinder 41. It is noted that these mechanisms were not illustrated in FIG. 1 for purposes of clarity.
  • a ratchet pawl 53 engages a ratchet wheel 54 which is rigidly secured to the cylinder 41 for rotation therewith.
  • the ratchet pawl 53 is mounted to the frame 24 for pivotal movement about a pin 56 and is urged into engagement with the ratchet wheel 54 by a spring 57.
  • the bracket 43 is moved in a clockwise direction about the pivots 44 under the urging of the spring 47, the cylinder 41 and the ratchet wheel 54 are raised.
  • the interaction between the ratchet pawl 53 and the raising ratchet wheel 54 causes the wheel and the cylinder 41 to be rotated in a clockwise direction.
  • a detent 58 is pivoted on a pin 59 mounted on the bracket 43 and is urged into engagement with one of a plurality of indents 61 in the cylinder 41 by a compression spring 60.
  • Each indent 61 corresponds in circumferential location to one of the pins 40 and thereby corresponds to one space in the line to be printed on the web 10. Consequently, as the cylinder 41 is rotated, the detent 58 is permitted to move out of the indent 61. This permits the cylinder 41 to be moved through a sequence of positions which locate the pins 40 in succession over their respective pallets 37 in succession for printing.
  • the ratchet and detent mechanism operates as follows. As the spring 47 urges the bracket 43 clockwise, the ratchet wheel 54 is raised and the pawl 53 engages a tooth of the ratchet wheel causing the cylinder 41 to rotate clockwise until the stop 52 engages the frame 24 to prevent further rotation. At this time, the detent 58 engages the next successive indent 61 preventing further rotation of the cylinder 41.
  • the bracket 43 Upon energizing the electromagnet 49, the bracket 43 rotates in the counterclockwise direction about pivots 44 moving the cylinder 41 normal to the cylinders longitudinal axis and toward the pallets 37. Since the detent 58 is engaged with one of the indents 61, the cylinder 41 will not rotate and the ratchet pawl 53 will be cammed out of engagement with the teeth of the ratchet wheel 54. Oneof the pins 40 will be aligned with one of the pallets 37 and will strike that pallet as the bracket 43 rotates.
  • the electromagnet 49 is de-energized and the bracket 43 again rotates clockwise under the influence of the spring 47 causing the ratchet pawl 53 to rotate the ratchet wheel 54 and cylinder 41 as before.
  • a control signal is generated by the controller 32 to a paper advance motor 62, instructing the motor to rotate a resilient roller 63 in a counterclockwise direction.
  • the section 65 of paper extending away from the outer coil 16 of the web is urged by a second resilient roller 64 against the roller 63. This of course advances the extended section 65 of paper by pulling it from the web 10 and causing the web to uncoil and position fresh paper in the printing plane.
  • Selected lengths of the section 65 may be severed from the outer coil 16 by a paper cutting portion of the printer, designated generally by the numeral 70 and illustrated in FIG. 3.
  • the paper cutter is located downstream of the resilient rollers 63 and 64, comprising the paper advance mechanism.
  • the section 65 of the paper is advanced between a pair of light weight rollers 66 and 67 which have high friction surfaces 68 and 69, respectively, of rubber or the like, located thereon for engaging the paper.
  • the rollers 66 and 67 are mounted by pins 71 and 72, respectively, in slots 73 and 74, respectively, formed in the frame 24.
  • the slots 73 and 74 converge toward the downstream end of the section 65 of the paper so that ordinarily the upper roller 66 rests upon the section 65 lightly pressing the paper against the lower roller 67.
  • the section 65 of the paper While the section 65 of the paper is being advanced, it is pushed by the paper advance motor 62 between the rollers 66 and 67, causing them to rotate in opposite directions due to friction between the surfaces 68 and 69 and the paper. As the paper emerges from between the rollers 66 and 67, it falls downwardly in the direction of arrow 76. When it is desired to sever the leading portion of the section 65 of the paper, the paper is manually gripped and pulled in the horizontal direction as indicated by the dotted line. This causes the pins 71 and 72 to move downstream in the slots 73 and 74, and thus move rollers 66 and 67 slightly toward one another thereby securely gripping the section 65 of the paper disposed therebetween.
  • the controller 32 receives a print signal whereupon it positions a selected character die beneath the first pallet 37 which is located at the left end of the comb 39.
  • the controller 32 then energizes the electromagnet 49 and the first pin 40 strikes the first pallet 37 printing the first desired character into the first space on the prepositioned outer coil 16 of the paper.
  • the controller 32 then de-energizes the electromagnet 49 and the bracket 43 rotates clockwise thereby rotating the cylinder 41 one space with the ratchet and detent arrangement shown in FIG. 2 to position the next successive pin 40 over the second pallet 37.
  • the controller 32 then signals the drive motor 31 to position the second desired character die 15 beneath the second pallet 37 and energizes the electromagnet 49.
  • the electromagnet 49 is again energized to print the second character into the second space on the outer coil 16 of the paper. The process continues until an entire line of print is recorded. If a blank space is desired, blank areas are provided on the printing belt 27 so that nothing will be recorded when the pin 40, which is in position for recording, strikes its associated pallet 37.
  • the controller 32 signals the paper advance motor 62 to advance the paper one or more spaces. A new line is now ready for printing after the complete message is recorded.
  • the means for urging the web comprises a spindle upon which the web is mounted and a pair of springs engaging each end of the spindle to urge the spindle toward the impact mechanism.
  • a cylinder mounted for rotation about its longitudinal axis
  • the apparatus of claim 3 further including a plurality of resilient tines aligned with preselected spaces on the material and having pallet portions thereon for printing the characters upon being struck by said impactmg means.
  • the impacting means comprises a plurality of spaced pins arranged in a single turn helix about the cylinder and wherein the pins are sequentially aligned with individual tines as the cylinder rotates.
  • a blade positioned downstream of the rollers to sever a sheet from the material upon engaging the material.
  • the means for mounting the rollers includes pins projecting from each end of each roller wherein the pins engage slots which converge in a direction downstream of the web.
  • a carrier for moving the dies selectively across and adjacent to the printing plane; 1 a plurality of resilient tines aligned with preselected spaces in the printing plane but positioned on the opposite side of the dies wherein said tines have portions thereon for striking the dies;
  • the severing means includes means for restraining advancement of the material upon applying a pulling force to the material downstream of the severing means to thereby prevent the force from being transmitted back to the coiled web.
  • an impactor means comprises a plurality of equally spaced apart and outwardly projecting impacting elements disposed in a single turn helix on the surface of a cylinder rockably mounted for impacting selected ones of a linear array of characters for printing, the improvement comprisa carrier for the characters mounted for transverse movement relative to and along a line on a web on which printing is to be effected;
  • each pallet corresponds to a printing space in a line of print across the web and is sequentially aligned with successive impacting elements as the cylinder rotates for printingly impacting the characters;
  • a magnet fixed relative to the comb for selectively attracting the bracket to draw the cylinder toward the pallet.

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US307677A 1972-11-17 1972-11-17 Belt printer Expired - Lifetime US3915276A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US307677A US3915276A (en) 1972-11-17 1972-11-17 Belt printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US307677A US3915276A (en) 1972-11-17 1972-11-17 Belt printer

Publications (2)

Publication Number Publication Date
USB307677I5 USB307677I5 (en)) 1975-01-28
US3915276A true US3915276A (en) 1975-10-28

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4235360A (en) * 1978-07-31 1980-11-25 Xerox Corporation Bi-directional pin feed apparatus
US4444522A (en) * 1981-07-08 1984-04-24 Hitachi Koki Co. Ltd. Paper clamp device for a printer
US4961376A (en) * 1986-06-03 1990-10-09 Seiko Epson Corporation Printer

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US765532A (en) * 1903-10-13 1904-07-19 James Dundas White Type-writing machine.
US1191697A (en) * 1915-06-24 1916-07-18 Charles K Ash Printing device.
US2152031A (en) * 1936-12-28 1939-03-28 Neil B Currier Roll paper cutter
US2918865A (en) * 1957-12-27 1959-12-29 Ibm Chain printer timer
US3113509A (en) * 1960-01-11 1963-12-10 Ibm Type belt device
US3651915A (en) * 1968-11-07 1972-03-28 Olympia Werke Ag Printing mechanism for electrically operated office machines
US3698529A (en) * 1970-07-14 1972-10-17 Honeywell Inf Systems Serial printer with fixed interposer

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US765532A (en) * 1903-10-13 1904-07-19 James Dundas White Type-writing machine.
US1191697A (en) * 1915-06-24 1916-07-18 Charles K Ash Printing device.
US2152031A (en) * 1936-12-28 1939-03-28 Neil B Currier Roll paper cutter
US2918865A (en) * 1957-12-27 1959-12-29 Ibm Chain printer timer
US3113509A (en) * 1960-01-11 1963-12-10 Ibm Type belt device
US3651915A (en) * 1968-11-07 1972-03-28 Olympia Werke Ag Printing mechanism for electrically operated office machines
US3698529A (en) * 1970-07-14 1972-10-17 Honeywell Inf Systems Serial printer with fixed interposer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4235360A (en) * 1978-07-31 1980-11-25 Xerox Corporation Bi-directional pin feed apparatus
US4444522A (en) * 1981-07-08 1984-04-24 Hitachi Koki Co. Ltd. Paper clamp device for a printer
US4961376A (en) * 1986-06-03 1990-10-09 Seiko Epson Corporation Printer
US5033886A (en) * 1986-06-03 1991-07-23 Seiko Epson Corporation Printer

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Publication number Publication date
USB307677I5 (en)) 1975-01-28

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Date Code Title Description
AS Assignment

Owner name: AT&T TELETYPE CORPORATION A CORP OF DE

Free format text: CHANGE OF NAME;ASSIGNOR:TELETYPE CORPORATION;REEL/FRAME:004372/0404

Effective date: 19840817