US3570736A - Paper tension and registration apparatus - Google Patents

Paper tension and registration apparatus Download PDF

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Publication number
US3570736A
US3570736A US789341A US3570736DA US3570736A US 3570736 A US3570736 A US 3570736A US 789341 A US789341 A US 789341A US 3570736D A US3570736D A US 3570736DA US 3570736 A US3570736 A US 3570736A
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United States
Prior art keywords
drive
shafts
plate
paper
shaft
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Expired - Lifetime
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US789341A
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English (en)
Inventor
Raymond A Skiba
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Unisys Corp
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Burroughs Corp
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Assigned to BURROUGHS CORPORATION reassignment BURROUGHS CORPORATION MERGER (SEE DOCUMENT FOR DETAILS). DELAWARE EFFECTIVE MAY 30, 1982. Assignors: BURROUGHS CORPORATION A CORP OF MI (MERGED INTO), BURROUGHS DELAWARE INCORPORATED A DE CORP. (CHANGED TO)
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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
    • 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
    • B41J11/36—Blanking or long feeds; Feeding to a particular line, e.g. by rotation of platen or feed roller
    • B41J11/42—Controlling printing material conveyance for accurate alignment of the printing material with the printhead; Print registering
    • B41J11/44—Controlling printing material conveyance for accurate alignment of the printing material with the printhead; Print registering by devices, e.g. programme tape or contact wheel, moved in correspondence with movement of paper-feeding devices, e.g. platen rotation

Definitions

  • Adjusting the phase relationship between the shafts results in a corresponding change in the tension ofthe web being advanced and/or in the registration between the web and the format tape, respectively.
  • a pulley arrangement varies the respective lengths of the parts of the drive means between the shafts, and one shaft experiences a different rotation or phase adjustment relative to the other.
  • This invention relates generally to adjusting the phase or amount of rotation between at least two rotating members. lt is particularly useful when employed in conjunction with a machine for advancing web material of indeterminate length through a work area for performing operations on the web material under the control of a format on an endless tape. rfhese operations on the web material may takeA several forms. lt may be desired, for example, to cutor punch the material, or to'print on the material. Usually, these operations are performed on the web material by moving it relative to a work station. In view of this particular utility the invention will be described as being incorporated in one species of such a machine a high-speed printer used as the output of a data processing system.
  • the web or paper is usually perforated and is gripped and advanced by sets of flexible endless tractors, each tractor having pins for positive engagement with the perforations in the paper.
  • sets of flexible endless tractors each tractor having pins for positive engagement with the perforations in the paper.
  • two sets of tractors are employed, one set on each side of the printing area, thereby providing positive control of the paper as it is advanced through the printing area.
  • Both sets of tractors and the format tape are usually driven in synchronism, and information on the format tape controls the intermittent advance of the paper.
  • Another object of the invention is to provide an improved apparatus for adjusting paper tension in a high-speed printer.
  • lt is another object of my invention to provide an apparatus for adjusting registration between the format tape and the paper in a high-speed printer.
  • lt is a further object to provide a paper tensioning and regis tration apparatus which utilizes a simpler geometrical configuration thereby providing more positive control of paper tension and registration, less wear and tear von the drive means and greater reliability.
  • the apparatus includes a plate, preferably mounted on one shaft, and idler rollers or guide means mounted on the plate'.
  • a plate preferably mounted on one shaft, and idler rollers or guide means mounted on the plate'.
  • HG. l is an overall perspective view of part of a high-speed printer controlled by format information on a tape, in which the subject of this invention is shown as a part thereof;
  • FlG. 2 is a side view of a portion of the printer of FlG. i showing the improvement which is the improvement which is the subject of this invention;
  • FIG. 3 is a side view of a portion of the printer of FIG. l., showing, in greater detail, a portion of the adjusting apparatus of Fi-G. 2;
  • FIG. 4 is a cross-sectional view taken along line 4 4 of FIG. 3 showing the detailed structure of the apparatus described herein.
  • DESCRIPTION OF THE PREFERRED EMBOQIMENT FlG. l shows generally the elements of a high-speed printer associated with data processing equipment. Paper il of indeterminate length is advanced through the printing machine by two sets of drive tractor assemblies. The upper set of drive tractors i3 is driven by the square drive shaft 25 and is supported by shaft 2i. A lower set of drive tractors l5 is driven by a similar square drive shaft 27 and shaft 23 supports the lower tractor assembly. Each of these four drive tractors includes an endless flexible belt carrying paper-engaging pins 17. The pins are spaced around each of the drive tractor belts and are shown at the left lower drive tractor l5. The pins engage the margin holes or perforations 19 of paper 11 with pressure plate M of eacii tractor assembly holding the paper secure to assure penetration by the pins. The location of the four drive tractors defines the work area ofthe high-speed printer.
  • Format tape 101 which controls the paper advance as disclosed in the aforementioned copending application of Funk et ai. is driven by sprocket 99 in synchronism with paper li, and carries control information which determines where the paper shall be stopped to receive printing.
  • Conventional tape reader 97 converts the infomation on format tape 101 into electronic pulses in a well-known manner. The pulses control a source of motive power (not shown) to drive pulley 28 which drives pulley 35 by a power transmitting belt 34.
  • Shaft di is journaled in a sprocket 99 and is joumaled in wheei 39.
  • Drive belt 33 driven by pulley 35, advances the paper and the format tape in synchronism as will be described in detail hereinafter.
  • the printing station (not shown), defined by the upper and lower sets of drive tractors, is generally of a well-known variety employing a rotating drum type carrier on one side of paper il and electromagnetically controlled print hammers on the other side of the paper.
  • Paper tension may be manuaiiy adjusted by removing the paper from one set of tractors and sliding it so that different holes i9 are in contact with pins on each of the tractors.
  • it is desirable to obtain a finer adjustment of the paper tension for reasons previously indicated. lt can be seen that if either drive shaft or 27 is rotated slightly relative to the other shaft the tension of paper 11 between the upper and lower tractors will be affected.
  • Upper drive pulley 29 has teeth to engage toothed belt 33, and upper square drive shaft 25 is journaled in pulley 29.
  • drive pulley 29 When drive pulley 29 is rotated by belt 33 it imparts motion to the upper set of drive tractors i3.
  • lower square drive shaft 27 is joumaled into toothed drive pulley 3l, and when drive belt 33 causes pulley 3l to rotate, motion is imparted to the lower set of drive tractors 15. Since belt 33 is common to these two drive pulleys the upper and lower tractor pairs are driven in synchronism.
  • FIG. 2 shows the end view of the paper tension and registration apparatus of FIG. 2.
  • belt 33 drives pulleys 29 and 3l which, in turn, rotate shafts 25 and 27, respectively, for example, in a counterclockwise direction.
  • shafts 25 and 27 By changing the phase relationship or phasing between shafts 25 and 2? a corresponding change in the paper tension will result.
  • Applicant has provided a new and improved means for changing the angular rotation of one shaft with respect to the other shaft. Although this may be accomplished either while the belt 33 is moving or stationary the principles of the invention will be described while the belt is moving.
  • a stud 57 positioned in the printer frame 67, cooperates with an oversize hole 55 in piate 5i to limit the rotational movement of the plate 5l.
  • FIG. 3 illustrates the cooperation between stud 57 and the periphery of aperture 5S when plate 5i has been rotated to the limit of counterclockwise rotation. if this rotation is insufficient to eect the necessary paper tension the machine should be stopped, the
  • shafts 63 and 65 are joumaled in rollers 47 and 49, respectively.
  • the shafts are mounted on plate 5l.
  • a ring-shaped housing 59 is secured to machine frame 67 coaxially to drive shaft 27.
  • a ring bearing 6l allows the plate 5l to be rotated about the axis of shaft 27 independently of housing 59 and frame 67.
  • Control shaft 69 includes a helical gear 7l intermediate its ends which engages teeth 73 of the plate Sil.
  • Knob 53 is attached to shaft 59 and by turning knob 53 to rotate shaft 69, gear 7l cooperates with teeth 73 to rotate plate 51.
  • the control shaft 69 is joumaled in retaining blocks 75 and 77 which are attached to machine frame 67.
  • An enlarged portion 79 of shaft 60 is retained by washer 81 and locltnuts d3 and 85 against block 77 to prevent the shaft 69 from having any substantial axial movement.
  • Lower paper tractor drive shaft 27 is joumaled in a housing 89 and allowed to rotate independently of Plate 5l.
  • the square tractor drive shaft 27 is fitted with a cylindrical sleeve 87 in order to provide a round surface for contact with beatings 91.
  • Drive shaft 27, sleeve 87 and drive pulley 3l are maintained in position for simultaneous and equal rotation by pin 93.
  • lt is often desirable to have an adjustment on shaft 69 to vary the amount of torque necessary to turn the shaft for rotating plate 5l.
  • boclcnuts 83 and 85 allow adjustment of the frictional engagement of the shaft 69 with retaining block. 77. Added torque is obtained by tightening nut S3 which induces a force on the faces of frictional washer 8l. When the desired torque is obtained, nut 85 is tightened .against nut 83 to lock the latter in plate.
  • gear 39 is mounted on a plate 5l' along with rollers 47' and 49.
  • Drive belt 33 is looped around roller 47 drive gear 39, and roller 49 to form a bight with the drive gear 39 in the center of the bight.
  • Shaft 63' is joumaled in roller 47 and shaft 65 is joumaled in roller a9' and the shafts are mounted on plate 5l Shaft 4l, joumaledv in drive gear 39, is mounted on plate 51', and plate 511 is mounted on frame 67 and is capable of rotation independent of' shaft di. Therefore, in a manner similar to that described with respect to the idler arrangement of plate 5i, if it is considered that belt 33 is moving in a counterclockwise direction, counterclockwise rotation of plate 5l' will effectively lengthen the segment of the belt by an amount X from gear 29 past roller 47 to gear 39 and will effectively shorten the segment of the belt from drive gear 35 past roller 49 to drive gear 39 by an equal amount X.
  • gear 39 will be advanced an additional amount as the change in the belt length X passes around gear 39, thereby increasing the distance that the format tape moves by a phase change i0., as in the prior discussion.
  • Plate 5H' has an aperture 55 therein and limit stud 57' is mounted in frame 67 to limit the rotational 'motion of plate 5B
  • the drive means for turning plate 5 i' is substantially. the same as the drive means for turning plate 5f.
  • a knob 53' is mounted on one end of shaft 69 and a helical gear 7l' is mounted at the opposite end of the shaft. The gear engages teeth 73' in plate 5l' to rotate plate 51' with respect to the center of shaft 451.
  • Retaining blocks 75' and 77' are mounted to frame 67 and the shaft 69' is journaled in the blocks.
  • Locknuts S3' and 35' mounted on the shaft maintain the shaft in alignment, and can be adjusted as in the Aadjustment of locknuts 83 and 85 tof modify the amount of torque necessary to rotate plate 5 l lf the printing is 1being placed-on a form and the lines of printing are too low, for example, it is necessary to print earlier" with respect to the position of paper ll. This may be ac.- complished by reading the format tape 101 earlier", in other words, imparting a phase change between paper drive gear 29 and format drive gear 39.
  • l. ln a machine for advancing material through a work area and performing operations thereon under control of a format tape, the combination comprising:
  • first drive shaft for advancing said material, said first drive shaft being located in advance of said work area;
  • first and second pulleys mounted on said first and second drive shafts, said endless flexible drive means being looped around said pulleys for imparting rotation to said shafts, said pulleys dividing said endless flexible drive means into two sections;
  • guide means mounted on said plate for engaging said two sections, said guide means being responsive to said plate rotation for displacing the path of each of said two sections by substantially opposite deflections and varying the phase of one of said first and second drive shafts with respect to the other of said first and second drive shafts.
  • first and second pulleys mounted on said third drive shaft l and second drive shafts respectively, said endless flexible drive means being looped around said pulleys for imparting rotation to said shafts,4 said pulleys dividing said endless flexible drive into two sections; l

Landscapes

  • Advancing Webs (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Handling Of Sheets (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
US789341A 1969-01-06 1969-01-06 Paper tension and registration apparatus Expired - Lifetime US3570736A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78934169A 1969-01-06 1969-01-06

Publications (1)

Publication Number Publication Date
US3570736A true US3570736A (en) 1971-03-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
US789341A Expired - Lifetime US3570736A (en) 1969-01-06 1969-01-06 Paper tension and registration apparatus

Country Status (4)

Country Link
US (1) US3570736A (de)
DE (1) DE2000205A1 (de)
FR (1) FR2027826A1 (de)
GB (1) GB1270158A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3750919A (en) * 1971-12-20 1973-08-07 Burroughs Corp Format control tape cartridge and mounting assembly therefore
US3827616A (en) * 1972-03-14 1974-08-06 Int Computers Ltd Web feeding apparatus
US3944206A (en) * 1974-09-30 1976-03-16 Uarco Incorporated Deleaver for continuous business forms
US4115014A (en) * 1977-05-04 1978-09-19 Texas Instruments Incorporated Impact printer driveshaft gear and bearing assembly

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3154233A (en) * 1962-12-03 1964-10-27 Sperry Rand Corp Indexing mechanism for sheet feeding means
US3381867A (en) * 1965-10-14 1968-05-07 Mohawk Data Sciences Corp Paper feed drive system for high speed printers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3154233A (en) * 1962-12-03 1964-10-27 Sperry Rand Corp Indexing mechanism for sheet feeding means
US3381867A (en) * 1965-10-14 1968-05-07 Mohawk Data Sciences Corp Paper feed drive system for high speed printers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3750919A (en) * 1971-12-20 1973-08-07 Burroughs Corp Format control tape cartridge and mounting assembly therefore
US3827616A (en) * 1972-03-14 1974-08-06 Int Computers Ltd Web feeding apparatus
US3944206A (en) * 1974-09-30 1976-03-16 Uarco Incorporated Deleaver for continuous business forms
US4115014A (en) * 1977-05-04 1978-09-19 Texas Instruments Incorporated Impact printer driveshaft gear and bearing assembly

Also Published As

Publication number Publication date
DE2000205A1 (de) 1970-08-27
GB1270158A (en) 1972-04-12
FR2027826A1 (de) 1970-10-02

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AS Assignment

Owner name: BURROUGHS CORPORATION

Free format text: MERGER;ASSIGNORS:BURROUGHS CORPORATION A CORP OF MI (MERGED INTO);BURROUGHS DELAWARE INCORPORATEDA DE CORP. (CHANGED TO);REEL/FRAME:004312/0324

Effective date: 19840530