US3154235A - Registration mechanism for sheet feeding means - Google Patents

Registration mechanism for sheet feeding means Download PDF

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Publication number
US3154235A
US3154235A US241920A US24192062A US3154235A US 3154235 A US3154235 A US 3154235A US 241920 A US241920 A US 241920A US 24192062 A US24192062 A US 24192062A US 3154235 A US3154235 A US 3154235A
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US
United States
Prior art keywords
tractors
members
drum
shaft
sheet
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
US241920A
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English (en)
Inventor
David W Hubbard
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.)
Unisys Corp
Original Assignee
Sperry Rand 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
Priority to NL300946D priority Critical patent/NL300946A/xx
Application filed by Sperry Rand Corp filed Critical Sperry Rand Corp
Priority to US241920A priority patent/US3154235A/en
Priority to FR954545A priority patent/FR1377657A/fr
Priority to GB46157/63A priority patent/GB981856A/en
Priority to DE19631436717 priority patent/DE1436717C/de
Priority to CH1470563A priority patent/CH416686A/de
Application granted granted Critical
Publication of US3154235A publication Critical patent/US3154235A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
    • 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
    • B41J11/26—Pin feeds
    • B41J11/32—Adjustment of pin wheels or traction elements, e.g. laterally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41L—APPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING OR PRINTING FOR OFFICE OR OTHER COMMERCIAL PURPOSES; ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES
    • B41L1/00—Devices for performing operations in connection with manifolding by means of pressure-sensitive layers or intermediaries, e.g. carbons; Accessories for manifolding purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41L—APPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING OR PRINTING FOR OFFICE OR OTHER COMMERCIAL PURPOSES; ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES
    • B41L5/00—Autographic registers or like manifolding apparatus using movable strips or webs
    • B41L5/04—Autographic registers or like manifolding apparatus using movable strips or webs with mechanisms for feeding webs or for arranging web feed; with web storage arrangements
    • B41L5/06—Autographic registers or like manifolding apparatus using movable strips or webs with mechanisms for feeding webs or for arranging web feed; with web storage arrangements by means of rollers, wheels, or chains, e.g. with pins transversely
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/20—Advancing webs by web-penetrating means, e.g. pins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/12—Width

Definitions

  • This invention relates generally to sheet feeding mechanism and, more particularly, to means for adjusting the mechanism to accommodate sheets of different sizes and for varying the path of travel of a sheet relative to an operating station.
  • the invention is disclosed herein in an embodiment adapted for adjusting the position of the line spacing tractors employed in a high speed printer.
  • Machines of this class are ordinarily equipped with a plurality of tractors which are provided with sprocket pins adapted to engage with sprocket holes running along the marginal edges of the form to be fed.
  • the tractors are mounted for lateral adjustment. It has been found, particularly when the form being printed comprises several copies with interleaved carbon sheets or other transfer means between the copies, that correct registration of the form with the printing mechanism requires the provision of a pair of tractors on both sides of the print station, i.e. above and below the print station.
  • Each of the several tractors must be laterally adjustable, and the proper positioning of the several tractors has heretofore been found to be a time consuming operation since the adjustment must be precise to match exactly the width of the paper form being employed so as to achieve and maintain a predetermined amount of tension in the paper form.
  • the plurality of tractors must be positioned so as to hold the form in a precise registration with the printing means once their relative spacing has been determined.
  • the mechanism of the instant invention is designed to simplify the lateral adjustment of the several tractors for accommodating various width forms and also for properly registering the form relative to the print means.
  • a manually operated control member is provided for laterally adjusting simultaneously the tractors which engage one margin of the form
  • another manually operated member is provided for simultaneously adjusting the tractors engaging with the other margin of the form.
  • the adjusting means include a plurality of bands which are connected to respective tractors and are Wound or unwound in response to the manual actuation of said control members, said bands maintaining the plurality or set of tractors associated with one margin of the form in precise vertical alignment with each other at all times.
  • Means are provided for coupling the means for adjusting one set of said tractors with the means for adjusting the other set of said tractors whereby both sets of tractors are simultaneously positionable by a single adjustment procedure when it is desired to alter the registration of the form relative with the print wheels or drum.
  • This registration adjustment involving simultaneous shifting of both sets of tractors may moveover be accomplished while the machine is in operation and while the tractors are feeding paper line-by-line past the print station, thereby enabling the machine operator to visually observe results of the adjustment while the adjustment is being made.
  • lt is a further object of the invention to provide tractor adjustment means enabling the columnar registration of a sheet at a printing station concurrently with the line spacing operation of the tractor mechanism.
  • FIG. 1 is a View in front elevation of the paper feed mechanism associated with the print head assembly of a high speed printing machine.
  • FIG. 2 is an elevational View from the right-hand side of the mechanism shown in FIG. l.
  • FIG. 3 is a sectional detail view of the paper tractor control shaft shown in FIGS. l and 2, together with parts associated therewith.
  • FIG. 4 is a rear View of one of the paper tractor devices illustrating the means by which it is clamped to an associated adjusting band.
  • FlG. 5 is a diagram of the circuit employed for controlling the magnetic clutch associated with the tractor control shaft.
  • the mechanism can be seen to be supported between two upright side frame plates il, 12 of the machine between which extend an upper tractor support shaft 13 and a lower tractor support shaft i4, the ends of said shafts being suitably fastened to the side frame plates of the machine. Also extending between the side frame plates and suitably journaled therein is an upper tractor drive shaft 15 and a lower tractor drive shaft 16. Shafts l5 and i6 extend beyond the left frame M of the machine, and each carries a pulley 17, i8, respectively, around which is wound a belt 2@ by which the shafts are driven in unison by any suitable means, not shown.
  • the shafts 13, l5 support a pair of paper feeding tractors 25, 26 which are adapted to grip the side edges of a continuous sheet or form 27 of paper or the like and advance it upwards in line space increments past the printing station of the machine.
  • the printing station is considered to be that portion of the feed path lying between a type drum 28, see also FIG. 2, and a horizontally extending row of type hammers Sil supported in a print head assembly 3l and selectively actuated to impress the sheet material 27 along with an ink transfer medium, not shown, against type faces on the drum 28 to eifect a line of printing on the sheet or form in each print cycle.
  • the tractors 25, 26 may be of any suitable construction.
  • each tractor comprises a frame 35 of substantially elliptical outline supporting sprocket gear means keyed to the shaft 15 and driving a sprocket chain the links of which carry pins 38 adapted to engage in sprocket holes 4i) formed in the marginal side edges of the form sheet 27.
  • Each of the tractors is provided with a pivotal retainer il for holding the sheet in engagement with the sprocket pins 38 and which may be opened for removing the sheet from or inserting a new sheet in the machine.
  • Each tractor also includes a clamping lever 42 which secures the tractor irl an adjusted position and which may be operated to enable lateral adjustment of the tractors along the shafts 13, l5.
  • the lower shafts 14, 16 carry an identical pair of tractors 2S, 26 which are disposed along the shafts in precise vertical alignment with their counterpart tractors on the upper shafts and thereby serve as means for positively maintaining the sheets at the selected registration position relative to the printing station. It has been found that provision of only one pair of tractors beyond the printing station, such as tractors on the upper shafts 13, is unable to achieve precise registration of the form at the printing station, particularly in cases where the form consists of multi-parts .interleaved with carbon transfer sheets. The provision of a second pair oftractors behind the printing station, such as 4the tractors on the shafts 14, 15 enables precise registration of the form at the printing station and also enables the tension of the sheet to be maintained at a desired level at all times.
  • means are provided for avoiding the necessity of individually adjusting each of the four tractors when it is desired to feed a sheet or form of different width or to move a sheet into a different registration relative to the print station.
  • the means provided by the invention facilitate the setting of the tractors in adjusted position by mechanism operating to adjust both left-hand tractors simultaneously and both right-hand tractors 26 simultaneously,
  • the means for adjusting the several tractors includes a system of belts or bands 45, 46, 47, 43, preferably of steel or the like, of which there is one clamped to each of the tractor devices.
  • the ends of the several bands areV wrapped around and secured to manually rotatable drum means carried by shaft means mounted on the outer side of the right-hand machine frame plate 12.
  • angle brackets S1, 52 secured to the frame plate 12 support a substantially upright shaft 55 which is suitably journaled in said brackets and carries near its upper end a drum 56 and at its lower end a drum 57.
  • Carried by the shaft 55 between the drums 56, 57 is an independently rotatable hollow shaft or sleeve .6h to the upper end of which is fixed, adjacent drum 56, a drum 61 and to the lower end of which is xed, adjacent drumV 57, a drum 6.7.
  • Each of the drums 56, 57, 61, 62 is formed with a pair of circumferential grooves upon which are wound, in opposite directions, the opposite ends of a related one of the bands -48.
  • the band 45 is associated with the drum 56, one end of the band being wound about the lower groove in the drum, the band rurming oft' the front end of the drum and reaching through' an opening in the side frame 12 to a pulley 65 suitably mounted on the inner side of the frame plate 11, the belt returning to the rear side of the drum 56 and wrapped around the upper groove of the drum.
  • the belt 46 is associated with the drum 61 on the hollow shaft or sleeve 60, the belt similarly running from the front side of the upper groove of the drum, reaching around a pulley 66 and returning to the rear side of the lower groove of the drum.
  • Belt 47 is associated with the other drum 62 on the sleeve 60 and runs from the front side of the lower groove of the drum around a pulley 67 and returns to the rear side of the upperV groove of the drum.
  • Belt 48 is associated with the drum 57 mounted on the lower end of shaft ⁇ and runs from the front side of the upper groove of the drum, reaching around a pulley 68 and returning to the rear side of the lower groove of the associated drum.
  • Each of the bands is clamped to a respective one of the tractors 25, 26 by means which can best be seen in FIG. 4 which illustrates the clamping ofthe upper left tractor 25 to the band 45. PEG.
  • FIG. 4 is a view of the tractor from the rear wherein it can be seen that a clamping plate 71 is screwed onto the vregar face of the tractor frame 35.
  • the inner face of rthe .clamping plate is cut away to form a pair of parallel horizontally extending grooves for accommodating the forward reach of bands 45, 46.
  • the tractor housing or portion thereof underlying the sprocket pins is also cut away to define slots for accommodating the bands 45, 46
  • the lower tractors 25, 26 are similarly clamped selectively to the belts 47, 48, the tractor 25 being provided with a clamping plate for gripping the belt 48 and enabling free passage of the belt 47, the lower tractor 26 being provided with a similar clamping 'plate for gripping the belt 47 and enabling free passage of the belt 48.
  • each belt is provided with a tensioning device which is provided in the rear reach of the respective belt and comprises a coupling including a screw 74 threaded into clips 75 fastened to intermediate terminals of the band thus providing means whereby the tension of the respective bands can be readily and easily adjusted.
  • a tensioning device which is provided in the rear reach of the respective belt and comprises a coupling including a screw 74 threaded into clips 75 fastened to intermediate terminals of the band thus providing means whereby the tension of the respective bands can be readily and easily adjusted.
  • Rotation of the shaft 55 is accomplished through a beveled gear Si) fastened to the upper end of the shaft and .disposed in meshing engagement with a beveled pinion 81 mounted on the end of a shaft 82 rotatably supported in bracketsV S3 secured to the side frame plate 12 of the machine.
  • the front end of shaft 83 carries a manually rotatable knob S4 disposed at a conveniently accessible position for ⁇ manipulation by the operator of the machine.
  • Rotation of the sleeve 60, for adjustment of the righthand tractors 26, is effected in a similar manner by means of a beveled gear 9d mounted integrally with the drum 61 on 4the upper end of the sleeve, ⁇ the beveled gear being disposed in meshing engagement with a beveled pinion 91 mounted on the end of a shaft 92.
  • the shaft 92 is carried in brackets 93 fastened to the side frame plate 1.2 of the machine and carries at its forward end va manually rotatable knob 94 for manipulation by the operator to adjust the right-hand tractors 26.
  • control knobs S4, 94 are operated individually whenever it may be desired to alter the spacing between the left-hand tractors 25 and the right-hand tractors 26 so as to adjust the .mechanism for handling sheets or forms of different widths. In any adjusted position of the tractors, the Vsame vertical alignment will always be maintained since the tractors are operated positively through bands of non-yielding material thereby precluding any possibility Vof misalignment arising between the upper and lower tractors for a respective side of the sheet.
  • the invention includes means for operatively coupling the shaft 55 with the sleeve so that by a single adjustment procedure all four tractors, i.e. the two left-hand tractors 25 and the two right-hand tractors 26, may be shifted in unison in one direction or another ⁇ by the manipulation of one of the control knobs 84 or 94.
  • the invention includes means for operatively coupling the shaft 55 with the sleeve so that by a single adjustment procedure all four tractors, i.e. the two left-hand tractors 25 and the two right-hand tractors 26, may be shifted in unison in one direction or another ⁇ by the manipulation of one of the control knobs 84 or 94.
  • the drum 56 mounted on a shaft 55 is formed with an interior annular recess in which is wound a coil 95.
  • the drum 55 together with the adjacently disposed drum 6l on the sleeve dii are formed of magnetic material thus constituting a magnetic clutching device with the drum 55 serving as a magnetic core and the drum 61 serving as a clutch armature witmn the magnetic field of said core.
  • the coil 95' is connected to a suitable power source through a circuit which includes a manually operable switch 96.
  • the switch may be located at any suitable location on the machine and preferably is placed in close proximity to the control knobs 84, 94 so as to keep all of the manually operable controls over the tractor adjusting mechanism Within one easily accessible area.
  • irst adjusting means including a rst shaft memzber adapted to rotate about its axis, manually operable for shifting in unison the members of each pair engageable with one marginal area of said sheet material,
  • a second adjusting means including a second shaft member adapted to rotate about its axis, the axes of said first and second shaft members being co-linear, manually operable for shifting in unison the members of each pair engageable with the opposite marginal area of said sheet material, and
  • each adjusting means includes a band wound drum mounted on the associated shaft member, the drum mounted on one of the said shaft members ibeing formed of magnetic material and shaped to support a coil to constitute the core of said clutch, the drum mounted on the other of said shaft members Abeing formed of magnetic material and disposed adjacent to said core to constitute the armature of said clutch.
  • a sheet feeding mechanism for advancing sheet material past a work station having a first feed member engaging one edge of the sheet material before said work station, a second feed member engaging said one edge of the sheet material after said work station, a third feed member engaging the opposite edge of the sheet material before said work station, and a fourth -feed member engaging said opposite edge of the sheet material after said work station, a mechanism for selectively simultaneously adjusting said feed members or alternatively adjusting the width between feed members engaging opposite edges of the sheet material to accommodate different Widths of sheet material, the improvement comprising:
  • a first iiexible belt adapted to be affixed to said first feed member
  • a hollow shaft having a iirst drum adapted to engage said first belt
  • a second drum adapted to engage said second belt
  • gearing means coupling said first knob to said hollow shaft
  • gearing means coupling said second knob to said concentric shaft

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Advancing Webs (AREA)
  • Handling Of Sheets (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Registering Or Overturning Sheets (AREA)
US241920A 1962-12-03 1962-12-03 Registration mechanism for sheet feeding means Expired - Lifetime US3154235A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL300946D NL300946A (en, 2012) 1962-12-03
US241920A US3154235A (en) 1962-12-03 1962-12-03 Registration mechanism for sheet feeding means
FR954545A FR1377657A (fr) 1962-12-03 1963-11-21 Mécanisme d'alignement pour dispositif d'avancement de feuilles
GB46157/63A GB981856A (en) 1962-12-03 1963-11-22 Registration mechanism for sheet feeding means
DE19631436717 DE1436717C (de) 1962-12-03 1963-11-27 Vorrichtung zur Seitenver Stellung von in gegenüberliegende Rander einer Papierbahn eingreifen den Zufuhrgliedern
CH1470563A CH416686A (de) 1962-12-03 1963-12-02 Vorrichtung zum Zuführen von Papierbögen an eine Bearbeitungsstation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US241920A US3154235A (en) 1962-12-03 1962-12-03 Registration mechanism for sheet feeding means

Publications (1)

Publication Number Publication Date
US3154235A true US3154235A (en) 1964-10-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
US241920A Expired - Lifetime US3154235A (en) 1962-12-03 1962-12-03 Registration mechanism for sheet feeding means

Country Status (4)

Country Link
US (1) US3154235A (en, 2012)
CH (1) CH416686A (en, 2012)
GB (1) GB981856A (en, 2012)
NL (1) NL300946A (en, 2012)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3283875A (en) * 1964-05-21 1966-11-08 Moore Business Forms Inc Form feeding devices
US3288264A (en) * 1965-03-31 1966-11-29 Anelex Corp Printing machine with movable paperpositioning scale
US3292763A (en) * 1965-04-12 1966-12-20 Rca Corp Vertical measuring scale for high speed printers
US3334722A (en) * 1964-05-15 1967-08-08 Bull General Electric Device for advancing paper webs in printing mechanisms
US3420166A (en) * 1966-07-30 1969-01-07 Int Computers & Tabulators Ltd Paper carriage shifting means in high speed line printers
US3420352A (en) * 1965-10-21 1969-01-07 Honeywell Inc Document printer having rigidified frame carrying adjustablypositioned,document-advancing tractors
US3420164A (en) * 1964-12-23 1969-01-07 Int Computers Ltd Cyclically operable printing and proportional spacing apparatus
US3421612A (en) * 1965-08-30 1969-01-14 Sperry Rand Corp Lister attachment for high speed web printers
US3448906A (en) * 1965-12-07 1969-06-10 Int Computers & Tabulators Ltd Web positioning apparatus
US3578138A (en) * 1968-07-18 1971-05-11 Data Products Corp Paper adjusting mechanism
US3583539A (en) * 1968-06-17 1971-06-08 Ncr Co Forms feed locking device
US3596594A (en) * 1968-04-22 1971-08-03 Nippon Telegraph & Telephone High-speed printer employing plural print heads and paper feed expedients
US3987884A (en) * 1970-07-16 1976-10-26 Edward J. Buxton Printing apparatus with paper positioning tractor means and escapement means
FR2388348A1 (fr) * 1977-04-19 1978-11-17 Siemens Ag Dispositif de transport pour un support d'enregistrement a perforations marginales
US4269522A (en) * 1978-06-20 1981-05-26 Xerox Corporation Bi-directional record material feed apparatus
US4546908A (en) * 1980-05-27 1985-10-15 Dataproducts Corporation Horizontal paper form positioner and adjusting mechanism
US5354139A (en) * 1989-04-07 1994-10-11 Printronix, Inc. Paper feed system having mechanisms engaging opposite edges of print paper above and below print station of printer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4550623A (en) * 1983-10-24 1985-11-05 Hewlett Packard Company Motorized cable mechanism for positioning tractors in a printer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2919005A (en) * 1959-12-29 Printing apparatus
US3006520A (en) * 1959-09-21 1961-10-31 Anelex Corp Paper feed for high speed printers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2919005A (en) * 1959-12-29 Printing apparatus
US3006520A (en) * 1959-09-21 1961-10-31 Anelex Corp Paper feed for high speed printers

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3334722A (en) * 1964-05-15 1967-08-08 Bull General Electric Device for advancing paper webs in printing mechanisms
US3283875A (en) * 1964-05-21 1966-11-08 Moore Business Forms Inc Form feeding devices
US3420164A (en) * 1964-12-23 1969-01-07 Int Computers Ltd Cyclically operable printing and proportional spacing apparatus
US3288264A (en) * 1965-03-31 1966-11-29 Anelex Corp Printing machine with movable paperpositioning scale
US3292763A (en) * 1965-04-12 1966-12-20 Rca Corp Vertical measuring scale for high speed printers
US3421612A (en) * 1965-08-30 1969-01-14 Sperry Rand Corp Lister attachment for high speed web printers
US3420352A (en) * 1965-10-21 1969-01-07 Honeywell Inc Document printer having rigidified frame carrying adjustablypositioned,document-advancing tractors
US3448906A (en) * 1965-12-07 1969-06-10 Int Computers & Tabulators Ltd Web positioning apparatus
US3420166A (en) * 1966-07-30 1969-01-07 Int Computers & Tabulators Ltd Paper carriage shifting means in high speed line printers
US3596594A (en) * 1968-04-22 1971-08-03 Nippon Telegraph & Telephone High-speed printer employing plural print heads and paper feed expedients
US3583539A (en) * 1968-06-17 1971-06-08 Ncr Co Forms feed locking device
US3578138A (en) * 1968-07-18 1971-05-11 Data Products Corp Paper adjusting mechanism
US3987884A (en) * 1970-07-16 1976-10-26 Edward J. Buxton Printing apparatus with paper positioning tractor means and escapement means
FR2388348A1 (fr) * 1977-04-19 1978-11-17 Siemens Ag Dispositif de transport pour un support d'enregistrement a perforations marginales
US4269522A (en) * 1978-06-20 1981-05-26 Xerox Corporation Bi-directional record material feed apparatus
US4546908A (en) * 1980-05-27 1985-10-15 Dataproducts Corporation Horizontal paper form positioner and adjusting mechanism
US5354139A (en) * 1989-04-07 1994-10-11 Printronix, Inc. Paper feed system having mechanisms engaging opposite edges of print paper above and below print station of printer

Also Published As

Publication number Publication date
CH416686A (de) 1966-07-15
DE1436717A1 (de) 1968-11-14
DE1436717B2 (de) 1972-10-12
GB981856A (en) 1965-01-27
NL300946A (en, 2012)

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