US3838804A - Non-shingling forms feed tractor - Google Patents

Non-shingling forms feed tractor Download PDF

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Publication number
US3838804A
US3838804A US00359044A US35904473A US3838804A US 3838804 A US3838804 A US 3838804A US 00359044 A US00359044 A US 00359044A US 35904473 A US35904473 A US 35904473A US 3838804 A US3838804 A US 3838804A
Authority
US
United States
Prior art keywords
tractor
sprocket
forms
feeding device
pin 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
US00359044A
Other languages
English (en)
Inventor
E Bonafino
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
Priority to US00359044A priority Critical patent/US3838804A/en
Priority to GB1469874A priority patent/GB1448056A/en
Priority to JP4006474A priority patent/JPS553260B2/ja
Priority to FR7413424A priority patent/FR2228621B1/fr
Priority to DE2421922A priority patent/DE2421922A1/de
Application granted granted Critical
Publication of US3838804A publication Critical patent/US3838804A/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
    • B65H20/00—Advancing webs
    • B65H20/20—Advancing webs by web-penetrating means, e.g. pins
    • 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
    • B41J11/28—Pin wheels
    • 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
    • B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
    • B41J15/18—Multiple web-feeding apparatus
    • B41J15/24—Multiple web-feeding apparatus with means for registering the webs with each other

Definitions

  • the sprocket pin type forms feeding device for multi-layered paper strips comprises a pair of sprocket wheels mounted on a rotatably driven shaft, with the sprocket wheels including a tractor drum portion having a base diameter and a tractor tire element securely attached to the tractor drum for increasing the base diameter so as to functionally overdrive the last or bottom-most copy of the multi-layered forms at the same rate of speed as the first copy and to thereby prevent shingling of the paper layers of the multilayered forms.
  • This invention relates to the improvements in sprocket pin strip forms feeding devices, and particularly, to the feeding of forms having multi-layered copies wherein the driving tractor drum includes means for driving the last copy of the multi-layered form at the same rate of speed as the first copy to prevent shingling of the forms.
  • the invention relates to improvements in forms feeding device for printers of the type disclosed in the U.S. Pat. No. 3,747,820 issued to .l. E. Hawxhurst and assigned to the assignee of the present invention.
  • the roller and sprocket have reduced diameter sprocket sections over which is fitted an endless cog belt which forms the driving means for driving the roller at the same angular speed as the sprocket is driven.
  • the roller has two relatively soft sleeves of rubber to frictionally drive the paper strip.
  • the outer diameters of the roller sleeves are slightly larger than the diameters of the sprocket section about which the paper strip is wrapped. Since the roller is intermediate of the drive sprocket and the source of frictional drag, the roller will tend to frictionally drive the paper ahead of the sprocket. Therefore, no load will be applied to the sprocket pins at this time.
  • Such a paper drive mechanism is satisfactory in certain paper feeding applications, but involves excessive equipment including the intermediate roller apparatus which utilizes more space and increases the cost of the mechanism. Further, experimentation with such an apparatus has caused a cyclical bunching of the forms in the printing area.
  • the present invention is based on applicants discovcry that by utilizing a tractor roller having an increased radius in frictional engagement with the paper being driven by .the feed sprocket that this arrangement can functionally operate to overcome the undesired shingling characteristics generally present when feeding multi-layered paper forms.
  • Another object of this invention is to provide a forms feeding apparatus which can accommodate a wide range of multi-layered paper forms.
  • the reference numeral 10 denotes generally one of two forms feeding devices used for feeding continuous forms or document 12 past a print line defined by a type character 14 representing a chain or train of characters, which move along a print line perpendicular to the surface of the drawing past a plurality of print hammers represented by the hammer 116 comprising an armature pivotally supported at 18 to be actuated by means of a solenoid 20 for impacting the document 12 against the type characters 14 for printing on the document.
  • the forms feeding device 10 may comprise a pair of sprocket wheels 22 (FIG. 3) positioned in spaced apart relation for feeding the continuous forms 12.
  • the sprocket wheel 22 is mounted on a support shaft 24, which spans between two end plates (not shown).
  • the sprocket wheel 22 is provided with a plurality of sprocket pins 28 about its periphery for engaging holes 13 in the continuous forms 12.
  • the sprocket wheel 22 i has a tractor drum surface 30 adjacent the sprocket wheel 22.
  • the sprocket wheel 22 is mounted on a shaft 24 by being secured to a relatively flat carrier plate 34 t
  • F 2 l i is the force differential about the tractor
  • e equals 2.718
  • the base of Napierian or hyperbolic logarithms, y. equals the coefficient of friction between the tractor and the paper; and (1 equals the included angle in radians by which the paper wraps around the drum.
  • the increasing of the radius R at a point on the tractor drum 30 such that the frictional drive force derived from the drums 30 to the last copy of the multi-layer form compensates for the drag in the paper feed path on the last copy and drives the last copy at least the same distance as the copies being driven only by the sprocket pins 28 of the tractor drum assembly.
  • the base diameter herein referred to is the diameter of the sprocket wheel 22.
  • the tractor drum has the same base diameter as the sprocket wheel 22.
  • the base diameter of the tractor drum 30 is-increased in the order of from 0.015 to 0.070 inch by the addition of a tractor tire element 40 securely attached to or snapped on the tractor drum 30.
  • the tractor tire element 40 is fabricated of a material having a high coefficient of friction characteristic. In a preferred embodiment of the apparatus the tractor tire element 40 was fabricated of urethane material.
  • the tractor tire element 40 can be added to the tractor drum 30 by coating the drum in that area or by snapping a tire of the appropriate material onto the drum or securing it thereto.
  • a sprocket pin type forms feeding device for continuously advancing multi-layered paper strips comprising:
  • sprocket wheels each having sprocket pins engageable in perforations along the edges of the multi-layered paper strips for advancing same and concentrically mounted and secured on said continuously and rotatably driven shaft, said sprocket wheels including a tractor drum portion having a base diameter; and a tractor tire element securely attached to the tractor drum portion immediately adjacent to each of said sprocket wheels for increasing the diameter of the tractor drum portion and functioning to frictionally engage and overdrive the last copy of the multi-layered forms at the same rate of speed as the first copy and thereby prevent shingling of the paper layers of the forms.
  • a sprocket pin type forms feeding device as defined in claim 1 wherein the tractor tire element is fabricated of a material having a high coefficient of friction characteristic.
  • a sprocket pin type forms feeding device as defined in claim 1 wherein the tractor tire element is fabricated of urethane material.
  • a sprocket pin type forms feeding device as defined in claim 2 wherein the tractor tire element increases the base diameter of the tractor portion in the range of 0.015 inches to 0.070 inches.

Landscapes

  • Advancing Webs (AREA)
  • Handling Of Sheets (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)
US00359044A 1973-05-10 1973-05-10 Non-shingling forms feed tractor Expired - Lifetime US3838804A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US00359044A US3838804A (en) 1973-05-10 1973-05-10 Non-shingling forms feed tractor
GB1469874A GB1448056A (en) 1973-05-10 1974-04-03 Forms feed tractor
JP4006474A JPS553260B2 (enrdf_load_stackoverflow) 1973-05-10 1974-04-10
FR7413424A FR2228621B1 (enrdf_load_stackoverflow) 1973-05-10 1974-04-10
DE2421922A DE2421922A1 (de) 1973-05-10 1974-05-07 Stachelrad-transportvorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00359044A US3838804A (en) 1973-05-10 1973-05-10 Non-shingling forms feed tractor

Publications (1)

Publication Number Publication Date
US3838804A true US3838804A (en) 1974-10-01

Family

ID=23412075

Family Applications (1)

Application Number Title Priority Date Filing Date
US00359044A Expired - Lifetime US3838804A (en) 1973-05-10 1973-05-10 Non-shingling forms feed tractor

Country Status (5)

Country Link
US (1) US3838804A (enrdf_load_stackoverflow)
JP (1) JPS553260B2 (enrdf_load_stackoverflow)
DE (1) DE2421922A1 (enrdf_load_stackoverflow)
FR (1) FR2228621B1 (enrdf_load_stackoverflow)
GB (1) GB1448056A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4394949A (en) * 1980-04-15 1983-07-26 Epson Corporation Pin wheel feed mechanism
EP0163160A1 (en) * 1984-05-02 1985-12-04 Oki Electric Industry Company, Limited Paper tractor

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2908946C2 (de) * 1978-03-08 1984-10-25 Canon K.K., Tokio/Tokyo Wärmedrucker mit einem Heizelemente aufweisenden Wärmedruckkopf
JPS55144050U (enrdf_load_stackoverflow) * 1979-03-31 1980-10-16
IT1135127B (it) * 1981-01-22 1986-08-20 Honeywell Inf Systems Meccanismo di trasporto carta per stampante
SE440766B (sv) * 1981-10-09 1985-08-19 Facit Ab Pappersmatningsanordning
DE3933030A1 (de) * 1989-09-29 1991-04-11 Mannesmann Ag Vorrichtung fuer randgelochte papierbahnen in druckern, insbesondere in matrixdruckern

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3028063A (en) * 1959-01-26 1962-04-03 Clary Corp Paper feeding apparatus
US3058638A (en) * 1960-08-29 1962-10-16 Clary Corp Paper feeding apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3028063A (en) * 1959-01-26 1962-04-03 Clary Corp Paper feeding apparatus
US3058638A (en) * 1960-08-29 1962-10-16 Clary Corp Paper feeding apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4394949A (en) * 1980-04-15 1983-07-26 Epson Corporation Pin wheel feed mechanism
EP0163160A1 (en) * 1984-05-02 1985-12-04 Oki Electric Industry Company, Limited Paper tractor
US4619389A (en) * 1984-05-02 1986-10-28 Oki Electric Industry Co., Ltd. Paper tractor

Also Published As

Publication number Publication date
GB1448056A (en) 1976-09-02
FR2228621B1 (enrdf_load_stackoverflow) 1976-12-17
DE2421922A1 (de) 1974-11-21
JPS5011043A (enrdf_load_stackoverflow) 1975-02-04
FR2228621A1 (enrdf_load_stackoverflow) 1974-12-06
JPS553260B2 (enrdf_load_stackoverflow) 1980-01-24

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