US3057293A - Web feeding correction device - Google Patents

Web feeding correction device Download PDF

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Publication number
US3057293A
US3057293A US81747A US8174761A US3057293A US 3057293 A US3057293 A US 3057293A US 81747 A US81747 A US 81747A US 8174761 A US8174761 A US 8174761A US 3057293 A US3057293 A US 3057293A
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US
United States
Prior art keywords
ribbon
lever
home position
restoring
force
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
US81747A
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English (en)
Inventor
Rudolph L Zurowski
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
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International Business Machines Corp
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Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Priority to US81747A priority Critical patent/US3057293A/en
Priority to DEJ21143A priority patent/DE1222296B/de
Priority to GB927/62A priority patent/GB968370A/en
Application granted granted Critical
Publication of US3057293A publication Critical patent/US3057293A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B41J17/00—Mechanisms for manipulating page-width impression-transfer material, e.g. carbon paper
    • B41J17/28—Arrangements of guides for the impression-transfer material
    • 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
    • B65H23/032—Controlling transverse register of web
    • B65H23/038—Controlling transverse register of web by rollers

Definitions

  • This invention relates to feeding devices and particularly to a correction device for controlling the alignment of a moving web.
  • the present invention is particularly related to a means for correcting the alignment of an ink ribbon useful in a printer apparatus.
  • a print couple comprising an ink ribbon and a print medium strip are fed between a plurality of such type hammers and the type members.
  • the imprint in the print medium is obtained by striking the print medium and ribbon against the moving type members of the chain.
  • the type elements are moving along a horizontal print line while the print medium and ink ribbon are fed transversely to the direction of type motion, the print medium being fed preferably step by step and the ink ribbon being fed continuously.
  • the ribbon due to frequent contacts with the type members is subjected to a lateral drag force which causes misalignment.
  • misalignment left uncorrected eventually produces poor print quality and jamming of the ribbon feed device.
  • Previous correction devices and techniques for maintaining the alignment of the transversely fed ribbon have proved unsatisfactory. Wrinkling and creasing of the ribbon followed by cutting on impact with the embossed metal type characters resulting in defective printing and printer operation frequently resulted.
  • the correction device of the present invention comprises means for detecting the presence or absence of a moving web from a lateral home position, aligning means for applying a force restoring the web to the lateral home position in opposition to a lateral disaligning force, means for periodically initiating the operation of the detection and restoring means in timed relation with the advance of the web.
  • FIG. 1 is an isometric view of a printer apparatus showing a ribbon feed device incorporating the present invention.
  • FIG. 2 is an elevation view of a portion of FIG. 1 showing the ribbon feed and alignment device of the pres ent invention in one condition of operation.
  • FIG. 3 is the same as FIG. 2 showing a second condition of operation.
  • FIG. 4 is an end elevation of the correction device of the present invention as seen from the right of FIG. 2.
  • FIG. 5 is an elevated view of the ribbon detection mechanism of the correction device as shown in FIG. 2.
  • FIG. 6 is an elevated view of the ribbon restoring mechanism of the correction device as shown in FIG. 2.
  • FIG. 7 is a time chart showing the operation sequence of the detection and restoring mechanisms of the present invention.
  • a printer apparatus comprising an endless chain belt 10 carrying a plurality of equally spaced type members 11 thereon.
  • the chain belt 10 may be part of a cartridge assembly which includes spaced apart gear members 12, one of which may be driven by a suitable power mechanism (not shown) and chain guide plates 13.
  • a record strip 14 is adapted to pass from supply roll 15 over strip guide members 16 and 17 and to be advanced step by step by conventional means including sprocket wheels 18 connected to drive pulley 19.
  • Printing of characters represented by the type members '11 on record strip 14 is accomplished by a plurality of type hammers 20 equally spaced at a plurality of print positions along a print line parallel to the path of travel of the chain belt 10.
  • the operation of the hammers 20 is preferably under control of a system adapted to identify the various type members 11 as they appear at predetermined print positions and a storage device which identifies the character to be printed at the corresponding print posi-' tridge plate 13 forward and rearward guide plates 24 and 25 to winding roll 26.
  • the feeding of the ribbon 21 is effected by a constant speed electric motor 27 connected by shaft 28 to a reduction gear 29 through gears 30 and 31 connecting reduction gear 29 to ribbon roll drive gears 32 and 33 on shafts 34 and 35 respectively.
  • the feeding of ribbon 21 is continuous.
  • the ribbon 21 also moves past the print line transverse to the direction of movement of the chain belt 10.
  • the type chain is continuously moving and printing occurs on-the-fly, i.e., the type hammers 20 strike the strip 14 (Which is stationary during printing) and moving ribbon 21 against the moving type 11.
  • the ribbon 21 contacts the moving type members 11, an instantaneous force is applied to the ribbon 21 causing it to advance laterally.
  • the net effect is to apply a substantially continuous lateral or drag force to the ribbon 21 tending to displace it laterally.
  • the restoring mechanism comprises a lever 40 mounted on a stationary pivot 41 and carrying at its upper end a friction restoring roll 42.
  • Friction roll 42 is mounted by shaft 43 to a bracket 44 which is attached to the upper end of lever 40 by such means as a bolt 45 or the like.
  • the shaft 43 of friction roll 42 is skewed relative to the direction of travel of ribbon 21.
  • Guide plate 25 under the ribbon 21 serves to back up the friction roll 42 when lever 40 is rotated counterclockwise about its pivot 41.
  • a spring 46 is anchored at one end to a frame 47 and is connected at the other end by pin 48 to the lower arm of lever 40 and operates to bias lever 40 toward contact with the ribbon 21 on guide plate 25.
  • the lower end of restore lever 40 is provided with a curved edge 49 adapted to be cam operated to rotate lever 40 around pivot 41 against the bias of spring 46.
  • restore lever 40 is bent to provide a stop or lock edge 50.
  • the friction roll 42 may be provided with a ratchet 51, and a pawl 52 mounted on bracket 44 is cooperable with ratchet 51 to prevent the reverse rotation of roll 42 when the direction of motion of the ribbon 21 is reversed should such be desired.
  • the means for detecting the displacement of the ribbon 21 from the lateral home position comprises a detection lever 54 supported at one end by stationary pivot 55 and carrying at its other end a detection element 56 freely rotatable about a horizontal shaft 57.
  • the detection lever 54 is provided intermediate its ends with a downwardly extending arm 58 having a curved camming edge 59 adapted when engaged to effect the rotation of the detection lever 54 clockwise around pivot 55.
  • the upper end of detection lever 54 is preferably contoured so as to have its counterclockwise rotation limited by pivot 41 of restore lever 40.
  • a pawl 60 is mounted to fixed pivot 61, which is suitably anchored to frame 47.
  • a leaf spring 62 connected to the pawl 60 by screw 63 extends ovei the upper end of the pawl and beyond its left end.
  • a detent 64 in the lower left end of pawl 60 is provided for engaging the stop section 50 of restore lever 40.
  • a pin 65 attached to the inner surface of detection lever 54 extends outwardly to be engageable when rotated clockwise with the under side of leaf spring 62.
  • the operation of the detection and restoring mechanisms is performed in timed relation with the feeding of 4 ribbon 21.
  • a cam roll 70 is mounted on the face of reduction gear 29. As reduction gear 29 rotates counterclockwise, roller 21) is brought successively into contact with cam surface 59 of detection lever 54 and cam surface 49 of restore lever 40.
  • roller 70 comes into contact with surface 49 of restore lever 40.
  • friction roll 42 is in contact with the upper surface of ribbon 21 and is applying a restoring force toward the lateral home position.
  • the continued rotation of gear 29 causes roller 70 to move across surface 49 of restore lever 40 causing it to rotate clockwise around pivot 41 against the action of spring 46 lifting roller 42 out of contact with the ribbon 21.
  • roller 711 moves the locking edge 50 of lever 40 to the left a sufficient degree to permit the pawl 65 to move counterclockwise around pivot 61.
  • the pawl 60 is not free to rotate clockwise with the spring 62 around pivot 61 since notch 64 is in contact with surface 50 of restore lever 40 which is biased by spring 46.
  • roller 70 moves under camming surface 59 of lever 54, it permits the lever 54 to rotate counterclockwise until sense element 56 comes to rest on the upper surface of guide member 25. Since ribbon 21 is not in its lateral home position, sense element 56 will retain the lever 54 in a higher position indicated by section 83 in curve I.
  • the detection lever 54 is in position calling for the application of a restoring force by the friction roll 42. However, such application must await the rotation of cam roller 70 through approximately 120 where it comes into contact with cam surface 49 of lever 40.
  • restore lever 40 is first rotated clockwise about pivot 41 against the bias of spring 46.
  • pawl 60 is released from contact with locking surface 50, consequently, pawl 60 will turn clockwise about pivot 61 to follow its leaf spring 62 which has been previously deflected by pin 65 of lever 54.
  • roller 70 moving beyond the point of contact with surface 49 of lever 40 causes the restore lever 40 to rotate counterclockwise around pivot 41.
  • the friction roll 42 is thus lowered into contact with the upper surface of ribbon 21 and operates to convert the translational force applied to the ribbon to a lateral displacement force which restores the ribbon to the lateral home position.
  • This operation is indicated in section 86 of curve II, FIG. 7.
  • the first described operation is repeated if the ribbon 21 has been fully restored to its lateral home position.
  • means for correcting for the disalignment of said ribbon comprising a means operable for detecting the presence or absence of said moving ribbon element from a home position, means operable for restoring said ribbon to said home position in accordance with an absence indication from said detection means, and means for periodically initiating the operation of said detection and restoring means in timed relation to the advance of said ribbon element.
  • means for correcting for the disalignment of said ribbon element comprising means operable for detecting the presence or absence of said moving ribbon element from a lateral home position, means operable for restoring said ribbon to said home position in opposition to said disalignment force, means for periodically initiating the operation of.
  • said detecting and restoring means in timed relation with the advance of said ribbon element, and means responsive to said detecting means for enabling or disabling the operation of said restoring means in accord ance with an absence or presence indication by said detecting means.
  • means for correcting for the disalignment of said ribbon element comprising detection means operable for detecting the presence or absence of said ribbon from a lateral home position including a detection lever and a sense element carried thereby, said detection lever being positionable to place said sense element at said lateral home position, means for applying a restoring force in opposition to said disalignment force including a restore lever and a roller carried thereby, said lever being movable for placing said roller into Opposition force applying contact with said ribbon, means for periodically opera-ting said detection lever and said restore lever in succession in timed relation with the advance of said ribbon for successively placing said sense element in said home position and for positioning said restore lever in preparation for the application of said roller to said ribbon, and means controlled by said detection means for enabling and disabling said restore means including
  • means for correcting for the disalignment of said ribbon comprising detection means operable for determining the absence or presence of said ribbon from a lateral home position including a detection lever movable to first and second positions and a sense element carried thereby, said sense element being deflectable by said moving ribbon to control the movement of said detection lever from said first to said second control positions, means for restoring said ribbon to said home position including a lever movable so as to assume first and second restoring positions and a restore force applicator carried thereby, means for periodically initiating the movement of said detection lever and said restore lever in timed relation with the advance of said ribbon whereby said sense element is placed at said home position and said restore lever is prepared for placing of said roller on said ribbon, and means controlled by said detection lever for enabling and disabling the operation of
  • a printer apparatus having a printing mechanism including type elements movable at a continuous rate of speed along a print line, hammer elements arranged along said print line and being operable for striking said moving type elements, and a ribbon element movable transverse to the direction of motion of said type elements and adapted to be moved by said hammer elements into repetitive contact with said type elements
  • the combination comprising means for advancing said ribbon element in a direction transverse to said print line at a continuous rate of travel, and means operable periodically by said ribbon advancing means in timed relation with the advance of said ribbon element for correcting for the disalignment of said ribbon from a lateral home position.
  • a printer apparatus having a printing mechanism including type elements movable along a print line, hammer elements arranged along said print line and being operable for striking said moving type elements, and a ribbon element movable transverse to the direction of motion of said type elements and adapted to be repetitively brought into frictional contact With said type elements by said hammer elements, the combination comprising means for advancing said ribbon element transverse to the direction of motion of said type elements, means for detecting the presence or absence of said ribbon element from a home position, and means for restoring said ribbon to said home position in opposition to disalignment caused by contact of said ribbon and said moving type elements, said detection means and restoring means being operable by said ribbon advancing means in timed relation with the advance of said ribbon.
  • said restoring means includes a means for converting the force for advancing said ribbon past said print line into a restoring force transverse to the direction of advance of said ribbon.
  • said force conversion means includes a roller means frictionally engaging a surface of said ribbon element at a point beyond said contact with said type element, said roller means having an axis of rotation displaced at an angle to a line transverse to the direction of travel of said ribbon.
  • an apparatus having a ribbon element or the like comprising means for advancing said ribbon at a continuous rate of travel in a first direction past a Work station, said ribbon element being subjectable at said work station to a disaligning force transverse to said direction of travel, means operable for detecting the presence or absence of said advancing ribbon element from a lateral home position, means operable for restoring said ribbon to said home position in accordance with an absence indication from said detecting means, and means operable by said ribbon advancing means for periodically initiating the operation of said detection and restoring means in timed relation with the advance of said ribbon element.
  • said means for pe riodically initiating the movement of said detection lever and said restore lever in timed relation With the advance of said ribbon includes means operable by said ribbon moving means.
  • said means operable by said ribbon moving means includes a cam member adapted to actuate said detection lever and said restore lever in succession and in timed relation with the advance of said ribbon.

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  • Impression-Transfer Materials And Handling Thereof (AREA)
US81747A 1961-01-10 1961-01-10 Web feeding correction device Expired - Lifetime US3057293A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US81747A US3057293A (en) 1961-01-10 1961-01-10 Web feeding correction device
DEJ21143A DE1222296B (de) 1961-01-10 1962-01-09 Farbbandtransporteinrichtung fuer Druckwerke von Daten verarbeitenden Maschinen
GB927/62A GB968370A (en) 1961-01-10 1962-01-10 Improvements in and relating to web feeding devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US81747A US3057293A (en) 1961-01-10 1961-01-10 Web feeding correction device

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Publication Number Publication Date
US3057293A true US3057293A (en) 1962-10-09

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US81747A Expired - Lifetime US3057293A (en) 1961-01-10 1961-01-10 Web feeding correction device

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US (1) US3057293A (de)
DE (1) DE1222296B (de)
GB (1) GB968370A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3331317A (en) * 1964-05-19 1967-07-18 Sperry Rand Corp High speed bar printer
US3371916A (en) * 1965-09-03 1968-03-05 Ncr Co Automatic tracking control apparatus for maintaining alignment of a moving web
US3701318A (en) * 1970-04-15 1972-10-31 Mohawk Data Sciences Corp Skew control apparatus for feeding a wide-web ribbon in a high speed printer
US4003460A (en) * 1974-06-21 1977-01-18 Honeywell Information Systems, Inc. Type ribbon deskewing means for a type ribbon feed apparatus
US4173929A (en) * 1977-11-29 1979-11-13 Documation Incorporated Printer ribbon anti-fold mechanism
CN104229526A (zh) * 2014-09-03 2014-12-24 无锡市张泾宇钢机械厂 薄膜输送纠偏调整感应装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US642141A (en) * 1899-04-05 1900-01-30 Fred Lyon Web shifter and regulator.
US1769687A (en) * 1928-11-10 1930-07-01 Hamilton John Herbert Guiding apparatus for webs
US1995462A (en) * 1932-07-19 1935-03-26 C G Haubold Ag Strip guider
US2297858A (en) * 1941-07-24 1942-10-06 Botany Worsted Mills Fabric centering device
US2485254A (en) * 1947-04-30 1949-10-18 Addressograph Multigraph Carbon ribbon feed attachment

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH331874A (de) * 1955-01-13 1958-08-15 Robertson John Douglas Führungsvorrichtung für fortlaufende Bahnen
DE1079869B (de) * 1958-08-23 1960-04-14 Anker Werke Ag Farbbandfuehrung fuer rechnende Buchungsmaschinen, Registrierkassen u. dgl.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US642141A (en) * 1899-04-05 1900-01-30 Fred Lyon Web shifter and regulator.
US1769687A (en) * 1928-11-10 1930-07-01 Hamilton John Herbert Guiding apparatus for webs
US1995462A (en) * 1932-07-19 1935-03-26 C G Haubold Ag Strip guider
US2297858A (en) * 1941-07-24 1942-10-06 Botany Worsted Mills Fabric centering device
US2485254A (en) * 1947-04-30 1949-10-18 Addressograph Multigraph Carbon ribbon feed attachment

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3331317A (en) * 1964-05-19 1967-07-18 Sperry Rand Corp High speed bar printer
US3371916A (en) * 1965-09-03 1968-03-05 Ncr Co Automatic tracking control apparatus for maintaining alignment of a moving web
US3701318A (en) * 1970-04-15 1972-10-31 Mohawk Data Sciences Corp Skew control apparatus for feeding a wide-web ribbon in a high speed printer
US4003460A (en) * 1974-06-21 1977-01-18 Honeywell Information Systems, Inc. Type ribbon deskewing means for a type ribbon feed apparatus
US4173929A (en) * 1977-11-29 1979-11-13 Documation Incorporated Printer ribbon anti-fold mechanism
CN104229526A (zh) * 2014-09-03 2014-12-24 无锡市张泾宇钢机械厂 薄膜输送纠偏调整感应装置

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Publication number Publication date
DE1222296B (de) 1966-08-04
GB968370A (en) 1964-09-02

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