US3870214A - Web tensioning device - Google Patents

Web tensioning device Download PDF

Info

Publication number
US3870214A
US3870214A US446012A US44601274A US3870214A US 3870214 A US3870214 A US 3870214A US 446012 A US446012 A US 446012A US 44601274 A US44601274 A US 44601274A US 3870214 A US3870214 A US 3870214A
Authority
US
United States
Prior art keywords
web
lever
bearing
roll
measuring
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
US446012A
Other languages
English (en)
Inventor
Jurg Friedrich Schmid
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.)
Wifag Maschinenfabrik AG
Original Assignee
Wifag Maschinenfabrik AG
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 Wifag Maschinenfabrik AG filed Critical Wifag Maschinenfabrik AG
Application granted granted Critical
Publication of US3870214A publication Critical patent/US3870214A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web

Definitions

  • the present invention is directed to a web tensioning device and, more particularly, it concerns a device for checking the web tension and maintaining it at a constant value.
  • Such a device involves a costly arrangement of driving and feeding rolls as well as a complicated arrangement for measuring the web tension and eliminating any deviations from the nominal value.
  • a disadvantage of this device is that it is not possible to obtain a variation which is greater or smaller than the processing speed.
  • the primary object'of the present invention is to provide a simple and safe device requiring little maintenance which regulates the web tension at a constant value.
  • a pair of rolls are provided which are driven at a constant speed with at least one of the rolls having an elastic surface, and the rolls feed a varying amount of material depending on the pressure applied in the roll gap or bite.
  • the web tensioning device acts as a friction-free variable web drive, due to the special feeding properties of the pair of rolls used, with at least one of the rolls having an elastic surface coat.
  • the conveying speed of the feed rolls can be higher or lower than the processing speed, depending on the size of the adjustable force exerted on the rolls.
  • one of the feed rolls is fixedly mounted in a bearing and is driven so that its surface feed corresponds substantially to the processing speed of the web.
  • the other feed roll is adjustably mounted on a lever which is pivotally mounted in a fixed bearing at one end while its other end is articulated to the piston rod of a piston assembly secured to another fixed bearing.
  • a measuring and storage roll is provided for guiding the web.
  • the measuring and storage roll' is rotatably mounted on another level which is pivotally supported intermediate its ends on a bearing.
  • An adjustable force source is positioned on the lever on the opposite side of the bearing from the roll for establishing the constant value of the web tension.
  • Reversing elements are arranged in the path of the pivotal movement of the lever for sensing the variation of the conveying speed relative to the processing speed and, depending on the manner in which web speed varies, conveying the signal to one of a pair of valves connected over an OR-gate to the piston assembly for adjusting the contacting relationship betweed the feed rolls.
  • a web B of paper or the like passes between a pair of feed rolls 1, 3.
  • One of the feed rolls 1 is fixedly mounted in a fixed bearing which is driven so that its surface speed corresponds substantially to the processing speed Vt of the material web B.
  • the other one of the feed rolls is adjustably mounted on a lever 4, intermediate the ends of the lever.
  • One end of the lever is pivotally mounted in a fixed bearing while the other end is articulated to a piston rod 6 extending outwardly from a piston assembly 8 which is supported on a fixed bearing 7.
  • the measuring and storage roll 10 is rotatably mounted on one end of a lever 11 which is pivotally mounted intermediate its ends on a fixed bearing 12.
  • An adjustable source of force 13 is positioned on the lever 11 on the opposite side of the bearing 12 from the roll 10 and the source of force positions the lever in accordance with the constant web tension.
  • a reversing element 14 is provided with a slot or opening through which the lever 11 passes between the roll 10 and the bearing 12.
  • a pair of valves 15, 16 are associated with the reversing member 14 each located on an opposite side of the reversing member relative to the lever. The two valves 15, 16 are connected to the piston assembly 8 over an OR-gate 17.
  • the source of force 13 associated with the lever 11 can be in the form of a displaceable counterweight or a pneumatic piston.
  • the reversing member 14 forms a guide through which the lever passes so that any tendency of the web tension to depart from its constant value will cause the lever to pivot about its point of articulation on the bearing 12 so that the rods extending between the reversing member and the valves can actuate one of the valves.
  • pneumatic units can be used.
  • valve 15 As the web B passes over the measuring and storage roll 10 one of the valves 15, 16 is connected to the pis ton 8 while the other remains disconnected. If valve 15 is connected, the pressure P1, conveyed through the valve, acts in the piston 8 and adjusts the contact between the feed rolls 1, 3. The pressure Pl, conveyed through the valve 15 is connected so that the conveying speed Vt of the feed rolls 1, 3 is somewhat less than the processing speed Vv. As a result, with valve 15 connected to the piston assembly 8, the moving and storage roll, as viewed in the drawings, moves downwardly along with the lever 11 until the valve 16 is connected through the reversing member 14 and, at the same time, the valve 15 is disconnected. The pressure P2 is adjusted, as compared to the pressure Pl, so that the speed Vt is somewhat higher than the processing speed Vv and the roll then reverses direction and moves upwardly until valve is again connected and valve 16 is disconnected.
  • Web tensioning device for regulating the tension of a web of material, such as a web of paper, to a constant value, characterized in that a pair of feed rolls are disposed in contacting relationship and arranged to provide a bite through which the web can be passed, a first bearing mounted in a fixed position, one of said feed rolls fixed in said first bearing and arranged to be driven so that its surface speed corresponds substantially to the processing speed of the material web, a second bearing mounted in a fixed position, a first lever pivotally mounted on said second bearing, the other said feed roll being mounted on said first lever, a third bearing mounted in a fixed position, a piston assembly including a piston rod secured to said third bearing with said piston rod connected to said lever, a guide roll spaced from the pair of said feed rolls and arranged for the web of material to pass over said guide roll after passing through the bite formed by said feed rolls, a measuring and storage roll spaced downstream of said guide roll in the direction of movement of the web of material so that the web passes over it, a fourth bearing mounted in a fixed
  • said regulating means includes a reversing member mounted on said second lever for sensing the movement of said lever about its point of pivotal connection to said second bearing, an OR-gate connected to said piston assembly, a first valve connected to said reversing member and to said OR-gate, a second valve connected to said reversing member and to said OR- gate, each of said first and second valves connected to a source of pressure at a different value, so that as the web moves over said measuring and storage roll one of said valves is connected to said piston while the other valve is disconnected causing said measuring and storage roll to reverse its direction of movement for connecting the disconnected valve and disconnecting the other valve for maintaining the constant web tension value.
  • Web tensioning device as set forth in claim 2, wherein said reversing member comprises a guide member having a slot through which said lever extends and relative to which said lever is displaceable in accordance with the web tension exerted on the measuring and storage roll, a pair of rods secured to said guide member each on an opposite side of said lever in the direction in which the lever is pivotally displaceable, each of said rods connected to a different one of said valves for alternately operating said valves in accordance with the movement of said measuring and storage roll mounted on said second lever.
  • a web tensioning device as set forth in claim 1, wherein said adjustable member is a displaceable counterweight mounted on said second lever.
  • Web tensioning device as set forth in claim 1, wherein said adjustable member is a pneumatic piston connected to said second lever.

Landscapes

  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Replacement Of Web Rolls (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Treatment Of Fiber Materials (AREA)
US446012A 1973-02-27 1974-02-26 Web tensioning device Expired - Lifetime US3870214A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7302756A SE382614B (sv) 1973-02-27 1973-02-27 Banspenningsanordning

Publications (1)

Publication Number Publication Date
US3870214A true US3870214A (en) 1975-03-11

Family

ID=20316753

Family Applications (1)

Application Number Title Priority Date Filing Date
US446012A Expired - Lifetime US3870214A (en) 1973-02-27 1974-02-26 Web tensioning device

Country Status (8)

Country Link
US (1) US3870214A (en))
JP (1) JPS5048387A (en))
CH (1) CH562158A5 (en))
DE (1) DE2406581C2 (en))
FR (1) FR2219097B1 (en))
GB (1) GB1431241A (en))
IT (1) IT1008305B (en))
SE (1) SE382614B (en))

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981000395A1 (fr) * 1979-08-10 1981-02-19 V Mulyar Dispositif de mesure de commande du rapport d'extensibilite elastique d'une toile de lin mobile
US4549701A (en) * 1983-12-16 1985-10-29 Beloit Corporation Web tension load cell
US4609336A (en) * 1984-10-17 1986-09-02 Gencorp Inc. Apparatus and method for extrusion
US5255836A (en) * 1988-07-27 1993-10-26 The Perkin-Elmer Corporation Flame spray gun with wire feed control
WO1996004100A1 (en) * 1994-08-04 1996-02-15 Lawson-Hemphill, Inc. Yarn test system which moves yarn at high speed under constant, adjustable tension
US5797532A (en) * 1994-07-27 1998-08-25 Double E Company, Inc. Web edge control system
US20080111016A1 (en) * 2006-11-15 2008-05-15 Scott Edward Ackerman Device for reducing the tension on an elastomeric feed
CN102390744A (zh) * 2011-06-28 2012-03-28 无锡舜特金属制品有限公司 钢带送料辊子支架
CN103569720A (zh) * 2012-08-08 2014-02-12 大连大富塑料彩印有限公司 分切机废边中断自动报警装置
CN103803327A (zh) * 2014-02-28 2014-05-21 成都大漠石油机械有限公司 石油管件包装膜的保持张力结构
CN105151909A (zh) * 2015-09-10 2015-12-16 成都聚智工业设计有限公司 化纤丝张紧机构
CN105855620A (zh) * 2016-06-13 2016-08-17 太仓巨仁光伏材料有限公司 一种铜皮送料装置

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2934456C2 (de) * 1979-08-25 1983-11-10 Wilhelm E. 4000 Düsseldorf Frede Vorrichtung zum Aufrechterhalten einer Zugkraft von vorgegebener Größe in einem Band
IT1189914B (it) * 1986-01-20 1988-02-10 Gd Spa Dispositivo di alimentazione di carta in nastro in una macchina confezionatrice di sigarette a doppio baco
DE3613968A1 (de) * 1986-04-24 1987-10-29 Heidelberger Druckmasch Ag Vorrichtung zum erzeugen einer einstellbaren kraft an druckmaschinen
IT1278634B1 (it) * 1995-03-27 1997-11-27 Vogue Srl Dispositivo per l'alimentazione ed il tensionamento dei fili in una macchina tessile
DE19726874A1 (de) * 1997-06-25 1999-01-07 Roland Man Druckmasch Vorrichtung zur Veränderung der Bahnspannung in einer Rotationsdruckmaschine
DE10342838A1 (de) * 2003-09-17 2005-04-21 Oce Printing Systems Gmbh Vorrichtung zur Erzeugung einer Schlaufe in einem Vorratspuffer für eine über den Vorratspuffer verlaufende Materialbahn

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1586719A (en) * 1922-08-25 1926-06-01 Continental Paper & Bag Mills Compensating or regulating device for paper webs
US3460729A (en) * 1967-04-13 1969-08-12 Harris Intertype Corp Web tension control mechanism

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733876A (en) * 1956-02-07 Web tenfskbsr mechanism
US2710153A (en) * 1954-03-11 1955-06-07 Research Corp Web tension control system
US3239161A (en) * 1963-12-31 1966-03-08 Orville V Dutro Rollstand drive

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1586719A (en) * 1922-08-25 1926-06-01 Continental Paper & Bag Mills Compensating or regulating device for paper webs
US3460729A (en) * 1967-04-13 1969-08-12 Harris Intertype Corp Web tension control mechanism

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981000395A1 (fr) * 1979-08-10 1981-02-19 V Mulyar Dispositif de mesure de commande du rapport d'extensibilite elastique d'une toile de lin mobile
US4549701A (en) * 1983-12-16 1985-10-29 Beloit Corporation Web tension load cell
US4609336A (en) * 1984-10-17 1986-09-02 Gencorp Inc. Apparatus and method for extrusion
US5255836A (en) * 1988-07-27 1993-10-26 The Perkin-Elmer Corporation Flame spray gun with wire feed control
US5797532A (en) * 1994-07-27 1998-08-25 Double E Company, Inc. Web edge control system
WO1996004100A1 (en) * 1994-08-04 1996-02-15 Lawson-Hemphill, Inc. Yarn test system which moves yarn at high speed under constant, adjustable tension
US20080111016A1 (en) * 2006-11-15 2008-05-15 Scott Edward Ackerman Device for reducing the tension on an elastomeric feed
US7604148B2 (en) * 2006-11-15 2009-10-20 The Goodyear Tire & Rubber Company Device for reducing the tension on an elastomeric feed
CN102390744A (zh) * 2011-06-28 2012-03-28 无锡舜特金属制品有限公司 钢带送料辊子支架
CN103569720A (zh) * 2012-08-08 2014-02-12 大连大富塑料彩印有限公司 分切机废边中断自动报警装置
CN103803327A (zh) * 2014-02-28 2014-05-21 成都大漠石油机械有限公司 石油管件包装膜的保持张力结构
CN105151909A (zh) * 2015-09-10 2015-12-16 成都聚智工业设计有限公司 化纤丝张紧机构
CN105855620A (zh) * 2016-06-13 2016-08-17 太仓巨仁光伏材料有限公司 一种铜皮送料装置
CN105855620B (zh) * 2016-06-13 2018-03-02 太仓巨仁光伏材料有限公司 一种铜皮送料装置

Also Published As

Publication number Publication date
FR2219097A1 (en)) 1974-09-20
DE2406581C2 (de) 1985-03-14
CH562158A5 (en)) 1975-05-30
DE2406581A1 (de) 1974-09-05
GB1431241A (en) 1976-04-07
SE382614B (sv) 1976-02-09
JPS5048387A (en)) 1975-04-30
FR2219097B1 (en)) 1977-06-10
IT1008305B (it) 1976-11-10

Similar Documents

Publication Publication Date Title
US3870214A (en) Web tensioning device
US4341335A (en) Method and apparatus for controlling tension in a moving material
US3837593A (en) Supporting-roller reeling apparatus
US2984429A (en) Single rollstand web handling machine
US2710153A (en) Web tension control system
US3710927A (en) Belt aligning apparatus
US3490674A (en) Web alignment apparatus
US3546067A (en) Apparatus for breaking the curl in traveling material webs formed of paper,cardboard or the like
US3592371A (en) Band width controller
CN207844627U (zh) 卷材张紧输送装置
US3239161A (en) Rollstand drive
GB2053856A (en) Device for regulating the tension of a travelling web
US3453847A (en) Sheet guiding and tensioning device
US3910522A (en) Web tension control system
US3604649A (en) Method and apparatus for winding up traveling webs
US3390823A (en) Web guide apparatus
US2787463A (en) Web tension control mechanism
GB1561354A (en) Device for the centering of an endless belt for a machine for the drying of hides or the like
CN103072369A (zh) 多色印刷机的纸材输送装置
US2218548A (en) Differential tension device
US3466940A (en) Mechanism for tensioning endless belt-like members
US2926600A (en) Method and means of supercalendering
US2901191A (en) Paper machinery
US4693126A (en) Feed roll for material web transporting and measuring web tension
US5699898A (en) Apparatus for adjusting one of the bearing blocks of a roller