EP0669275A1 - Accumulateur à boucle pour dispositif de transport de bande - Google Patents

Accumulateur à boucle pour dispositif de transport de bande Download PDF

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Publication number
EP0669275A1
EP0669275A1 EP94810118A EP94810118A EP0669275A1 EP 0669275 A1 EP0669275 A1 EP 0669275A1 EP 94810118 A EP94810118 A EP 94810118A EP 94810118 A EP94810118 A EP 94810118A EP 0669275 A1 EP0669275 A1 EP 0669275A1
Authority
EP
European Patent Office
Prior art keywords
loop
roller
buffer according
loop buffer
loop roller
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.)
Granted
Application number
EP94810118A
Other languages
German (de)
English (en)
Other versions
EP0669275B1 (fr
Inventor
Guido Keller
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.)
Gretag Imaging AG
Original Assignee
Gretag Imaging 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 Gretag Imaging AG filed Critical Gretag Imaging AG
Priority to DE59408359T priority Critical patent/DE59408359D1/de
Priority to EP94810118A priority patent/EP0669275B1/fr
Priority to US08/377,002 priority patent/US5597105A/en
Priority to CA002143164A priority patent/CA2143164A1/fr
Priority to JP7059783A priority patent/JPH0834549A/ja
Publication of EP0669275A1 publication Critical patent/EP0669275A1/fr
Application granted granted Critical
Publication of EP0669275B1 publication Critical patent/EP0669275B1/fr
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
    • B65H20/30—Arrangements for accumulating surplus web
    • B65H20/32—Arrangements for accumulating surplus web by making loops
    • B65H20/34—Arrangements for accumulating surplus web by making loops with rollers

Definitions

  • the invention relates to a loop buffer with a variable loop length for a transport device for tape material, in particular photographic film material composed of individual sections to form a continuous tape, each with an input-side and an output-side, possibly motor-driven deflection roller and a loop roller which is mounted so as to be essentially vertically movable between them.
  • the relative height of the pulleys determines the length of the loop
  • Loop buffers of this type are used in belt transport devices for decoupling asynchronous transport speeds in different stations of the transport route.
  • a special field of application is generally known as a printer for processing systems for photographic film material, in whose individual processing sections there are very different speed ratios. There are sections in which the strip material is fed substantially uniformly continuously, and other sections (e.g. the notching station and the exposure station) in which the strip material is transported in larger or smaller steps.
  • loop roll In the previously known loop buffers of the generic type, the loop roll is either relatively heavy or is loaded downwards by means of a spring, the spring travel covering the entire stroke range of the loop roll. This ensures reliable guidance of the strip material.
  • these loop buffers occur when there are strong or abrupt changes in the speed of the tape feed, such as with intermittent feed, strong impacts and tension peaks in the strip material, which pose a great risk of damage to the strip material and / or lead to faults in the neighboring stations and are therefore highly undesirable.
  • the present invention is now intended to improve a loop buffer of the generic type in such a way that, on the one hand, the strip material is guided properly and, on the other hand, inadmissible tensions in the strip material are reliably avoided even when there are abrupt changes in speed.
  • the loop buffer should be suitable for photographic film material composed of individual short strips and possibly also provided with paper strips attached to the side.
  • the loop buffer according to the invention which fulfills this task, is characterized in that the loop roller is weight-loaded via a relatively soft spring by a ballast body which is guided in an essentially freely movable manner.
  • the loop roller and its bearing elements movable together with it have the lowest possible inert mass, preferably only a few grams.
  • the loop roller of the loop buffer according to the invention comprises two or three parallel, coaxial loop wheels of slightly different diameters, which are adapted to the thickness profile of the strip material transversely to the longitudinal direction.
  • film material is usually available when processing reorder orders and is known to place special demands on transport devices, since the stiffness of the strip material changes frequently along the strip length and the paper strips on the side can easily come off.
  • the loop buffer essentially comprises two parallel deflection rollers 1 and 2 and a loop roller 3 guided vertically up and down between the two deflection rollers.
  • a strip material B arriving from a first processing station, not shown, here in the form of a shorter strip B1 with paper attached to the side - Or plastic strips B2 by means of a continuous carrier tape B3 to form a longer tape photographic film tape runs to form a vertical loop over the three deflection and loop rollers 1, 2 and 3 to a second processing station, also not shown.
  • the feed of the strip material B is carried out asynchronously on the input and output sides by independent motor feed means, for example by the fact that the input and output deflection pulleys 1 and 2 are motor-driven.
  • the deflection rollers 1 and 2 can also run freely, and other known feed means for the strip material can be provided for this purpose.
  • the loop roller 3 is rotatably supported on a bearing slide 4, which is itself guided on a vertical slide rod 5 so that it can slide up and down.
  • the bearing slide 4 and thus indirectly also the loop roller 3 is weight-loaded via a helical spring 6 by a ballast body 7, which is also guided on the slide rod 5 and is freely movable up and down along this.
  • a lift symbolized here only by the double arrow 8 is provided, by means of which the bearing slide 4 and thus the loop roller 3 can be moved into a threading position (FIG. 6) above the level of the two deflection rollers 1 and 2.
  • Three optoelectronic position sensors (light barriers) 9a, 9b and 9c are arranged along the displacement path of the loop roller 3 and the bearing slide 4, respectively, which define vertical limit positions for the loop roller 3 and interact with a controller 10 which, depending on the position of the loop roller 3, has control signals 10a and 10b to the feed means (here the deflection rollers 1 and 2) for the strip material to and from the loop buffer in order to keep the loop length in the loop buffer within predetermined minimum and maximum values.
  • a controller 10 which, depending on the position of the loop roller 3, has control signals 10a and 10b to the feed means (here the deflection rollers 1 and 2) for the strip material to and from the loop buffer in order to keep the loop length in the loop buffer within predetermined minimum and maximum values.
  • the feed means here the deflection rollers 1 and 2
  • the position sensors still serve to control the movement of the loop roller 3 into the threading position mentioned and back into the normal working position, which is symbolically indicated by the signal line 10c.
  • the loop roller 3 is lifted by means of the lift 8 over the two deflection rollers 1 and 2 and the strip material is advanced by means of guide elements, not shown here, over the space between the two deflection rollers until it is gripped by the feed means on the output side.
  • the loop roller 3 is then lowered into a working position by means of the lift 8, the buffer loop being formed. If there are speed differences between the input-side and output-side belt feed during operation, the loop length decreases or increases, the loop roller 3 following accordingly, i.e. is raised or lowered. If the loop roll exceeds or falls below predefined limit positions, the controller 10 temporarily brakes or stops the feed on the input or the output side, depending on the case, until the loop roll is again within the predefined limit positions.
  • ballast body 7 remains practically stationary due to its inertia. Prolonged speed differences lead (within the predetermined limits) to a drifting movement of the loop roller 3 upwards or downwards, the ballast body 7 following the movement of the loop roller 3.
  • ballast mass of approximately 150 to approximately 400 grams is generally suitable for the photographic film material mentioned, as it is available for the processing of photographic reorder orders, the negligible mass of the loop roll 3 itself and the one fixed with it, as is evident from the following connected and movable parts (bearing elements etc.) is not included.
  • the abrupt Ge to keep the acceleration forces caused as low as possible, the mass of the loop roller 3 and the parts moving with it (bearing block 4 etc.) must be as low as possible overall. This can easily be achieved by means of a correspondingly simple structure and choice of particularly light construction materials, such as plastic.
  • total weights of approximately 50 to approximately 70 grams have proven to be practical.
  • the helical spring 6 coupling the ballast body 7 to the loop roller 3 is also of significant importance. On the one hand, it must be dimensioned soft enough to be able to absorb rapid deflections of the loop roll safely and quickly, and on the other hand it must not be too soft to avoid "punctures". In practice, springs with a spring constant in the range from about 0.2 to about 0.6 N / cm have proven themselves for the application mentioned.
  • FIGS. 2-4 show a practical embodiment of the loop buffer according to the invention which is particularly suitable for use in photographic processing or processing lines, the elements which do not form part of the actual essence of the subject matter of the invention being omitted for the sake of clarity.
  • the loop buffer (although possible in principle) is generally not designed as a physically independent and independent unit, but is usually integrated into a processing line for the strip material or into the strip material transport means of this line.
  • the part of the loop buffer shown comprises a frame R, to which all the elements associated with the mounting of the loop roll and its movement are fastened, so that the whole forms a mechanical unit, which as a whole, as a whole, lies between those usually in the processing line provided deflection rollers can be used, as can be seen from Fig.4.
  • the deflection rollers could also be arranged on this frame R.
  • two vertical slide rods 5a and 5b are fixed stationary between its two parallel legs, which are horizontal in the installed position. Furthermore, two pulleys 83 and 84 are rotatably mounted in two bearing blocks 81 and 82, of which the upper (83) is rotatably driven by a motor, not shown. The two pulleys 83 and 84 are wrapped in a transport belt 85, the two runs of which are parallel to the slide rods 5a and 5b, i.e. run vertically. The two pulleys 83 and 84 and the transport belt 85 together with the drive motor, not shown, form the aforementioned lift 8 for the vertical movement of the loop roller 3.
  • a substantially approximately L-shaped bearing slide 4 composed of several plastic parts is slidably guided by means of three bearing bushes 41, 42 and 43, two bearing bushes being provided on the front slide rod 5a and one on the rear slide rod 5b is.
  • the loop roller designated as a whole by 3
  • Another bearing carriage 44 is located just below the mentioned bearing carriage 4 and is clamped to one strand of the transport belt 85. The bearing carriage 44 engages under the bearing carriage 4, so that the bearing carriage 4 can be moved upwards by means of the transport belt. The downward movement of the bearing slide 4 is driven by gravity alone.
  • a flat guide element 34 is fastened to the bearing slide 4 just below the loop roller 3 and bridges the gap between the two deflection rollers 1 and 2 in the threading position of the loop roller 3 shown in FIG.
  • the cylindrical ballast body 7, which is cylindrical here, is freely displaceable on the rear slide rod 5b. It is supported by the already mentioned, relatively soft coil spring 6 on the bearing slide 4 and thus indirectly loads the loop roller 3 with its weight.
  • three light barriers 9a, 9b and 9c are arranged in three different vertical positions, which serve as position sensors for the vertical position of the loop roller 3 in the manner already mentioned. They work together with a lamella 45 fastened to the bearing slide, which moves between the two legs of the light barriers.
  • the loop roller 3 here consists of three parallel loop wheels 31, 32 and 33, which sit on a common shaft 35.
  • the two loop wheels 31 and 32 have slightly stepped diameters, the third loop wheel 33 is a simple cylindrical roller.
  • the diameters of the individual loop wheels are matched to the cross-thickness profile of the belt material to be transported, which results in optimal guidance. This is particularly important if the tape material is such a "difficult" material as that often found in the photo laboratory, made up of individual film strips with and without lateral information carrier strips by means of a continuous carrier tape.
  • the deflecting rollers 1 and 2 are preferably also designed analogously. This has the added advantage of being shown with the comb-like design of the guide element 34, the distance between the two deflection rollers in the threading position can be better bridged.

Landscapes

  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Advancing Webs (AREA)
EP94810118A 1994-02-24 1994-02-24 Accumulateur à boucle pour dispositif de transport de bande Expired - Lifetime EP0669275B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE59408359T DE59408359D1 (de) 1994-02-24 1994-02-24 Schlaufenpuffer für Bandtransportvorrichtung
EP94810118A EP0669275B1 (fr) 1994-02-24 1994-02-24 Accumulateur à boucle pour dispositif de transport de bande
US08/377,002 US5597105A (en) 1994-02-24 1995-01-23 Apparatus for buffering a variable length loop of strip material
CA002143164A CA2143164A1 (fr) 1994-02-24 1995-02-22 Boucle tampon permettant l'avance controlee d'un materiau en bande, un film, par exemple
JP7059783A JPH0834549A (ja) 1994-02-24 1995-02-23 ストリップコンベヤのためのループ緩衝器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94810118A EP0669275B1 (fr) 1994-02-24 1994-02-24 Accumulateur à boucle pour dispositif de transport de bande

Publications (2)

Publication Number Publication Date
EP0669275A1 true EP0669275A1 (fr) 1995-08-30
EP0669275B1 EP0669275B1 (fr) 1999-06-02

Family

ID=8218213

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94810118A Expired - Lifetime EP0669275B1 (fr) 1994-02-24 1994-02-24 Accumulateur à boucle pour dispositif de transport de bande

Country Status (5)

Country Link
US (1) US5597105A (fr)
EP (1) EP0669275B1 (fr)
JP (1) JPH0834549A (fr)
CA (1) CA2143164A1 (fr)
DE (1) DE59408359D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0812791A2 (fr) * 1996-06-13 1997-12-17 Shikoku Kakoki Co., Ltd. Réservoir de stockage intermédiaire pour bandes de matériau

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5772147A (en) * 1995-07-21 1998-06-30 Gerber Garment Technology, Inc. Apparatus for performing a work operation on sheet material and a sheet material feed mechanism therefor
US5765481A (en) * 1997-03-11 1998-06-16 Gerber Scientific Products, Inc. Apparatus and method for working on a length of web material
EP0987597B1 (fr) 1998-09-15 2004-08-25 Imip Llc Tampon pour matériau photographique
US6575455B2 (en) 2000-04-14 2003-06-10 Teknologi & Produkt Udvikling A/S Apparatus for inverting and returning sheets from a printer for large-sized paper
US6588641B2 (en) * 2001-04-11 2003-07-08 Prittie Family Trust 1989 Method and apparatus for handling web
JP2004155533A (ja) * 2002-11-05 2004-06-03 Fuji Xerox Co Ltd 連続紙搬送機構及びこれを有する印刷装置
US7398903B2 (en) * 2003-09-10 2008-07-15 Komax Holding Ag Wire-feeding device for a wire-processing machine
DE10356055A1 (de) * 2003-12-01 2005-06-23 Iwk Verpackungstechnik Gmbh Blister-Verpackungsmaschine
US20060132584A1 (en) * 2004-12-20 2006-06-22 Jobmann Brian C System and Method for Feeding and Cutting Media for Continuous Printing
US7392634B1 (en) 2005-06-16 2008-07-01 Maye Anthony J Web printing and feed machine and method
WO2009092646A2 (fr) * 2008-01-25 2009-07-30 Oerlikon Assembly Equipment Ag, Steinhausen Procédé et appareil pour monter un morceau de feuille sur un substrat
CN104386520B (zh) * 2014-09-28 2016-08-17 昆山一鼎工业科技有限公司 一种双面异形料带产品缓冲机
JP6357077B2 (ja) * 2014-10-30 2018-07-11 株式会社沖データ 媒体搬送装置及び画像形成装置
CN104773572A (zh) * 2015-03-20 2015-07-15 上海轮胎橡胶（集团）股份有限公司轮胎研究所 用于钢丝压出包胶机的胶条牵引储存装置
CN108248947A (zh) * 2017-12-05 2018-07-06 金华市志能科技有限公司 包胶机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3727820A (en) * 1972-02-18 1973-04-17 Hunter Eng Co Method and apparatus for continuously processing strip
DE2227995A1 (de) * 1972-06-08 1974-01-03 Giesenhagen Kg Durchlaufspeicher fuer bandfoermiges material
WO1987002019A1 (fr) * 1985-09-30 1987-04-09 Joachim Seidl Dispositif pour le traitement de materiaux en bandes sans fin avec plusieurs postes de traitement a des vitesses differentes
US5197644A (en) * 1988-11-29 1993-03-30 The Walt Disney Company Film cabinet with roller attachment and film transfer mechanisms

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123317A (en) * 1964-03-03 Tension control device
US2008618A (en) * 1933-03-13 1935-07-16 Albion J Lefebvre Combined regulator and indicator
US2435298A (en) * 1944-07-01 1948-02-03 John F Van Leuven Portable film rack
US2913885A (en) * 1957-02-15 1959-11-24 Debrie Andre Victor Le Clement Friction drive for photographic or cinematographic films and the like
US3942190A (en) * 1974-03-21 1976-03-02 Matsushita Electric Industrial Co., Ltd. Method and apparatus for uninterrupted recording and reproduction in a multichannel mode of information on tape
US4350277A (en) * 1980-09-16 1982-09-21 Pako Corporation Photographic print paper guide spool
DE3306139A1 (de) * 1983-02-22 1984-08-30 Hermann 8500 Nürnberg Kümmerl Transportvorrichtung zur durchfuehrung von band- oder blattfoermigen fotografischen schichttraegern durch fotochemische baeder von entwicklungsmaschinen
US5050812A (en) * 1990-12-05 1991-09-24 Sterling Envelope Corporation Dual-envelope making machine and method of using

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3727820A (en) * 1972-02-18 1973-04-17 Hunter Eng Co Method and apparatus for continuously processing strip
DE2227995A1 (de) * 1972-06-08 1974-01-03 Giesenhagen Kg Durchlaufspeicher fuer bandfoermiges material
WO1987002019A1 (fr) * 1985-09-30 1987-04-09 Joachim Seidl Dispositif pour le traitement de materiaux en bandes sans fin avec plusieurs postes de traitement a des vitesses differentes
US5197644A (en) * 1988-11-29 1993-03-30 The Walt Disney Company Film cabinet with roller attachment and film transfer mechanisms

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0812791A2 (fr) * 1996-06-13 1997-12-17 Shikoku Kakoki Co., Ltd. Réservoir de stockage intermédiaire pour bandes de matériau
EP0812791A3 (fr) * 1996-06-13 1998-02-04 Shikoku Kakoki Co., Ltd. Réservoir de stockage intermédiaire pour bandes de matériau
US5810236A (en) * 1996-06-13 1998-09-22 Shikoku Kakoki Co., Ltd. Web accumulator

Also Published As

Publication number Publication date
CA2143164A1 (fr) 1995-08-25
EP0669275B1 (fr) 1999-06-02
US5597105A (en) 1997-01-28
DE59408359D1 (de) 1999-07-08
JPH0834549A (ja) 1996-02-06

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