EP0465259A1 - Rouleau élastique pour l'alimentation de papier - Google Patents

Rouleau élastique pour l'alimentation de papier Download PDF

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Publication number
EP0465259A1
EP0465259A1 EP91306106A EP91306106A EP0465259A1 EP 0465259 A1 EP0465259 A1 EP 0465259A1 EP 91306106 A EP91306106 A EP 91306106A EP 91306106 A EP91306106 A EP 91306106A EP 0465259 A1 EP0465259 A1 EP 0465259A1
Authority
EP
European Patent Office
Prior art keywords
roller
elastic roller
elastic
paper feeding
outer circumferential
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
EP91306106A
Other languages
German (de)
English (en)
Other versions
EP0465259B1 (fr
Inventor
Hiroaki Tanaka
Yasutoki Ito
Masahiko Ueno
Hitoshi Itani
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.)
Sumitomo Rubber Industries Ltd
Original Assignee
Sumitomo Rubber Industries Ltd
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 claimed from JP1990072387U external-priority patent/JP2526564Y2/ja
Priority claimed from JP2202649A external-priority patent/JPH0489728A/ja
Application filed by Sumitomo Rubber Industries Ltd filed Critical Sumitomo Rubber Industries Ltd
Publication of EP0465259A1 publication Critical patent/EP0465259A1/fr
Application granted granted Critical
Publication of EP0465259B1 publication Critical patent/EP0465259B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00Advancing webs
    • B65H20/02Advancing webs by friction roller
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H27/00Special constructions, e.g. surface features, of feed or guide rollers for webs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00Parts for transporting or guiding the handled material
    • B65H2404/10Rollers
    • B65H2404/13Details of longitudinal profile
    • B65H2404/131Details of longitudinal profile shape
    • B65H2404/1316Details of longitudinal profile shape stepped or grooved
    • B65H2404/13161Regularly spaced grooves
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00Parts for transporting or guiding the handled material
    • B65H2404/10Rollers
    • B65H2404/13Details of longitudinal profile
    • B65H2404/132Details of longitudinal profile arrangement of segments along axis
    • B65H2404/1321Segments juxtaposed along axis

Definitions

  • the present invention relates to an elastic roller for paper feeding in a paper feeder of copier, printer of information processing apparatus or the like.
  • an elastic roller is used for paper feeding.
  • Such elastic roller is required to have a large conveying force in order to attain a reliable paper feeding.
  • a greater conveying force is required when feeding film for overhead projector (OHP).
  • an elastic roller with a ground surface (hereinafter called surface ground roller) has been in use.
  • the surface ground roller obtains a large conveying force by increasing the frictional force against paper being conveyed by grinding and roughening the surface, the manufacturing cost is greatly raised for the addition of the process of surface grinding. Moreover, the surface ground pattern is worn as the paper feeding is repeated, and the conveying force is lowered as the wearing progresses, deteriorating paper feeding condition in a short period.
  • the surface roughness of the surface ground roller is usually about 3 to 100 ⁇ , and accordingly the surface wearing of only 0.2 mm makes the surface smooth and slick, where paper cannot be fed satisfactorily.
  • the surface ground roller is specified in the direction of frictional force since the surface ground roller has on its surface directional markings caused by abrasive in the process of surface grinding.
  • Fig. 10 shows the result of experiment conducted to prove the orientation of frictional force of the surface ground roller. In this experiment, by installing the surface ground roller in correct direction (normal grain use) and in wrong direction (reverse grain use), the coefficient of friction with respect to the surface roughness was measured.
  • the conditions of the experiment were 200 g in load, 250 mm/s in roller peripheral speed, 23°C in temperature, and 55% in humidity. As a result, it is known that the coefficient of friction is greater in the normal grain use than in the reverse grain use. It is hence evident that the surface ground roller is specified in direction.
  • the invention has been devised in the light of the foregoing, and it is a primary object thereof to provide an elastic roller for paper feeding capable of exhibiting a large conveying force, using an existing rubber compound.
  • the present inventors as a result of intensive studies to achieve the above object, have found the elastic roller for paper feeding capable of exhibiting a great conveying force using an existing rubber compound.
  • the inventors prepared rubber rollers of the width of 40 mm, 30 mm, 20 mm and 10 mm each for the outside diameters of 38 ⁇ , 34 ⁇ , 31 ⁇ , 27 ⁇ , 24 ⁇ , and measured the coefficient of friction ⁇ in the conditions of load of 100 to 400 g and roller peripheral speed of 100 to 500 mm/s.
  • the results obtained are as shown in Table 1 as for the outside diameters of 38 ⁇ , 31 ⁇ , 24 ⁇ at the load of 100 g and roller peripheral speed of 100 mm/s, and as shown in Table 2 as for the outside diameters of 38 ⁇ , 31 ⁇ , 24 ⁇ at the load of 400 g and roller peripheral speed of 500 mm/s.
  • the elastic roller for paper feeding in which a large conveying force is required it is preferable to have a plurality of narrow rubber rollers instead of one broad roller.
  • the reason for the increase in frictional force is considered to be such that the surface layer portion of the rubber roller is easily, elastically deformable when the rubber roller width is narrower than when broader, so that the frictional resistance to paper increases.
  • the inventors have discovered it effective to divide the outer circumferential surface of the elastic roller so that the surface layer portion thereof may be easily deformed in order to obtain an elastic roller for paper feeding exhibiting a great conveying force even with an existing rubber compound.
  • the invention provides an elastic roller for paper feeding comprising a plurality of narrow elastic rollers disposed parallel at a predetermined pitch.
  • the invention also provides an elastic roller for paper feeding having plural annular cuts formed at a predetermined pitch in the outer circumferential surface thereof.
  • the surface layer portion of the elastic roller is easily deformable owing to the presence of the plural annular cuts, resulting in an increased frictional resistance to paper, so that a great conveying force is obtained.
  • the invention further provides an elastic roller for paper feeding having plural annular grooves formed at a predetermined pitch in the outer circumferential surface thereof.
  • the invention provides an elastic roller for paper feeding comprising a plurality of narrow elastic rollers disposed parallel at a predetermined pitch, and annular cuts or grooves are formed in the outer circumferential surface of each of the narrow elastic rollers.
  • each narrow elastic roller is easily deformable owing to the annular cuts or grooves, which, in combination with the deformability of edge portions of each narrow elastic roller, further increases the frictional resistance to paper to obtain a greater conveying force.
  • the invention provides an elastic roller for paper feeding having annular grooves formed at a predetermined pitch in the outer circumferential surface thereof, and annular cuts are formed in the surface portions or lands between the adjacent annular grooves and between the annular grooves at both ends and the both end edges of the outer circumferential surface.
  • the surface layer portions of the elastic roller is easily deformable owing to the plural annular cuts, which, in combination with the deformability of the edge portions adjacent the annular grooves, serves to increase the frictional resistance to paper, thereby ensuring a great conveying force.
  • the invention provides an elastic roller for paper feeding having multiple ridges or microveins with top end width of 0.5 mm or less formed, on the outer circumferential surface at a pitch not greater than 1 mm and orthogonally in the paper conveying direction.
  • an elastic roller for paper feeding capable of exhibiting a great conveying force is provided, using an existing rubber compound, and as compared with the conventional method of considering the material blending, the time, labor and material cost may be greatly saved.
  • the frictional force is not specified in direction, and there is no difference in the conveying force depending on the rotating direction. Consequently, a plurality of elastic rollers, if mounted at random with regard to rotational direction, may be utilized concurrently without attendance of any troubles such as those encountered by the surface ground roller.
  • This elastic roller 10 comprises a plurality of, for example, four narrow rollers 11 disposed parallel at a predetermined pitch.
  • the area of contact with the paper being conveyed increases owing to an elastic deformation of the edge portions 11a of the rollers 11 so that a great conveying force is obtained.
  • Table 4 shows the measurement results of the experiment conducted to explain that the elastic roller 10 of the first embodiment produces a large conveying force. That is, in the experiment, the conveying force for plain paper wasmeasured, with the three elastic rollers a to c fabricated as shown in Fig. 2 A to C, in the experimental condition of load of 400 g, and roller peripheral speed of 100 mm/s.
  • the elastic rollers a to c measure 38 ⁇ in outside diameter, 8 ⁇ in inside diameter.
  • the elastic rollers for paper feeding in the second and third embodiments of the invention will now be explained with reference to Figs. 3 and 4.
  • the elastic roller 2 shown in Fig. 3 has a plurality of, for example, seven annular cuts 22 formed at a predetermined pitch in the outer circumference of a broad roller 21.
  • the elastic roller 30 of the third embodiment in Fig. 4 has a plurality of, for example, six annular grooves 32 formed at a predetermined pitch in the outer circumference of a broad roller 31.
  • the surface of the roller 21 is easily deformable owing to the presence of the cuts 23 and the contact area with the paper increases, so that a larger conveying force is obtained.
  • the annular grooves 32 allow multiple edge parts 31a formed on the outer circumference of the roller 31 to be deformable, thereby increasing the area of contact with the paper, and ensuring a large conveying force.
  • Table 5 shows the measurement result of the experiment conducted for proving that the elastic roller of the second embodiment and the elastic roller of the third embodiment can exhibit a great conveying force. That is, in the experiment, rubber rollers of 38 ⁇ outside diameter, 20 ⁇ inside diameter and 4 mm width were processed as shown in Fig. 5 A to E to obtain the elastic rollers No. 1 to No. 5 for the second embodiment, and processed as shown in fig. 5 F to I to obtain the elastic rollers No. 6 to No. 9 for the second embodiment, while the elastic roller No. 10 was not processed, and the coefficient of friction ⁇ for plain paper and OHP film was measured.
  • the experimental conditions were as follows: load of 400 g, roller peripheral speed of 100 mm/s, temperature of 23°C and humidity of 55%. Numerals appearing in Fig. 5 indicate the dimensions in the unit of mm.
  • ridges or veins 41a having a triangular cross-section are formed on the outer circumference of the broad roller 41, the pitch between the adjoining veins 41a being 1 mm or less.
  • the veins 41a are formed on the outer circumference at a pitch of 1 mm or less, the surface roughness on the outer circumference of the roller 41 is coarse same as on the surface ground roller, and the frictional resistance with the paper increases, so that a great conveying force is brought about.
  • the veins 41a are shown as having a triangular cross-section,but it is not limitative in the invention, and the cross-sectional shape may be other than triangular as far as the pitch of the veins 41a is not greater than 1 mm and the top end width is not greater than 0.5 mm.
  • Fig. 8 shows the result of experiment for three elastic rollers having the shape, dimension (unit: mm), pitch, top end width and height of veins as shown in Fig. 9 A to C, and for the surface ground roller as a comparative one, in the conditions of load of 100 g and roller peripheral speed of 500 mm/s.
  • the veins of the triangular cross-section shown in Fig. 9A is pointed at the top, and has not top end width as such.
  • the veins may preferably have a pitch not greater than 1 mm and top end edge not greater than 0.5 mm, and when these conditions are satisfied, the surface does not become slick, with less lowering of conveying force if the wear is promoted, unlike the surface ground roller.

Landscapes

  • Delivering By Means Of Belts And Rollers (AREA)
  • Handling Of Cut Paper (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
EP19910306106 1990-07-06 1991-07-04 Rouleau élastique pour l'alimentation de papier Expired - Lifetime EP0465259B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP1990072387U JP2526564Y2 (ja) 1990-07-06 1990-07-06 給紙装置用ゴムロール
JP72387/90 1990-07-06
JP202649/90 1990-07-30
JP2202649A JPH0489728A (ja) 1990-07-30 1990-07-30 給紙用弾性体ローラ

Publications (2)

Publication Number Publication Date
EP0465259A1 true EP0465259A1 (fr) 1992-01-08
EP0465259B1 EP0465259B1 (fr) 1995-01-11

Family

ID=26413524

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910306106 Expired - Lifetime EP0465259B1 (fr) 1990-07-06 1991-07-04 Rouleau élastique pour l'alimentation de papier

Country Status (2)

Country Link
EP (1) EP0465259B1 (fr)
DE (1) DE69106605T2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011129758A1 (fr) * 2010-04-15 2011-10-20 Tetra Laval Holdings & Finance S.A. Cylindre de stratification, procédé pour produire un stratifié d'emballage et stratifié d'emballage
CN102896877A (zh) * 2012-09-19 2013-01-30 铜陵其利电子材料有限公司 一种镀膜机用碾平辊
AU2015203848B2 (en) * 2010-04-15 2016-08-25 Tetra Laval Holdings & Finance S.A. A laminating roller, a method for providing a packaging laminate, and a packaging laminate

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0281498A2 (fr) * 1987-02-24 1988-09-07 MANNESMANN Aktiengesellschaft Dispositif de transport de feuilles et/ou de bandes dans des machines de bureau, en particulier des imprimantes matrix
US4792076A (en) * 1986-07-21 1988-12-20 Grapha-Holding Ag Web transporting apparatus
US4842179A (en) * 1985-04-13 1989-06-27 Agfa-Gevaert Aktiengesellschaft Wet processing arrangement for photosensitive material
US4869410A (en) * 1987-11-24 1989-09-26 Otari Electric Co., Ltd. Magnetic tape container
US5000364A (en) * 1982-10-29 1991-03-19 Societe Des Etablissements Thimon Apparatus for obtaining differential tangential variable speeds at different points of a deformable film

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5000364A (en) * 1982-10-29 1991-03-19 Societe Des Etablissements Thimon Apparatus for obtaining differential tangential variable speeds at different points of a deformable film
US4842179A (en) * 1985-04-13 1989-06-27 Agfa-Gevaert Aktiengesellschaft Wet processing arrangement for photosensitive material
US4792076A (en) * 1986-07-21 1988-12-20 Grapha-Holding Ag Web transporting apparatus
EP0281498A2 (fr) * 1987-02-24 1988-09-07 MANNESMANN Aktiengesellschaft Dispositif de transport de feuilles et/ou de bandes dans des machines de bureau, en particulier des imprimantes matrix
US4869410A (en) * 1987-11-24 1989-09-26 Otari Electric Co., Ltd. Magnetic tape container

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011129758A1 (fr) * 2010-04-15 2011-10-20 Tetra Laval Holdings & Finance S.A. Cylindre de stratification, procédé pour produire un stratifié d'emballage et stratifié d'emballage
RU2540591C2 (ru) * 2010-04-15 2015-02-10 Тетра Лаваль Холдингз Энд Файнэнс С.А. Ламинирующий ролик, способ обеспечения упаковочного ламината и упаковочный ламинат
AU2011241170B2 (en) * 2010-04-15 2015-08-20 Tetra Laval Holdings & Finance S.A. A laminating roller, a method for providing a packaging laminate, and a packaging laminate
AU2015203848B2 (en) * 2010-04-15 2016-08-25 Tetra Laval Holdings & Finance S.A. A laminating roller, a method for providing a packaging laminate, and a packaging laminate
US9616645B2 (en) 2010-04-15 2017-04-11 Tetra Laval Holdings & Finance S.A. Laminating roller, a method for providing a packaging laminate, and a packaging laminate
US10611117B2 (en) 2010-04-15 2020-04-07 Tetra Laval Holdings & Finance S.A. Packaging laminate
CN102896877A (zh) * 2012-09-19 2013-01-30 铜陵其利电子材料有限公司 一种镀膜机用碾平辊

Also Published As

Publication number Publication date
EP0465259B1 (fr) 1995-01-11
DE69106605D1 (de) 1995-02-23
DE69106605T2 (de) 1995-05-18

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