EP0465259B1 - Rouleau élastique pour l'alimentation de papier - Google Patents
Rouleau élastique pour l'alimentation de papier Download PDFInfo
- Publication number
- EP0465259B1 EP0465259B1 EP19910306106 EP91306106A EP0465259B1 EP 0465259 B1 EP0465259 B1 EP 0465259B1 EP 19910306106 EP19910306106 EP 19910306106 EP 91306106 A EP91306106 A EP 91306106A EP 0465259 B1 EP0465259 B1 EP 0465259B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- elastic roller
- paper feeding
- elastic
- paper
- 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
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
- B65H20/00—Advancing webs
- B65H20/02—Advancing webs by friction roller
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H27/00—Special constructions, e.g. surface features, of feed or guide rollers for webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2404/00—Parts for transporting or guiding the handled material
- B65H2404/10—Rollers
- B65H2404/13—Details of longitudinal profile
- B65H2404/131—Details of longitudinal profile shape
- B65H2404/1316—Details of longitudinal profile shape stepped or grooved
- B65H2404/13161—Regularly spaced grooves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2404/00—Parts for transporting or guiding the handled material
- B65H2404/10—Rollers
- B65H2404/13—Details of longitudinal profile
- B65H2404/132—Details of longitudinal profile arrangement of segments along axis
- B65H2404/1321—Segments juxtaposed along axis
Definitions
- the present invention relates to an elastic roller according to the preamble of claim 1 and the preamble of claim 2. for paper feeding in a paper feeder of copier, printer of information processing apparatus or the like.
- Such an elastic roller is known from EP-A-0 281 498.
- 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 30 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.
- EP-A-0281498 and US-A-4869410 each disclose an elastic roller for feeding paper by use of frictional force.
- An outer circumferential surface of the roller is divided into a plurality of sections. In this way a surface layer part of each of these sections may easily be deformed.
- 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 400g 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 100g 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 400g 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.
- an elastic roller for paper feeding making use of frictional force wherein an outer circumferential surface of said roller is divided into plural sections, so that a surface layer part of each of said sections may be easily deformed, characterised in that multiple microveins with a pitch not greater than 1 mm and front end width not greater than 0.5 mm are formed on an outer circumferential surface of said roller, orthogonally to the direction in which paper is conveyed.
- an elastic roller for paper feeding by making use of frictional force wherein an outer circumferential surface of said roller is divided into plural sections, so that a surface layer part of each of said sections may be easily deformed, characterised in that annular cuts are formed at a predetermined pitch in an outer circumferential surface of said roller.
- each narrow elastic roller is easily deformable owing to the annular cuts, which, in combination with the deformability of edge portions of each narrow elastic roller, further increase the frictional resistance to paper to obtain a greater conveying force.
- 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.
- the elastic rollers for paper feeding in the first embodiment of the invention will now be explained with reference to Fig. 1.
- the elastic roller 20 shown in Fig. 1 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 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.
- Table 4 shows the measurement result of the experiment conducted for proving that the elastic roller of the first embodiment can exhibit a great conveying force. That is, in the experiment, rubber rollers of 38 ⁇ outside diamter, 20 ⁇ inside diameter and 40 mm width were processed as shown in Fig. 2 A to E to obtain the elastic rollers No. 1 to No. 5 for the first embodiment, while the elastic roller No. 6 was not processed, and the coefficient of friction ⁇ for plain paper and OHP film was measured.
- the experimental conditions were as follows: load of 400g, roller peripheral speed of 100 mm/s, temperature of 23°C and humidity of 55%. Numerals appearing in Fig. 2 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 this 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. 5 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. 6A to C, and for the surface ground roller as a comparative one, in the conditions of load of 100g and roller peripheral speed of 500 mm/s.
- the veins of the triangular cross-section shown in Fig. 6A 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 a 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)
Claims (2)
- Rouleau élastique (40) servant à une alimentation en papier, utilisant une force de friction, dans lequel une surface circonférentielle (41) extérieur dudit rouleau (40) est divisée en plusieurs sections, de manière à ce qu'une partie de la couche de surface de chacune desdites sections puisse être facilement déformée, caractérisé en ce que des micronervures (41a) multiples avec un pas ne dépassant pas 1 mm et une largeur d'extrémité avant ne dépassant pas 0,5 mm sont formées sur une surface circonférentielle extérieure (41) dudit rouleau (40), perpendiculairement à la direction dans laquelle est transporté le papier.
- Rouleau élastique (40) servant à une alimentation en papier, utilisant une force de friction, dans lequel une surface circonférentielle extérieure (41) dudit rouleau (40) est divisée en plusieurs sections, de manière à ce qu'une partie de la couche de surface de chacune desdites sections puisse être facilement déformée, caractérisé en ce que des découpes annulaires (22) sont formées selon un pas prédéterminé dans une surface circonférentielle extérieure dudit rouleau (40).
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP72387/90 | 1990-07-06 | ||
JP1990072387U JP2526564Y2 (ja) | 1990-07-06 | 1990-07-06 | 給紙装置用ゴムロール |
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 EP0465259A1 (fr) | 1992-01-08 |
EP0465259B1 true 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) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
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 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3375129D1 (en) * | 1982-10-29 | 1988-02-11 | Newtec Int | Stretching device |
DE3513346A1 (de) * | 1985-04-13 | 1986-10-16 | Agfa-Gevaert Ag, 5090 Leverkusen | Lagervorrichtung fuer eine umlenk- oder transportwalzenwelle oder -achse in einer durchlaufbehandlungsmaschine fuer fotografische schichttraeger |
CH669584A5 (fr) * | 1986-07-21 | 1989-03-31 | Grapha Holding Ag | |
DE3705857A1 (de) * | 1987-02-24 | 1988-09-01 | Mannesmann Ag | Vorrichtung fuer den papiertransport von einzelblaettern und/oder endlosbahnen in bueromaschinen, insbesondere in matrixdruckern |
JPH01137451A (ja) * | 1987-11-24 | 1989-05-30 | Otani Denki Kk | テープ収容装置 |
-
1991
- 1991-07-04 DE DE1991606605 patent/DE69106605T2/de not_active Expired - Fee Related
- 1991-07-04 EP EP19910306106 patent/EP0465259B1/fr not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE69106605D1 (de) | 1995-02-23 |
DE69106605T2 (de) | 1995-05-18 |
EP0465259A1 (fr) | 1992-01-08 |
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