Paper feed roller

a feed roller and paper feed technology, applied in the direction of transportation and packaging, article separation, thin material processing, etc., can solve the problems of paper sheet transport failure, and no paper feed roller that mitigates the accumulation of paper powder insufficiently

Inactive Publication Date: 2020-02-20
SUMITOMO RIKO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The disclosed patent is about a roller for a paper feed device that prevents paper powder accumulation and failure in paper sheet transport. The roller has grooves and protrusions that allow paper powder to easily escape and be discharged without clogging the roller. The width of the grooves is larger than the separation distance of the protrusions, which prevents paper powder from accumulating in the roller. The protrusions are arranged in rows and have curved surfaces that contact the paper sheet, reducing the generation of paper powder. The protrusions are also angled to facilitate the escape of paper powder. Overall, the roller design prevents paper powder-related issues and improves paper feed performance.

Problems solved by technology

As a result, paper sheet transport failure may occur.
There is no conventional paper feed roller that sufficiently mitigates accumulation of paper powder and maintains a satisfactory coefficient of friction for a long period of time from an initial stage of use.
In particular, paper sheets that have been used in recent years include paper sheets with low quality, and such paper sheets with low quality are likely to generate paper powder and are likely to cause paper sheet transport failure in a relatively early stage.

Method used

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Examples

Experimental program
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examples

[0072]The disclosure will be described in detail using Examples and Comparative examples below.

example 19

[0079]A paper feed roller was obtained in a similar way to Example 2 except that the spherical segment-shaped protrusions illustrated in FIG. 7 were employed instead of the hemispherical protrusions. The upper bottoms of the spherical segment-shaped protrusions were set to be polished surfaces. The spherical segment-shaped protrusions were arranged on the circumferential surface of the elastic body layer in a spiral shape. In addition, the grooves that are continuous recesses were formed on the circumferential surface of the elastic body layer by rows of protrusions and rows of protrusions parallel thereto. The dimensions were set as follows.

[0080]Protrusion separation distance a: 0.3 mm

[0081]Width b of each groove: 1.0 mm

[0082]Arrangement angle θ of protrusions: 5°

example 20

[0083]A paper feed roller was obtained in a similar way to Example 2 except that the spherical segment-shaped protrusions illustrated in FIG. 6 were employed instead of the hemispherical protrusions. The upper bottoms of the spherical segment-shaped protrusions were set to be planes. The spherical segment-shaped protrusions were arranged on the circumferential surface of the elastic body layer in a spiral shape. In addition, the grooves that are continuous recesses were formed on the circumferential surface of the elastic body layer by rows of protrusions and rows of protrusions parallel thereto. The dimensions were set as follows.

[0084]Protrusion separation distance a: 0.3 mm

[0085]Width b of grooves: 1.0 mm

[0086]Arrangement angle θ of protrusions: 5°

[0087]Measurement of the amounts of paper powder generated and evaluation of durability were performed with respect to the paper feed rollers manufactured in Examples 19 and 20. The results are shown in Table 3 together with the configu...

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Abstract

A paper feed roller that can prevent paper sheet transport failure caused by accumulation of paper powder for a long period of time is provide. This paper feed roller includes a shaft body and an elastic body layer formed on the outer periphery of the shaft body. Unevenness are formed by protrusions on the circumferential surface of the elastic body layer. The protrusions are arranged on the circumferential surface of the elastic body layer in a direction different from an axial direction. The gap between a row of protrusions which extends in the direction different from the axial direction and a row of protrusions which is parallel to the row of protrusions is a continuous recess, i.e., a groove, and the width of the groove is greater than the distance between the protrusions in the row of protrusions which extends in the direction different from the axial direction.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation application of International Application number PCT / JP2018 / 028573, filed on Jul. 31, 2018, which claims the priority benefit of Japan Patent Application No. 2017-166590, filed on Aug. 31, 2017 and Japan Patent Application No. 2017-190262, filed on Sep. 29, 2017. The entirety of each of the above-mentioned patent applications is hereby incorporated by reference herein and made a part of this specification.BACKGROUNDTechnical Field[0002]The disclosure relates to a paper feed roller that is used in an exemplary embodiment in electrophotographic equipment that employs an electrophotographic method such as a copier, a printer, or a facsimile.Background Art[0003]A paper feed roller is formed in a cylindrical shape, for example, by an elastic material such as a rubber crosslinked body, and a circumferential surface thereof serves as a contact surface with paper sheets. Paper powder generated from the paper shee...

Claims

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Application Information

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IPC IPC(8): B65H5/06
CPCB65H5/06B65H2404/1118B65H2404/114B65H3/0638
InventorYAMAGUCHI, KAZUSHITAKASHIMA, MASAHIKOKOSE, TAKAHISAKAWANO, ATSUHIRO
OwnerSUMITOMO RIKO CO LTD