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Sheet feed roller and method of manufacturing the same

A paper feeding and elastic layer technology, which is applied to the electrical recording process using charge graphics, equipment for electrical recording technology using charge graphics, pile separation, etc., can solve the problem of higher maintenance costs and shorter replacement cycles for paper feeding rollers and other problems, to achieve the effect of lengthening the maintenance time, improving the conveying capacity, and improving the handling capacity

Inactive Publication Date: 2008-03-12
TOKAI RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the replacement cycle of the paper feed roller becomes shorter and the maintenance cost becomes higher.

Method used

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  • Sheet feed roller and method of manufacturing the same
  • Sheet feed roller and method of manufacturing the same
  • Sheet feed roller and method of manufacturing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1、2、2

[0041] [embodiment 1,2,2 ', 2 " and experimental example 1,2 and comparative example 1,2]

[0042] [Preparation of elastic layer forming material (uncrosslinked thermosetting polyurethane rubber)]

[0043] 70 parts by weight of polytetramethylene ether glycol (PTMG), polypropylene glycol (PPG) [Preminol S 3005 manufactured by Asahi Glass Co., Ltd. (monohydric alcohol content: 0.8% by weight, Mn: 5000, number of functional groups: 3, total unsaturated Degree: 0.0048meq / g)] 30 parts by weight, after vacuum defoaming and dehydration at 80°C for one hour, mix an appropriate amount of polyisocyanate [toluene diisocyanate (TDI)], and make it react at 80°C for three hours under a nitrogen atmosphere , to prepare a polyurethane prepolymer (NCO content: 3.0% by weight, NCO index: 105) having an NCO group at the terminal. And, after vacuum defoaming the polyurethane prepolymer at 90° C. for 30 minutes, 1.8 parts by weight of chain extender [1,4-butanediol (1,4-BD)], chain extender [tri...

Embodiment 3～6

[0053]In the adjustment of the forming material of the elastic layer in the above-mentioned Examples 1, 2, 2', 2" and Experimental Examples 1 and 2, the weight ratio (PTMG / PPG) of the mixed PTMG and PPG was obtained as shown in Table 3 below PPG), change the JIS-A hardness of the formed elastic layer in each example. Other than that, it is the same as the above-mentioned Example 1. In the following Table 3, this Example 1 is also shown together.

[0054] [existing example 1]

[0055] As a conventional example 1, a paper feed roller having an elastic layer made of polyurethane, a corrugated surface, and no grooves was used as a conventional product. The area of ​​the mountain portion of the crepe surface (S 1 ) and valley area (S 2 ) to the area ratio (S 1 / S 2 ), the height of the mountain-shaped portion, and the distance between the tops of adjacent mountain-shaped portions were measured in the same manner as above, and the results are shown in Tables 1 and 2 below.

[0...

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Abstract

A sheet feed roller, prolonging sustainability of sheet feeding capability in the presence of paper powders, comprises a hub, an elastic layer 2 provided on an outer peripheral surface of the hub and circumferentially-spaced axially-extending plural grooves 21 on the outer peripheral surface of the elastic layer. A textured surface comprising mountain and valley portions is formed on the outer peripheral surface of the elastic layer 2, this textured surface being on the wall and bottom surfaces of the grooves 21 as well as on the surface of the portions 22 between the grooves. A ratio of a total area of the bottom surfaces of the grooves to a total area of the outer peripheral surface of the elastic layer except for the grooves is 10 % to 20 %.

Description

technical field [0001] The present invention relates to paper feeding rollers such as paper feeding rollers and conveying rollers used in copiers, printers, facsimile machines and other equipment, and a manufacturing method thereof. Background technique [0002] Paper feed rollers used in copiers and the like are required to maintain a coefficient of friction over a long period of time. However, when paper is repeatedly fed, paper dust generated from the paper remains on the surface of the paper feed roller, thereby causing a decrease in the coefficient of friction, and there is a problem that the paper feed performance is degraded. [0003] Therefore, such a scheme has been proposed in the prior art, that is, as a paper feeding roller, grooves parallel to the axial direction are formed on the outer peripheral surface at predetermined intervals in the circumferential direction, or recesses and protrusions are formed by crepe formation. portion, thereby taking paper powder i...

Claims

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Application Information

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IPC IPC(8): B65H3/06B65H5/06B41J13/00G03G15/00H04N1/00B29C33/42B29C33/38B23H9/00B23H1/00
Inventor 白木庆太
Owner TOKAI RUBBER IND LTD
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