Title:
WASHER PRODUCTION METHOD AND WASHER
Document Type and Number:
WIPO Patent Application WO/2017/069229
Kind Code:
A1
Abstract:
Provided is a washer production method that enables improving material yield rate. This method comprises: a preparation step for preparing a long member N1 provided with upper-side ridges 20 and lower-side ridges 40 that are formed in the upper-side surface and/or the lower-side surface, and provided with upper-side troughs 30 and lower-side troughs 50 that are formed continuously leftward and rightward to the upper-side ridges 20 and the lower-side ridges 40, wherein protrusions 33, 53 are formed in the upper-side troughs 30 and the lower-side troughs 50; and a transformation step for deforming the long member N1 such that the upper-side surface and the lower-side surface have a circular-arc shape as viewed from an anterior direction thereof.
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Inventors:
OCHIAI HIROKAZU (JP)
Application Number:
PCT/JP2016/081228
Publication Date:
April 27, 2017
Filing Date:
October 21, 2016
Export Citation:
Assignee:
TAIHO KOGYO CO LTD (JP)
International Classes:
B21D53/20; B21D11/20; F16C17/04; F16C33/14
Foreign References:
| JPS51141767A | 1976-12-06 | |||
| JP2015117817A | 2015-06-25 | |||
| JPS4967301A | 1974-06-29 | |||
| JPS5391063A | 1978-08-10 |
Other References:
See also references of EP 3366382A4
Attorney, Agent or Firm:
NAGATA Toyohiko et al. (JP)
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