Class 470/162 - APPARATUS FOR MAKING WASHER

Subclass of Class 470 - Threaded, headed fastener, or washer making: process and apparatus
Definition: Subject matter for apparatus for manufacturing a article
No. of patents: 3
Last issue date: 02/19/2008

Number	Title	Issue Date
7331874	Method for producing circular washer Circular washers are formed by the following steps: at least two through holes are provided in the middle of a belt of material, which are also used for positioning and advancing the belt; a residual slot is formed between every two adjacent through holes, thereby f...	02/19/2008
4949614	Punch and die set A manually operated punch and die set for making washers accurately includes a die having a series of die openings graduated according to diameter, a series of punches having cutting faces complementary to and received in the die openings for manually sev...	08/21/1990
3944228	Curling stone washer and handle assembly A curling stone handle of one piece construction contoured to conform with the contour of the face of existing curling stones combined with a ribbed washer of plastic oriented interiorly of the cupped area only in the curling stone and a bolt extending th...	03/16/1976

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