Method of producing an outer blade for a hair cutting device

Patent metadata

Field	Value
Publication number	US-10836058-B2
Application number	US-201815889874-A
Country	US
Kind code	B2
Filing date	Feb 6, 2018
Priority date	Feb 24, 2017
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

Provided is a method of producing an outer blade for a hair cutting device from a material including bars that each have a shape of a rectangular stick and are arranged at predetermined intervals. The material is placed on a base. Next, a first tool having a leading end that has a gradually increasing width in a direction away from the material is used to press at least one part of each of the bars in a direction from a counter base-side first face of each of the bars toward a base-side second face of each of the bars. An edge of the first face of each of the bars is caused to project widthwise and to move toward the second face to be farther from an intermediate part of the first face.

First claim

What is claimed is:

1. A method of producing an outer blade for a hair cutting device, the method comprising:
placing a material on a base, the material including a plurality of bars arranged at predetermined intervals; and
pressing, using a first tool having a plurality of leading ends each corresponding to a respective one of the bars and each of the leading ends having a gradually increasing width in a direction away from the material, at least one part of each of the bars in a direction from a counter base-side first face of each of the bars toward a base-side second face of each of the bars to cause an edge of the first face of each of the bars to project widthwise and to move toward the second face to be farther from an intermediate part of the first face.

2. The method according to claim 1 , wherein, when the material is placed on the base, the bars are partly fitted, along a thickness direction extending from the first face to the second face, in respective grooves that are provided in the base and are spaced correspondingly to respective ones of the bars.

3. The method according to claim 1 , further comprising pressing, using a second tool having a leading end that differs in shape from the leading end of the first tool, the at least one part of the bar that has been pressed by the first tool.

4. The method according to claim 1 , wherein pressing, using the first tool, comprises pressing the leading ends of the first tool on respective ones of the bars obliquely to the first face.

5. The method according to claim 4 , further comprising:
changing an angle of pressing of the first tool, the angle being relative to the first face; and
pressing the leading ends of the first tool on respective ones of the bars at the changed angle.

6. The method according to claim 1 , wherein pressing, using the first tool, includes pressing the at least one part of each of the bars using the leading ends of the first tool, and the method further comprises:
after pressing the bars using the first tool, shifting positions of each of the bars and the first tool relative to each other in a widthwise direction of the bars; and
pressing a different portion of each of the bars using the leading ends of the first tool.

7. The method according to claim 1 , further comprising reducing a width of the first face widthwise of each of the bars as compared with a corresponding width of the second face before each of the bars is pressed using the first tool.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Omori Masato
• Higuchi Katsuhiro
• Naoe Hiroyuki
• Yamada Koji
• Shimizu Hiroaki
• Okura Shoki

Classifications

• B26B19/042

  Long hair cutters or older types comprising a cutting grid · CPC title

• B26B19/143

  Details of outer cutters · CPC title

• B26B19/384

  Dry-shaver foils; Manufacture thereof · CPC title

• B26B19/3846

  Blades; Cutters (B26B19/044, B26B19/141 take precedence) · CPC title

• B26B19/3893 Primary

  Manufacturing of shavers or clippers or components thereof · CPC title