APPARATUS AND METHOD FOR MANUFACTURING CAN LID

Title:

APPARATUS AND METHOD FOR MANUFACTURING CAN LID

Document Type and Number:

Japanese Patent JP2012091868

Kind Code:

A

Abstract:

To provide an improved method for manufacturing can lids as well as a suitable apparatus for performing the method.

In a method for forming tear notches in can lids, the can lid is subjected in a press tool 10 to a laser engraving during which the desired tear notch is formed. A laser ablation process is preferably performed, with the press tool 10 closed, within a time period of less than 30 ms. During this time, the focal spot 27 of a laser beam 26 is moved over the whole desired contour of the tear notch 22 so that an uninterrupted groove-like cavity is formed. With the use of laser engraving in the press tool 10, the mechanical wear of the press tool 10 and of press molds can be minimized and the tool operating life can be increased. In particular, the manufacture of can lids with consistently high quality is ensured.

Inventors:

BLEI KLAUS
ROEVER MARKUS

Application Number:

JP2011219921A

Publication Date:

May 17, 2012

Filing Date:

October 04, 2011

Export Citation:

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Assignee:

SCHULER PRESSEN GMBH

International Classes:

B65D17/30; B65D17/32

Domestic Patent References:

JP2001063731A	2001-03-13
JP2002515344A	2002-05-28
JPH06304799A	1994-11-01
JP2010149929A	2010-07-08
JPH11115936A	1999-04-27
JPH04251625A	1992-09-08
JPS61232152A	1986-10-16
JPS5877532A	1983-05-10
JP2004231262A	2004-08-19

Foreign References:

US6775888B1

2004-08-17

Attorney, Agent or Firm:

Atsushi Nakajima
Kato Kazunori
Katsuichi Nishimoto

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