Laser welding method

Details Laser welding method Laser welding method

2006-01-24

2006-01-24

Haran, John T. (Department: 1733)

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

C156S275100, C156S290000, C156S293000, C156S308400, C156S309600

Reexamination Certificate

active

06989070

ABSTRACT:
To weld a filter made of a laser beam-transmittable fiber material to a case made of a laser beam-nontransmittable resin material by a laser beam the filter is first placed on the case; subsequently, the filter is pressurized by a jig to increase the fiber density of a welding portion; and then the welding portion is irradiated by the laser beam. In the step of increasing the fiber density, a periphery of the welding portion is pressurized by the jig to increase the fiber density of the filter in a larger area than the welding portion. Accordingly, the laser beam transmitting through the filter melts a part of the case, and the melted resin material permeates through gaps between the fibers constituting the filter, thereby welding the welding portion to the case.

REFERENCES:
patent: 4636609 (1987-01-01), Nakamata
patent: 6427846 (2002-08-01), Graus et al.
patent: 6550914 (2003-04-01), Kopfer
patent: A 8-229312 (1996-09-01), None
patent: A 2000-186635 (2000-07-01), None
patent: A 2001-246488 (2001-09-01), None

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