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| United States Patent |
6,417,481
|
|
Chen
, et al.
|
July 9, 2002
|
Method and a device for heating at least two elements by means of laser
beams of high energy density
Abstract
A process and a device for joining or separating various workpieces, in
particular made of plastic or plastic and other materials, by means of
curtain-like laser beams. To join workpieces in a particular joining area
of the contact surface, a mask, made of a laser-impermeable material, is
arranged between the laser source and the workpieces to be joined. The
laser beam and the mask are moved relative to each other. To generate high
energy density in the joining area, laser beams of at least two diode
lasers are brought together, and subsequently, differing laser line
lengths are generated by means of a zoom optics arrangement. Via a beam
splitter, a first laser beam aligned perpendicularly to the surface of the
mask, is joined by at least one secondary laser beam arranged
perpendicularly to the first laser beam, and the resulting laser beam is
directed onto the mask.
| Inventors:
|
Chen; Jie-Wei (Alpnach Dorf, CH);
Leister; Christiane (Stalden, CH)
|
| Assignee:
|
LEISTER Process Technologies (CH)
|
| Appl. No.:
|
746285 |
| Filed:
|
December 22, 2000 |
Foreign Application Priority Data
| Current U.S. Class: |
219/121.6; 219/121.64; 219/121.69 |
| Intern'l Class: |
B23K 026/06 |
| Field of Search: |
219/121.6,121.61,121.63,121.64-121.65,121.66,121.67,121.68,121.69-121.78,121.79
156/272.8
|
References Cited
U.S. Patent Documents
| 4335362 | Jun., 1982 | Salathe et al. | 148/DIG.
|
| 5676866 | Oct., 1997 | in den Baumen et al. | 219/121.
|
| 5793461 | Aug., 1998 | Inou | 349/153.
|
| 6031201 | Feb., 2000 | Amako et al. | 219/121.
|
| 6064034 | May., 2000 | Rieck | 219/121.
|
| Foreign Patent Documents |
| 0 835 715 | Apr., 1998 | EP.
| |
| 0 836 905 | Apr., 1998 | EP.
| |
| WO95/16570 | Jun., 1995 | WO.
| |
Primary Examiner: Elve; M. Alexandra
Assistant Examiner: Johnson; Jonathan
Attorney, Agent or Firm: Bachman & LaPointe, P.C.
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