Photon welding devices for joining plastic parts

Details Photon welding devices for joining plastic parts Photon welding devices for joining plastic parts

2005-06-28

2005-06-28

Haran, John T. (Department: 1733)

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

C156S379800, C156S580000, C219S243000, C219S385000

Reexamination Certificate

active

06911108

ABSTRACT:
Photon welding devices of this invention comprise a non-coherent photon source, and a light pipe coupled to the photon source at one end. A thin mask is positioned at another end of the light pipe that defines a weld location for photon delivery. A work piece to be bonded by the device comprises a top layer of transparent plastic and a base layer of absorbing plastic. The thin mask is in the form of a reflective coating positioned on the end of the light pipe over all surfaces that are not in contact with the work piece. A device includes a member that imposes a controlled, compressive force to the work piece while it is being welded and during a short time thereafter. The device also includes a member that maintains a desired alignment of the light pipe, top layer of the work piece, and base layer of the work piece during the bonding cycle.

REFERENCES:
patent: 4233493 (1980-11-01), Nath
patent: 4636609 (1987-01-01), Nakamata
patent: 5278731 (1994-01-01), Davenport et al.
patent: 5426308 (1995-06-01), Sudduth et al.
patent: 5840147 (1998-11-01), Grimm
patent: 5843265 (1998-12-01), Grimm
patent: 6596122 (2003-07-01), Savitski et al.

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