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US 4,550,238 AGranted
Apparatus and method for sealing capsules
AssigneeWarner-Lambert Company
InventorsLouis Van Herle, Fritz Wittwer
Life of this patent
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Abstract
Apparatus using a coherent mono-chromatic radiation source, preferably using a laser, for bonding capsule elements is disclosed. The systems described include means for providing a spot, short-line, or continuous seam. Also described are methods to enhance the bonding technique which utilize a small quantity of water or plasticol in the region to be bonded.
Claims30
An apparatus for bonding hydrophilic polymer capsule elements which comprises
- a source of coherent monochromatic radiation,
- an assembled hydrophilic polymer capsule,
- means to support said capsule,
- means to direct a beam of said radiation at adjacent portions of said elements, and
- means to control the amount of raidant energy absorbed by said portion of said elements,
- whereby said adjacent portions are bonded.
3 more elements
A method of bonding hydrophilic elements which comprises fusing ajacent portions of said elements with a laser beam.
Dependencies are inferred from the claim text.