NTRS - NASA Technical Reports Server

Advisory – Planned Maintenance: On Monday, July 15 at 9 PM Eastern the STI Compliance and Distribution Services will be performing planned maintenance on the STI Repository (NTRS) for approximately one hour. During this time users will not be able to access the STI Repository (NTRS).

Back to Results
Automatic Inspection Of Heat Seals Between Plastic SheetsAutomatic inspection apparatus detects flaws in heat seals between films of polyethylene or other thermoplastic material. Heat-sealed strip in multilayer plastic sheet continuously moved lengthwise over illuminators. Variations in light transmitted through sheet interpreted to find flaws in heat seal. Site of flaw marked to facilitate subsequent manual inspection. Heat sealing used to join plastic films in manufacturing of variety of products, including inflatable toys and balloons carrying scientific instruments to high altitudes.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Rai, Kula R.
(Winzen International, Inc.)
Lew, Thomas M.
(Winzen International, Inc.)
Sinclair, Robert B.
(Winzen International, Inc.)
Date Acquired
August 17, 2013
Publication Date
January 1, 1995
Publication Information
Publication: NASA Tech Briefs
Volume: 19
Issue: 1
ISSN: 0145-319X
Subject Category
Fabrication Technology
Report/Patent Number
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.

Available Downloads

There are no available downloads for this record.
No Preview Available