Plastic article or earthenware shaping or treating: apparatus – Product or preform repair or restoring means – Means feeding fluent stock under pressure
Patent
1977-01-18
1977-09-13
Flint, Jr., J. Howard
Plastic article or earthenware shaping or treating: apparatus
Product or preform repair or restoring means
Means feeding fluent stock under pressure
425 12, 425405R, 264 36, 156 94, B29C 1100
Patent
active
040478637
ABSTRACT:
In the repair of damaged shatterproof glass by the introduction of a polymerizable liquid into a conical crack a vacuum is intermittently released and reapplied to the damaged area by means of a vacuum chamber connected to a vacuum pump through a line having an opening to the atmosphere which opening is adapted to be rapidly opened and closed by an operator's finger. The opening is threaded to receive a removable needle valve for accurate vacuum control. The vacuum chamber has a transparent end wall for viewing the work and a translucent cylindrical side wall allowing external light to illuminate the work without glare. A flexible seal in the end wall of the vacuum chamber allows a probe to be operated while the vacuum is applied. A plunger-sleeve combination, extending through the end wall is used to apply pressure to the liquid without releasing the vacuum.
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Kelchner Harley E.
McCluskey Douglas
Flint, Jr. J. Howard
Glass Medic, Inc.
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