Apparatus for repair of shatterproof glass

Plastic article or earthenware shaping or treating: apparatus – Product or preform repair or restoring means – Means feeding fluent stock under pressure

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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.

REFERENCES:
patent: 1926415 (1933-09-01), Wertz
patent: 2744290 (1956-05-01), Corson
patent: 2851760 (1958-09-01), Taylor
patent: 3012299 (1961-12-01), Dernaison
patent: 3178793 (1965-04-01), Rosengarten et al.
patent: 3458607 (1969-07-01), Sullivan et al.
patent: 3509597 (1970-05-01), Kirk
patent: 3571857 (1971-03-01), Rhyne
patent: 3914145 (1975-10-01), Forler et al.

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