Plastic article or earthenware shaping or treating: apparatus – Stock pressurizing means operably associated with downstream...
Patent
1987-03-11
1988-07-05
Hoag, Willard
Plastic article or earthenware shaping or treating: apparatus
Stock pressurizing means operably associated with downstream...
52743, 141392, 425463, 425464, 425466, 425467, 425DIG227, B29C 4736
Patent
active
047551305
ABSTRACT:
A fixing in a wall is made by drilling a hole, inserting the pin of a nozzle mounted on a hot melt gun into the hole and injecting molten polypropylene into the space between the pin and the hole. The polypropylene is allowed to solidify and the nozzle is removed leaving a wall plug ready for the insertion of a screw. Three embodiments of a nozzle especially adapted for use in this process are described. nozzle has a hollow screw-threaded base with a pin extending forwardly therefrom. Passageways in the base each communicate at one end with the interior of the base and at another end externally of the base and the pin in the vicinity of the junction between the pin and the base. A flexible seal is slidably mounted on the base and resiliently biased towards the pin.
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Bartlett Edward D. C.
Black & Decker Inc.
Hoag Willard
Murphy Edward D.
Weinstein Harold
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