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US 4,528,150 AGranted
Methods and apparatus for sealing articles
AssigneeNorthern Telecom Limited
InventorsLeonard J. Charlebois, Renato Mariani, Fred A. Huszarik
Life of this patent
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Abstract
A method of sealing an article by heating solid plastic material in a chamber into a flowable state and then forcing the material from the chamber into a reservoir in a manually portable device. While in the reservoir, the material is maintained homogeneously molten and flowable and the material is forced from the reservoir into a mould cavity at a sufficiently fast rate to fill the cavity before flow passages into the cavity become blocked with hardening material.
Claims4
A method of sealing an article comprising:
- heating plastic material in a chamber to melt the plastic and render it flowable and homogeneous;
- forcing the molten flowable material from an outlet of the chamber and through an inlet of a reservoir defined within a manually portable accumulator;
- maintaining the plastic material homogeneous and at a molten flowable temperature while held in the reservoir;
- disposing the reservoir in communication with a mould cavity partly defined by the article to be sealed;
- and
- forcing the molten flowable material from the reservoir into the mould cavity at a sufficiently fast rate to fill the cavity before flow passages into the cavity become blocked with hardening material.
3 more elements
Dependencies are inferred from the claim text.