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US 4,169,493 AGranted
Flexible hot water bottle
OwnerJoseph Segalowiczinventor
Life of this patent
Estimating the term…
Abstract
A hot water bottle having an internally threaded neck. The threaded neck is formed as an insert and the bottle is formed by blow moulding around the insert. The insert is preferably of material which will melt superficially during moulding to become welded to the actual neck of the bottle.
Claims2
A flexible hot water bottle having the shape of a flat sack comprising:
- an internally threaded neck portion formed by an insert of plastics material having a periphery subjected to superficial fusion;
- and
- a sack portion having a first portion fused to and extending above the periphery of said insert and a second portion integral with and extending below the periphery of said insert to form a sack, the sack having an external peripheral bead extending there around, the peripheral bead being formed by pinching together walls of a parison used to form the sack.
Dependencies are inferred from the claim text.