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US 6,109,518 AGranted
Heating-insulating cup and method of making same
AssigneeMichael Hoerauf Maschinenfabrik GmbH & Co. KG
InventorsBerthold Mueller, Gerhard Clauss
Life of this patent
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Abstract
A heat-insulating cup comprises an inner sleeve and an outer sleeve. The latter is supported against an upper and a lower area of the inner sleeve. An annular space is located between the inner sleeve and the outer sleeve, which annular space is free of any additional elements. A joint bottom is arranged to the inner sleeve and the outer sleeve. In the upper area, the inner sleeve has a sudden widening, on top of which the outer sleeve is disposed.
Claims29
A heat-insulating cup comprising:
- an inner sleeve,
- an outer sleeve, the outer sleeve being supported against an upper and a lower area of the inner sleeve, the outer sleeve otherwise surrounding an annular space around the inner sleeve, and
- a joint bottom arranged at the inner sleeve and the outer sleeve,
- wherein the inner sleeve has a sudden widening in the upper area, on which widening the outer sleeve is disposed.
1 more element
A method of making a heat-insulating cup, comprising:
- forming an inner tubular sleeve with outwardly tapering side walls extending from bottom end toward a top end, said top end including an outwardly protruding widening area,
- forming an outer tubular sleeve with outwardly tapering side walls extending from a bottom end toward a top end,
- applying said outer tubular sleeve by moving same upwardly around the inner sleeve,
- connecting a joint bottom to the inner and outer tubular sleeves, and
- connecting the top end of the inner sleeve to the top end of the outer sleeve along a portion of said widening area, thereby creating an annular insulating space below the widening area between the inner and outer sleeves.
2 more elements
Dependencies are inferred from the claim text.