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US 4,144,631 AGranted
Method and apparatus for fitting heat shrinkable film seals to necks of vessels
OwnerMasaaki Fujioinventor
Life of this patent
Estimating the term…
Abstract
A heat shrinkable film is opened up from a collapsed state by suckers and is stretched over several guide members which are then clamped over the neck of a vessel. The film is pushed off the guide members onto the neck of the vessel and is clamped there by clamp members while the guides are withdrawn.
Claims12
A method for putting a tube of heat shrinkable film on over the neck of a vessel, comprising:
- (a) inserting the operative ends of a plurality of guides into the tube of film, the guides having a mutual configuration which defines a substantially tubular inside space and a substantially tubular outside surface and being movable substantially radially with respect to one another so as to widen or narrow the inside space and the outside surface;
- (b) spreading out the film tube by moving the guides apart so as to widen the outside surface defined by them;
- (c) inserting the neck of the vessel into the inside space defined between the guides past their operative ends;
- (d) slightly bringing together the guides so as to grip the neck of the vessel between their operative ends;
- (e) pushing the tube of film along the guides and over the neck of the vessel;
- and
- (f) releasing the grip of the operative ends of the guides on the neck of the vessel and removing them from it, leaving the tube of film on the neck.
4 more elements
Apparatus for putting a tube of heat shrinkable film on over the neck of a vessel, comprising
- a plurality of guides which have a mutual configuration which defines a substantially tubular inside space and a substantially tubular outside surface,
- and which are movable substantially radially with respect to one another so as to widen or narrow the inside space and the outside surface,
- and which have free operative ends adapted for gripping the neck of a vessel between them,
- and which have an outer surface adapted for guiding the tube of film over the guides onto the neck of the vessel.
1 more element
Dependencies are inferred from the claim text.