Package for single film stack
AssigneeN.V. Optische Industrie "De Oude Delft"
InventorsHerbert Weindanz, Horst Auf dem Graben
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Abstract
A package which loads a stack of single films into an internally bladed daylight cassette, has a waisted middle part accommodating the stack, a strip for retaining the package in the cassette, a transverse weld following the retaining strip, a pull tab for pulling the package out of the cassette, a transverse weld in the pull tab and a pair of longitudinal welds in the upper and lower side of the pull tab with widened portions in the zone where the cassette blades enter, which welds continue to the transverse weld.
Claims12
In a package for loading a stack of individual rectangular films into a cassette which has an internal cutter for opening the package transversely to release the film stack within the cassette and at least one internal blade for cutting the package longitudinally to hold the film in the cassette as the opened package is extracted from the cassette, said package having:
- a retaining strip,
- a first transverse weld,
- a waisted middle part following the first transverse weld for accommodating the film stack,
- a pull tab having upper and lower sheets, adjoining and following the waisted middle part, and
- a second transverse weld in the pull tab;
- the improvement for use with a cassette having a pair of rollers for extracting the package from the cassette after it has been opened, comprising:
- at least one longitudinal weld connecting the upper and lower sheets of the pull tab in the zone of the pull tab which is pierced by the longitudinal blade,
- the longitudinal weld running at least as far as the second transverse weld, and
- the pull tab forming means drawn between the extraction rollers for extracting the package from the cassette.
Dependencies are inferred from the claim text.