Envelopes – wrappers – and paperboard boxes – Wrapper – Including means to facilitate severing the wrapper
Patent
1991-06-26
1993-02-09
Shoap, Allan N.
Envelopes, wrappers, and paperboard boxes
Wrapper
Including means to facilitate severing the wrapper
229237, 220461, 2065242, B65D 7520
Patent
active
051847710
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention concerns a package for piece goods, which comprises an envelope formed by an areal, foldable and multilayer wrap of which two strip-like edge zones are connected together by sealing, preferably cold-sealing, a connection area to form the envelope, a strip-shaped tear-open region of the envelope starting at one of the two strip-like edge zones to which it extends substantially perpendicularly.
STATE OF THE ART
A package of this kind is known from the published PCT application WO 80/02827 (Application No. PCT/AT80/00017) filed by applicant. In this known package--which advantageously consists of a two-layer wrap material and which is more or less in the form of a tubular pouch, the side edges of the tear-open region are formed by weakening lines present in the wrap material and along which the material tears when the package is opened. The beginning of the strip-like tear-open accessory is located in a doubling zone of the package, and as regards a tubular pouch therefore for instance at one of its flipper-shaped sealing spots. Because of the weakening lines introduced in special manner in the said doubling zone of the package, it can be torn open in problem-free manner while retaining its hermeticity. On the other hand the manufacture of packages containing weakening lines is comparatively expensive.
DESCRIPTION OF THE INVENTION
Hence it is the object of the invention to create a package of the initially cited kind where the wrap material used in making the package evinces little or no weakening lines and allows problem-free opening by removing a strip-like tear-open region.
The basic problem of the invention is solved by the package of the invention which is characterized in that the wrap material consists of several layers which are selected from the series: paper, unstretched polyolefin foil or layer, aluminum foil, biaxially stretched polypropylene, biaxially stretched polyamide foil, biaxially stretched polyethylene-terephthalate foil, and a sub-assembly of two or three layers possibly consisting of the above materials, where, in all adjacent different layers in the wrap material the one cited earlier in the series, and as regards adjacent layers of the same or similar material, the particular thinner one always is closer to the packaged good, and where the sub-assembly is such that bonding is present between its layers which is stronger than that existing between the sub-assembly and the other layers of the wrap material, and in that the wrap material comprises notchings or linear perforations and possibly weakening lines only inside the strip-like edge zone along the two side boundaries of the tear-open region but no weakening line or weaker material outside this edge zone, and in that a grip tap is present at the beginning of the tear-open region, consisting of same material as the package in the edge zones and being located between the notchings or linear perforations. Regarding packaging including a sub-assembly, advantageously the bonding between the individual layers of the sub-assembly evince peel-strengths 50% at least, preferably at least 70% more than those of the bonding between the sub-assembly and the other layers of the package.
Now applicant discovered in surprising manner that precisely as regards the above cited material combinations in the package, when removing the tear-open region of the package, starting from the ends of the notchings or linear perforations, the package will tear even in the absence of weakening lines along more or less parallel lines, that is, along the conceptual side edges of the tear-open region.
In an advantageous embodiment of the package of the invention, the notchings or linear perforations go as far at least as the connection area or into it.
In an advantageous embodiment of the invention, same is characterized in that the beginning of the tear-open region between the connection area and the free edge of one of the package edge zones shall form the grip tab.
In another advantageous embodiment of the invention, the pack
REFERENCES:
patent: 3109577 (1963-11-01), Knipp
patent: 3111255 (1963-11-01), Skowronski
patent: 3405861 (1968-10-01), Bush
patent: 3498448 (1970-03-01), Kuster
patent: 3623653 (1971-11-01), Work
patent: 4030662 (1977-06-01), Gess
patent: 4209126 (1980-06-01), Elias
patent: 4589145 (1986-05-01), Van Erden et al.
patent: 4657142 (1987-04-01), Mizoguchi et al.
patent: 4658963 (1987-04-01), Jud
patent: 4726473 (1988-02-01), Sato et al.
patent: 4811848 (1989-03-01), Jud
patent: 4826011 (1989-05-01), Jud
patent: 4955479 (1990-09-01), Beer et al.
Jud Wilfried
Neiderer Andreas
Reiterer Franz
McDonald Christopher J.
Shoap Allan N.
Teich Aktiengesellschaft
LandOfFree
Packaging for piece goods does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Packaging for piece goods, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Packaging for piece goods will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-322151