Flexible bags – With stacking feature
Reexamination Certificate
2001-11-05
2002-10-29
Derakshani, Philippe (Department: 3754)
Flexible bags
With stacking feature
C383S119000, C206S509000
Reexamination Certificate
active
06471402
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to stackable containers and, more specifically, to a plastic bag having opposing mating rigid planar elements having impressed therein interlocking curvilinear grooves extending across said rigid element and terminating spaced away from the periphery edge of said rigid planar element.
2. Description of the Prior Art
There are other stackable elements designed for plastic bags. Typical of these is U.S. Pat. No. 1,710,386 issued to Taylor on Apr. 9, 1928.
Another patent was issued to Andrews on Feb. 7, 1933 as U.S. Pat. No. 1,896,601. Yet another U.S. Pat. No. 2,331,966 was issued to Eisgrau on Oct. 19, 1943 and still yet another was issued on Jun. 23, 1953 to Wilson as U.S. Pat. No. 2,643,048.
Another patent was issued to Vergobbi on May 18, 1954 as U.S. Pat. No. 2,678,768. Yet another U.S. Pat. No. 3,283,992 was issued to Hanson et al on Nov. 8, 1966. Another was issued to McFedries Jr. on Jan. 30, 1967 as U.S. Pat. No. 3,396,901 and still yet another was issued on Jul. 2, 1991 to Graham as U.S. Pat. No. 5,028,147.
Another patent was issued to Graham on Mar. 10, 1992 as U.S. Pat. No. 5,094,547. Yet another U.S. Pat. No. 5,520,010 was issued to Altman on May 28, 1996. Another was issued to Black on Apr. 7, 1998 as U.S. Pat. No. 5,735,423 and still yet another was issued on Jun. 9, 1998 to Goglio as U.S. Pat. No. 5,762,260.
U.S. Pat. No. 1,710,386
Inventor: H. F. Taylor
Issued: Apr. 23, 1929
The invention discloses a method for wrapping comestibles, such as fillets of fish, cuts of meat, dressed fish and the like in either their fresh or frozen state. The package prevents escape of liquids. The package is comprised of a rigid waterproof material and a waterproof wrapper enveloping said comestible and support.
U.S. Pat. No. 1,896,601
Inventor: O. B. Andrews
Issued: Feb. 7, 1933
The invention discloses a band for packing a loaf of sliced bread comprising a strip of flexible box board having a plurality of slots at one end thereof spaced to provide tongues therebetween, and a plurality of notches at the other end thereof adapted to adjustably engage said tongues, said band having perforations between said notches whereby the outer section may be torn off when not in use.
U.S. Pat. No. 2,331,966
Inventor: L. Eisgrau
Issued: Oct. 19, 1943
The invention discloses a type of folded paper bag that is reinforced so that it acts like a box when opened up. The bag is a bellows type of bag and two stiffening inserts within the bag attached to portions of the bellows one on each side of the bag, each insert being substantially as wide as the bellows when extended, each insert ends substantially one-half said width from the bottom edge of the bag when said bag is collapsed, the portions of the inserts at the other ends being bendable inwardly equal distances from the bottom of the bag, one of said last mentioned portions being substantially as long as the bag is wide when opened.
U.S. Pat. No. 2,643,048
Inventor: I. V. Wilson
Issued: Jun. 23, 1953
Containers fabricated from cellulosic material characterized by a slip resistant surface and having side walls and a top and bottom closure composed of an outer paper layer, said container having a discontinuous film of discrete particles of colloidal silica on the outer surface of said outer paper layer, said silica being present in amounts of 0.01 to 5% based on the weight of the outer paper layer.
U.S. Pat. No. 2,678,768
Inventor: Robert W. Vergobbi
Issued: May 18, 1954
The novel packaging is a reinforced bag comprising a bag of flexible, transparent material and a reinforcing structure within the bottom portion of the bag, said reinforcing structure comprising a bottom panel disposed within the bag and composed of a material substantially stiffer than the bag material and being adhesively secured to the bottom of the bag, said bottom panel having rounded corners and two integral side panels provided with relatively short, laterally extended flaps adjacent the lower portions of the side walls and curved to conform to the rounded corners of the bottom portion of the reinforcement, said integral side panels extending upwardly for a portion of the height of the bag along two opposed side walls, said side panels being substantially narrower than the side walls of the bag to which they are adjacent to permit the longitudinal corners of the bag to assume a rounded form corresponding to the rounded corners of the bottom panel when the bag is filled.
U.S. Pat. No. 3,283,992
Inventor: L. A. Hanson et al.
Issued: Nov. 8, 1966
The bag of the present invention is fabricated from a thin plastic film and having opposed top and bottom walls joined by side walls, the improvement which comprises a plurality of spaced apart first ridges formed in and constituting a part of each of said top and bottom walls of said bag, said first ridges opening inwardly of said bag, and a plurality of spaced-apart second ridges formed in and constituting a part of each of said top and bottom walls of said bag, said second ridges opening outwardly of said bag, said first and second ridges extending in at least two different directions in both said top and bottom walls of said bag, said ridges being adapted to interlock with and overlap similar ridges formed in another bag when said bags are in stacked relationship to resist sliding of said bags relative to each other.
U.S. Pat. No. 3,396,901
Inventor: R. McFedries, Jr.
Issued: Aug. 13, 1968
A synthetic, resinous package comprising at least a first panel and a second panel, the first and second panels being disposed in facing relationship, the first and second panels being joined in regions at least about three edge portions, the first and second panels defining inner faces and outer faces, the inner faces of the first and second panels comprising a non-blocking polyolefin resin selected from the group consisting of ethylene polymers, propylene polymers, and resinous copolymers of ethylene and propylene, the second or outer faces of the panels comprising a chlorinated olefin polymer having a slip angle of at least 50%, the slip angle being determined by stretching a sheet of material to be evaluated on a flat surface, securing the material to the surface, overwrapping a block weighing one pound and having a rectangular face measuring 2×2 inches with another portion of the material to be tested, placing the covered 2×2 inch surface of the block in engagement with a portion of the film secured to the flat surface subsequently raising one end of the flat surface to cause the surface of the block to assume an increase in angle of the flat surface to the horizontal when the block commences to slide or move.
U.S. Pat. No. 5,028,147
Inventor U.S. Pat. No.: 5,028,147
Issued: Jul. 2, 1991
The invention is an integrated container structure in which a sealable envelope of flexible material such as plastic, has disposed within it a carton of semi-rigid material which is bonded to the interior of the envelope at one or more places. The carton consists of a sheet of carton material having appropriate fold lines and configuration to be erected or collapsed into a generally flat structure within the envelope. The invention is particularly useful for the shipment of animal products containing bones and has the advantages that it can be stored in a flat configuration and easily erected into an upright carton within the envelope by simple manipulative procedures.
U.S. Pat. No. 5,094,547
Inventor: Mark S. Graham
Issued: Mar. 10, 1992
The invention is an integrated container structure in which a sealable envelope of flexible material such as plastic, has disposed within it a carton of semi-rigid material which is bonded to the interior of the envelope at one or more places. The carton consists of a sheet of carton material having appropriate fold lines and configuration to be erected or collapsed into a generally flat structure within the envelope. The invention is particularly useful for the shipment of animal products containing bones and has the
Derakshani Philippe
Kroll Michael I
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