Abstract: A process for manufacturing a multi-ply square bottom bag having a front wall, a back wall, a pair of gusseted side walls, each of which join to said front and back walls. There is also formed a gusseted square bottom panel having spaced but substantially parallel gusset edges and said bottom is joined to the front, back and side walls. The bag is produced by providing a web of inner ply material and a web of outer ply material, adhesively joining said webs into a composite and forming said bag from said joined webs. The improvement relates to forming a first flap in the inner web by cutting the web so as to form a plurality of free edges and a hinge line for said flap. The hinge line is connected to the free edges so that the free edges and hinge line define the flap. Thereafter joining the inner and outer webs to form the composite web.

Abstract: A multi-ply square bottom bag having a front wall, a back wall, a pair of gusseted side walls, each joining a front and a back panel, and a folded and gusseted bottom panel defining a pair of interior spaced gusset edges extending between the front and back panels with the edges being substantially parallel to each other and the bottom panel joining the front, back and side panels. The multi-ply bag has an inner ply and an outer ply. The inner ply defines a first flap adapted to be positioned to engage said bottom panel and overlie at least a first portion of said gusset edges.

Abstract: There is disclosed herein a bag having front, back, gusseted side and bottom panels which includes an internal flap to cover the bag bottom, which flap is hingedly secured to one of front or back walls and adhesively secured to said bottom. The flap is movable with the bag from a folded position with the bottom lying against the back wall to an open position where the bag bottom is normal to the other walls and can be positioned flat with the flap drawn over the bottom.

Abstract: There is disclosed herein a method for manufacturing a bag-in-a-bag system wherein there is provided a content-carrying sealed and opaque inner bag and a windowed outer bag having a layer in the window-forming graphic content replicating indicia. The graphic layer indicia is of a high quality and is prepared by a high resolution printing technique where the minimum resolution is defined as 160-200 line screen. This type of resolution can be achieved using a rotogravure process. For ease in manufacturing, several indicia are printed on a web, which is then longitudinally slit to separate the indicia and then cut transversely into patches for application to the bag. The bag itself may be printed using a lower resolution technique such as rubber plate printing.

Abstract: A bag for carrying and exposing a food item, usually of the hamburger-type sold at fast-food or convenience stores. The bag includes front, back and gusseted side panels which are interconnected and form a V-shaped closed end and an open end. A pair of lines of weakness or perforations are provided in the bag, one along the junction of each side panel and the front panel and extending between the open and closed ends. A pair of slits, one member associated with each line of perforation and extending from the bag open end to the respective perforation line. A second set of slits can be provided at open end of each of the non-perforated side panel/back panel junctions can be provided. The bag having a width or the distance between the lines of perforations being substantially equal to the width of the front panel. Thus the bag can be opened by tearing along the perforations so as to expose the bag interior and an item therein for removal, application of condiments, and/or reuse of the bag.

Abstract: There is disclosed herein a bag-in-a-bag system wherein the outer bag is windowed and content indicia is displayed in the window. In this system high resolution graphic indicia is provided for the content indicia and low resolution indicia, usually text, is provided on the bag. Furthermore, the graphic indicia is applied to a patch which underlays the window but is larger than the window and smaller than the window-carrying panel, usually the front panel. Furthermore, a protective adhesive liner is applied to the front panel and secures the patch in place. This layer is of a size larger than the patch and a out the size of the inside of the front panel. A method for making this bag-in-a-bag system is also disclosed.

Abstract: In a popcorn package for microwave popping, the subsequent popping of popcorn by microwave energy is enhanced by the use of a layer of metallized ink printed on the bag of a popcorn package. The metallized ink contains powdered aluminum and is of a commercial grade but diluted to provide an opacity level of light transmission in the range of 47% to 10%, such layer lying below the charge of popcorn and shortening during popping. The material of the bag comprises a pair of plies with the layer of metallized ink being printed to one of the plies and disposed between the plies of the bag.

Abstract: There is disclosed herein a flexible bag in which the back panel is defined by inner and outer overlapping sections that overlap to form a back seam. The outer section defines a removable section which has a first perforation generally parallel to the back seam and an edge that is generally parallel to the bag bottom and intersects the first perforation. Alternatively, a second perforation may be provided along the edge. The outer panel is about as wide as the bag and the removable section is less than one-half the width of the outer panel. The first perforation is positioned between the back seam and side edge of the removable section. The first perforation may be adjacent the back seam and the second perforation is adjacent the bag bottom.A blank for forming said bag from a web is also disclosed.

Abstract: There is disclosed herein a window-style bag which includes a removable coupon overlying and a transparent window-forming area where the consumer may view the contents of the bag. The coupon section overlies the transparent window-forming film and the bag aperture which forms the window. The coupon is intended for removal, and when so removed, the window viewing area is opened or enlarged, and the bag's structural integrity is substantially unaffected. In practice, the viewing section may be polygonal but is usually rectangular, but the coupon may be secured along two, three or four sides to the bag.

Abstract: There is disclosed herein a bag which is constructed to form a primary loading compartment and an auxiliary load-carrying or promotional-item-carrying pocket. The bag includes front, back, side and bottom panels and a compartment forming partition panel. The partition panel is secured to the front panel so as to define primary and auxiliary load-carrying compartments. The auxiliary compartment is formed by the front panel and partition panel. The front panel may be apertured and overlaid with a transparent film so as to form a window. The partition is adhered to the front panel so as to form a pocket in which the contents are positioned for viewing through the window.

Abstract: A paper bag having a barrier material and a method of coating paper for use in making such a paper bag. The inventive method comprises of the steps of: continuously removing in a direction of travel a strip of paper from a source of paper at a predetermined speed; masking with a liquid impervious mask at least one longitudinal portion of the strip of paper in the direction of travel; routing the strip of paper and the mask through a bath of liquid barrier material, the liquid barrier material substantially saturating the strip of paper except for the masked portion; removing the mask from the strip of paper after moving it out of the liquid barrier material; and forming a selected length of the strip of paper into the bag. The paper bag has at least a front side and a back side each having at least one longitudinal portion extending the length of the bag. The longitudinal portion has a width less than the width of the front and back sides.

Abstract: A paper bag having a barrier material and a method of coating paper for use in making such a paper bag. The method comprises the steps of: continuously removing in a direction of travel a strip of paper from a source of paper at a predetermined speed; masking with a liquid impervious mask at least one longitudinal portion of the strip of paper in the direction of travel; routing the strip of paper and the mask through a bath of liquid barrier material, the liquid barrier material substantially saturating the strip of paper except for the masked portion; removing the mask from the strip of paper after moving it out of the liquid barrier material; and forming a selected length of the strip of paper into the bag. The paper bag has at least a front side and a back side each having at least one longitudinal portion extending the length of the bag. The longitudinal portion has a width less than the width of the front and back sides.

Abstract: In making a tubular bag, a first band of thermosetting glue is printed across the length of a web, and a second and third band of such glue is printed on the opposite side of the web in registry with the ends of the first band. The printed glue is then dried with a heat below that of the softening temperature of the thermosetting glue. Glue is applied to a marginal edge of the web and the marginal edges are overlapped and thus glued together as a back seam. An increment of the tube is severed at said bands without heating such bands, and the web is folded along a line extending centrally through the glue bands. The bands are simultaneously clamped together and heated to fuse the bag layers together at the bands.

Abstract: A tubular web has a bottom which is tightly sealed to enable pressurizing of the bag, the bottom including a first band of thermosetting glue imprinted across the length of the web at the interior of the tube. A second band and a third band of thermosetting glue are imprinted on the tube at the exterior thereof in registry with the ends of the first band and jointly extend across a rear panel. The tube has a turned up bottom defined by a fold along a line extending centrally along the imprinted bands, each portion of the thermosetting glue bands being thermally fused only to other portions of such bands in contact therewith. In one embodiment, there is a second fold along a second line spaced from the turned up bottom which defines an area between the second line and the turned up bottom, such area being joined by glue to the back panel.

Abstract: A bag has an opening on its front side adjacent to its mouth which exposes the inner surface of the rear side, there being a first cohesive coating on such inner surface in registration with the opening, their being a second cohesive coating on the front side adjacent to the opening. After the contents have been placed in the bag, the end of the bag is folded over between the cohesive coatings so that they register with each other, and by their nature they adhere to each other in response to being pressed together.

Abstract: A header bag is made from a web of flexible thermoplastic sheet having a prospective header portion which comprises a selected number of folds of the plastic sheet that are heat-laminated together, the header portion having a heat-embossed stiffening pattern thereon.

Abstract: A paper bag has a conventional rectangular bottom and has its side panels so cut and scored at the other end as to define four end panels arranged to provide a reclosable rectangular end at the mouth of the bag.