Abstract: A one-piece carton construction used to mail and store checks includes a double front, bottom, back and top wall. A double side wall construction is hingedly connected to the front and rear walls by web corners adapted to be folded along a diagonal. Each side wall construction also has a tab which is frictionally locked against the bottom wall of the carton between the front and back walls to retain the double wall side walls and front, rear and bottom wall panels in a substantially rectangular parallelopiped configuration. Checks are placed within the rectangular parallelopiped enclosure and the top wall is folded downwardly about the back wall to form a cover for the carton. The top wall has a tuck flap hingedly connected to its front edge and a pair of rupturable panels connected to opposed side edges of the top wall. Each rupturable panel includes a tear strip bounded by cut score lines and a terminal adhesive panel.

Abstract: A dispensing carton particularly adapted for use with small candies includes a pair of parallel tubular compartments which are closed at one end, while the upper end of the carton includes a pair of independently operable sliding tabs which are disposed intermediate overlapping cover flaps. The upper closure of the carton includes two sets of registered openings, each set of openings registering with one of the compartments. Each sliding tab is hingedly connected to a pivotally connected top portion of an end wall. The sliding tabs may be individually moved to positions such that both compartments are open, or one compartment is open while the other compartment is closed, or where both compartments are closed.

Abstract: A carton erected from a one-piece paperboard carton blank permits a frozen pizza to be heated in a microwave oven while still in the carton. The carton has a bottom panel in contact with the pizza crust, the bottom panel having openings to permit venting of steam vapor during heating and the openings forming cross-straps to support the crust. The openings are sealed by a closure panel prior to heating and portions of the closure panel open like shutters on a window and are used, during heating, to support the carton above the oven shelf.

Abstract: A corrugated, one-piece, die-cut packing pad for insertion into opposite sides of a shipping carton for cushioning and supporting a device transported in the carton and spacing and precluding movement of the device relative to the sidewalls of the carton. The pad has a central, substantially solid front panel inserted between the transported device and a sidewall of the carton and a plurality of relatively pivotable, upright, hinged posts attached to opposite side edges of the front panel which when folded relative to each other in accordian style contact the sidewalls of the carton and serve to clamp the device between the front panels of the pads inserted between the opposite sidewalls of the carton and the device. A top panel is hinged to spaced portions of the top of the front panel and foldable 90.degree. relative thereto to overlie the device during shipment to provide cushioning for the top of the device during shipment.

Abstract: A two-piece paperboard carton including a tray portion having an open top for receiving a plurality of articles, such as cotton swabs. A rectangular cover sleeve is slid over the tray portion so as to retain the swabs within the tray. The sleeve includes a generally elliptically-shaped opening substantially closed by a transparent, plastic sheet which is spaced from opposite score lines of the sleeve and is perforated along a line or seam perpendicular to the adjacent score lines. In order to gain access to the cotton swabs and dispense the same from the tray, the film is separated into two halves along the perforated seam. Upon removal of a swab from the tray through the seam in the film, the film will return to its initial position to create a dust barrier for the swabs remaining in the tray.

Abstract: A one-piece tray is provided with corner ledges that serve as corner reinforcement bases when the trays are stacked one upon another. The side panels of the tray are provided with retaining lips extending from their top edges. The end panels are provided with tongues extending from the folded top edges thereof. The retaining lips and tongues serve to prevent lateral movement among the trays when stacked.

Abstract: A one-piece tray cover is provided with corner ledges that maintain the cover in an elevated position with respect to the top edges of a bottom tray on which the cover is positioned. The tray cover can also function as a supporting base for the tray bottom. When so used, the cover is inverted with its opening facing upward. The bottom tray is then placed inside the upward facing opening of the inverted tray cover. When used as a support base, the corner ledges serve to support the tray bottom in an elevated manner. The height of the corner ledges is less than the overall height of the tray cover. The corner ledges may be provided with a tapered edge resulting from a back-to-back fold along two non-parallel crease lines.

Abstract: An improved tray particularly suited for packaging food is formed by drawing a unitary blank of paperboard and includes an outwardly extending flange along the upper edge of the tray to provide a face to which a plastic cover sheet is bonded. Arcuately shaped troughs are formed in the face of the flange at each corner of the tray and a plastic cover sheet for enclosing the top of the tray, after the tray is filled with food, is ultrasonically bonded to the arcuately shaped troughs at each corner with matching sonic sealing heads. The sonically vibrating heads divert foods accidentally spilled into the troughs during the filling process from the troughs thereby improving the bond between the film and the plastic surface of the tray. Heat is applied to the cover sheet at the flange after ultrasonic bonding to assure complete sealing of the cover sheet to the flange.

Abstract: A carton, and a blank for forming the same, is disclosed which is adapted for storing and heating a food product such as a pizza. The carton includes a bottom wall defined by a bottom panel and closure panel, disposed in abutting and coplanar relationship. The bottom panel is provided with a plurality of venting apertures. In use, the closure panel is rotated away from the bottom panel such that a pair of elevator panels extend therebetween. The closure panel thereby defines a base for supporting the bottom panel in spaced relationship to the bottom of the oven. Further, the venting apertures are uncovered allowing moisture to escape from the carton while the pizza is being heated.

Abstract: A paperboard windowed carton to display the front area of its contents is formed from a one-piece carton blank. The carton comprises a front panel, a back panel, and two opposite side panels, with the front panel having a window preferably covered with a transparent film such as cellophane. Top panels form a hanging panel and the top enclosure for the carton and bottom panels form its bottom closure. The top panels include a rectangular top flap, a rectangular hanging panel having an orifice and three free sides, and four triangular panels which, in the erected carton, form sides for the hanging panel.

Abstract: This package is particularly adapted for carrying an article to display the latter at the point of sale. The package is formed from a unitary paperboard blank and includes product retaining openings along with integral product encircling portions to retain the product in the openings. The preferred embodiment of the package is adapted for use in carrying flashlights along with batteries carried separately by the package.

Abstract: A paperboard windowed carton to display the entire front area of its contents is formed from a one-piece carton blank. The carton comprises a front panel, a back panel, and two opposite side panels, with the front panel having a window preferably covered with a transparent film such as cellophane. Top panels form a top enclosure for the carton and bottom panels form an inverted platform within the carton. The bottom panels are a first and second inverting panel connected respectively to the front and back panels and adhered to their inside faces, and a first and a second platform panel each connected to a respective inverting panel.

Abstract: An automatic lock bottom carton with a pyramid closure is disclosed having two tabs extending from two panels that lock into corresponding openings on tabs of oppositely presented panels. The double lock prevents the collapsing of the pyramidal shape so that it can support a product in its intended form. The carton can be of single cell or multiple cell structure with one of the pyramid sides derived from the center divider.

Abstract: An envelope is provided, formed from a single sheet of paper material, which is substantially rectangular in configuration permitting processing on automatic equipment. The envelope is adapted for use with generally circular charts and includes a rectangular locking flap which in cooperation with the dimensions of the envelope minimizes the chance of slippage and damage to the charts.

Abstract: A composite tray is formed from top and bottom press formed tray members. The top tray member includes a base and sidewalls, and a plurality of embossments or raised surfaces are formed on the base thereof, while the bottom tray member also includes a base and sidewalls, with a plurality of debossments formed on the base thereof. The bottom tray member is of slightly larger dimensions than the top tray member such that the top tray member may be fitted within the bottom tray member and affixed thereto. The opposed bases of the top and bottom trays cooperate to inhibit unwanted twisting or flexing of the composite tray, thereby enhancing the structural rigidity of the tray. In a preferred embodiment of the subject invention, the bases in the top and bottom tray members are disposed in mirror image relationship to further rigidify the composite tray. Polymer coatings may be provided on the exposed surfaces of the composite tray to provide a moisture-liquid barrier.

Abstract: Disclosed is an improved process for extruding films of thermoplastic polyester film-forming materials. The process enables extrusion of films with reduced problems of neck-in, edge-weave and beading, by laminar flow feeding a small amount of a polymer into the extruder die in the area near both edges of the elongated die opening. The polymer laps said edge portions and thereby provides a controllable edge, which may be cut from the film after drawing the film from the die, and an increase in the usable film area for a given weight of polymer.

Abstract: A blank and a stackable carton produced from the blank and particularly suited for packing fresh fruits and vegetables includes a tray with a rectangular floor panel and vertical side walls. The side walls includes side cover flaps extending from fold lines defining the outer edges of the side walls. Pairs of side wall flaps are provided, each flap in each pair extending from a fold line defining an end of the side walls. A generally rectangular stacking panel is fitted into each end of the tray. Each stacking panel may include a pair of recesses at its lower edge which are aligned with openings in the rectangular floor panel of the tray. The trays can be vertically stacked with the openings in the floor of one tray aligned with tabs protruding from the upper surface of the lower tray.

Abstract: An expandable carton and a blank for forming same has top and bottom panels which are coupled by a self-locking expanding arrangement along three respective side edges of the top and bottom panels. At the fourth side edges of the top and bottom panels, closure flaps are hingedly coupled to close and lock the carton in its expanded or assembled configuration. This permits the carton to be shipped and stored in essentially flat, collapsed configuration, and then easily assembled and closed by simple manual operations without gluing. The carton may be opened by a tear strip arrangement to gain access to the carton interior.

Abstract: A multi-piece, tub shaped paperboard container having a circular opening in the top thereof is provided with a multi-piece, reinforced rim coated with a layer of meltable plastic and is assembled by appying heat to overlapping seams in order to melt the plastic coating and thereby seal the seams. Heat is applied evenly around the entire periphery of the rim by a 2-piece, annularly shaped, heated collar which may be selectively shifted into conforming engagement with the container. The even application of heat around the entire periphery of the rim equalizes the surface tension of the plastic coating during melting thereof to avoid deformation of the rim during the heat sealing process.