Diamond International Corporation

Packaging Corporation of America

Henry A Lord

Richard F Reifers

Kenneth D Bixler

Robert E Ralphs

Donald C McCann

A molded carton is provided having a lock system for retaining a cover section in an overlying closed relation with the open top of a base section. The lock system includes a hinged flange mounted on a front segment of the base sections defining the open top. The flange is mounted for limited inward pivotal movement from a normal upright position wherein the flange projects generally upwardly from the front of the base section. The flange is provided with a predetermined number of outwardly projecting protrusions which, when the cover section is in closed position, interlockingly engage a corresponding number of apertures formed in the front wall of the cover section.

Upwardly molded locking flange on carton

Multi-row, windowed, molded egg cartons each have a relatively shallow cover hinged to a relatively deep tray wherein the cover is provided with a channeled formation in the cover which is reinforced by six ribs and wherein the hinge line between the cover and tray is so located that when the carton is open the top of the cover and the bottom of the tray are in the same plane and the top of the tray is in a plane above bottom of the cover and the cells in the tray each have square bottoms with the sides of the squares arranged at an angle of 45.degree. to the sides of the carton.

Multi-row egg cartons

A new and improved molded egg cell construction wherein the molded egg cell includes a cushion or pillopad on an up-post side wall of the cell which projects inwardly, a thin area formed on the outside of the cell adjacent its bottom which is square, the sides of which are oriented at 45.degree. to the sides and ends of the egg carton incorporating the cell, and in which the bottom is planar on its interior surface but formed with thin areas on the exterior of the bottom, in between which, is a footed formation.

Construction of universal egg cell cushion

Egg carton

An egg cell base is provided to create softened areas of egg contact. The base has a center area which creates a softened cushion for egg contact and also creates a gap to shield the eggs from contact with the surface upon which the egg carton rests. Internally, the bottom is provided with a crater construction which helps distribute contact over a larger shell area, and also helps locate and hold the egg tip in place. Surrounding the central area are foot areas of greater thickness which provide strength for stacking. The ring cushion also is capable of providing an accordian motion upward to accommodate high eggs that may bulge the cover of the carton stacked therebelow during shipment.

Egg cell construction

A new and improved molded egg cell construction and method for its manufacture, wherein the molded egg cell includes a cushion or pillopad on an up-post side wall of the cell which projects inwardly, a thin area formed on the outside of the cell adjacent its bottom which is square, the sides of which are oriented at 45.degree. to the sides and ends of the egg carton incorporating the cell, and in which the bottom is planar on its interior surface but formed with thin areas on the exterior of the bottom, in between which, is a footed formation.

Construction of universal egg cell cushion and method

Nestable multi-section hinged cartons having lobe formations extending into the carton ends which may act as a fulcrum acts so as to adjust into parallelism a slightly askew carton presented to a nest of similar cartons when the pressure of a subsequent carton is applied to the nest.

Nestable and denestable molded egg cartons

A tray of molded pulp or like material for carryout food and beverage comprising one or more pockets for receiving and firmly supporting any one of several different size beverage containers normally used in the carry-out food trade, each of the pockets having a circular floor portion, a web portion extending for a full 360.degree. around the circular floor portion in an area adjacent the circular floor portion and diverging in the upward direction, the web portion extending along a generally conic surface to an upper ridge, a plurality of circumferentially spaced apart tower-like members extending radially inwardly of the pocket from the web portion to firmly grip and support a beverage container which may be received in the pocket member but being too large in diameter to reach the circular floor portion, each of the tower-like members extending upwardly from the web portion at an area above the upper ridge of the web portion, each of the tower-like members including a pair of circumferentially spaced radially inwardly extending flanges having integral therewith at upper ends thereof a generally horizontal bridge, the pair of radially inwardly extending flanges and the bridge having radially inner edges which together with the web portion define an aperture facilitating stacking a tray having such pockets formed therein with like tray in nesting relationship, the radially inner edges of the flanges extending from upper ends thereof at the respective bridges toward the respective lower ends thereof at a steeper angle with the horizontal and closer to the vertical than the web portion whereby any beverage container received in the pocket will upon coming into contact with the radially inner edge of one of the flanges be maintained inwardly of the aperture defined thereby and above the circular floor portion to insure that any drippage or spillage from a beverage container will be retained within the floor portion within the enclosure provided by the web portion in the area adjacent the floor portion.

Molded pulp tray for beverage and food

Method of eliminating warpage of molded fiber trays during free drying by pressing the back side of the preform where ribs cross with a dimpling projection on a rubber insert in a pressure head on a molding machine.

Method of warpage control for molded fiber trays

A tray of molded pulp or the like for packaging meat, poultry or fish in conjunction with an overwrap transparent film and the method and apparatus for making the tray. The tray bottom is formed of a plurality of generally vertical ribs joining or intersecting in two directions and defining open windows therebetween, the height of each rib being on the order of several times the thickness of the remainder of the tray, the side and end walls having double sloped portions, and the total volume of the ribs being approximately equal to the volume of a bottom of an imperforate bottom tray of the same size. The method of making a tray including the steps of (a) taking a wet preform of molded pulp or the like formed in an open bottom construction with a plurality of inverted V or U-shaped ribs joining or intersecting in two directions and defining open windows therebetween and pressing the side walls of the V or U-shaped ribs together to impart to said ribs the form of generally vertical ribs with parallel side wall portions, and (b) drying the tray under controlled conditions to final form for storage or shipment. The apparatus for making a tray comprising a male forming die member including a plurality of rib grooves joining or intersecting in two directions into which a wet preform of molded pulp or the like may be transferred; a stuffing element for effecting initial seating of the rib members of the wet preform within the rib grooves; and female press die member with a plurality of insert plugs for pressing the ribs of the preform into the rib grooves of the male die member into fully seated relationship whereby final shape of the tray is imparted to the preform.

Apparatus for making high strength open bottom packaging tray

A molded egg carton having a windowed cover and a cellular tray for the reception of eggs in which the windowed cover includes downposts and the tray includes up posts and in which the downposts have an offset male portion and the up posts are formed with a recess in their uppermost portion adapted to receive the offset lowermost tip of the offset male portion. The windows in the cover are on each side of the downposts and are set in relatively steep walls which form parts of the downposts. The windows are provided with 'eye lid' formations.

Growing community of inventors

Cape Elizabeth, ME, United States of America

Henry A Lord