Abstract: Heat sealing bars are spaced circumferentially around a rotatable drum and seal together two face-to-face strips of material as the strips are drawn continuously around the drum. The sealing bars are automatically moved radially inwardly and outwardly to change the circumferential distance between the bars and the effective diameter of the drum and thereby keep the bars in register with printed material on the strips.

Abstract: The top of a flexible pouch is sealed when two heated bars are pressed into engagement with opposite sides of the pouch. One of the bars is formed with two angled surfaces which converge into intersecting relation with one another so as to drive moisture from the seal area and enable the formation of a substantially blemish-free seal.

Abstract: The disclosure relates to a multi-layer snack food packaging material particularly suitable for forming potato chip bags and the like. The material comprises an outer layer of polypropylene, a low density polyethylene laminator and an inner layer which is, itself, a coextrusion. The inner coextruded layer comprises a first layer of high density polyethylene, a second layer of polypropylene and a third layer of ethylene methyl acrylate. The ethylene methyl acrylate is coated with an emulsion of polyvinylidene chloride, which seals the inner layers together upon application of heat. The package has many advantageous characteristics for use in snack food packaging and does not require glassine. The material has excellent oxygen and moisture barrier properties, good stiffness, good grease resistance and bond strength appropriate for easy opening by the consumer.

Abstract: A display carton in the form of a prism with triangular bases and a recessed, outwardly bowed front face is disclosed herein.

Abstract: Flexible pouches are advanced continuously around an arcuate path and are filled with food chunks during the advance. A filling apparatus initially deposits the food chunks into metal containers which are circulated to a continuously rotating turret adapted to move the containers around the path in vertical registry with the pouches. As the containers are advanced by the turret, plungers force the food product out of the containers, through funnels and into the pouches. The empty containers then are removed from the turret and are returned to the filling apparatus.

Abstract: Sealing heads for heat sealing the tops of continouously movable upright pouches are spaced angularly around a continuously rotatable turret and seal the pouches after steam has been introduced into the pouches and as the pouches move in an arcuate path extending around the turret. Each sealing head includes a pair of heated sealing bars and further includes a cam-operated actuator which sequentially lowers the bars, closes the bars, opens the bars, and then raises the bars as the bars rotate with the turret.

Abstract: Upright pouches are successively severed from the leading end portion of a continuously advancing strip of interconnected pouches by a pair of coacting blades which track the strip and which momentarily move at the same speed as the strip. At that time, one blade is shifted laterally toward the other blade to cut the leading pouch from the strip. Prior to the cutting, a notch is formed in the upper edge portion of the strip between adjacent pouches to impart a desired shape to the upper corners of the pouches and to enable the use of a relatively simple stationary splitter for keeping the two upper edge portions of each pouch separated from one another.

Abstract: Product is delivered into a funnel which then is moved downwardly to deposit the product into a pouch. The funnel includes a movable plate which initially is disposed in a closed position to enable the funnel to receive and retain the product. As the funnel travels downwardly, the plate moves to an open position to enable the product to be delivered out of the funnel and into the pouch. When the plate moves to its open position, the interior of the funnel takes on the same shape as a plunger which moves downwardly through the funnel to force the product out of the funnel.

Abstract: Pouches are advanced broadwise by carriers each having two laterally spaced clamps for gripping the side margins of the pouch. The clamps are supported by pivoted linkages which enable the clamps to be moved laterally toward and away from one another for the purpose of opening and closing the mouth of the pouch as the pouch is advanced through the filling and top sealing stations of a packaging machine.

Abstract: An envelope-type pouch is divided into two compartments by a divider panel which is disposed between and is sealed to the two side panels of the pouch. The top margin of the divider panel and the top margin of one of the side panels are disposed above the top margin of the other side panel to facilitate opening of the pouch by an automatic packaging machine. Sealing of the upper end of the pouch is effected by first sealing the top margin of the divider panel to the top margin of the one side panel and then by sealing the top margin of the other side panel to the divider.

Abstract: Flexible pouches filled with product are advanced to a steaming station where steam is introduced into the pouches to remove the air therefrom. The pouches are closed and sealed while in the presence of steam and before being advanced out of the steaming station so as to prevent air from re-entering the pouches.

Abstract: Disclosed herein is a stocking envelope having an improved sealing arrangement provided by a pair of stripes of "bimodal adhesive" laid down wet during initial envelope formation to join the glue flaps of the envelope to associated major envelope panels. Subsequently, portions of the dried stripes of "bimodal adhesive" are reactivated by heat during envelope closing to seal an overlying closing flap to a major panel through special apertures formed in the glue flaps.

Abstract: A folded paperboard dispenser for supporting a roll of pressure sensitive adhesive backed labels removably adhered to a release coated carrier web. The new structure includes a unique arrangement of elements which combine to protect the label roll and to dispense individual "butt-cut" or "laid-on" labels from the roll when the carrier web is drawn over and rearwardly of a special stripper tongue to delaminate and project individual pressure sensitive coated adhesive labels outwardly of the dispenser for use.