Abstract: A flexible package for holding a flowable material therein and method of use to enable the flowable material to be introduced into a dispensing system via an inlet tube. The flexible package has a body portion and a projection which forms a mouth for the package and is in communication with the interior of the package. The projection is openable for receipt of the inlet tube and is arranged to be clamped into engagement with the inlet tube to form a fluid-tight interface by use of a clamping mechanism. The fluid-tight interface is releasable, when desired.

Abstract: A flexible package for holding a flowable material therein and method of use to enable the flowable material to be introduced into a dispensing system via an inlet tube. The flexible package has a body portion and a projection which forms a mouth for the package and is in communication with the interior of the package. The projection is openable for receipt of the inlet tube and is arranged to be clamped into engagement with the inlet tube to form a fluid-tight interface by use of a clamping mechanism. The fluid-tight interface is releasable, when desired.

Abstract: A flexible package and a method of packaging a product having a distinct shelf life in a flexible package to provide an indication of the product's shelf-life. The package has a hollow body formed of a flexible material in which the product is disposed and which is suitable for isolating the product within the package from the ambient atmosphere. The body also includes a window portion formed of a transparent material and an internal pocket located under the window. The internal pocket is arranged to hold a shelf-life indicating card at the window to be visible therethrough. The card may include indicia which is changeable in response to conditions existing within the package.

Abstract: An article is disclosed comprising a lid engaged to a container by the formation of interlocking waves of lid material and container material at the junction of the lid and container. The interlocking waves are geometrically aligned relative to the interior of the container so as to maximize the burst strength of the container, and also to minimize the force required to peel the lid from the container. An unheated clamp head is used to clamp the lid structure immediately adjacent a heated seal head, the heated seal head being used to form the interlocking wave structure around the inside rim of the container. The clamp head prevents any melted portions of the container or lid from flowing to or towards the outside rim of the container, and thereby prevents the formation of similar interlocking waves about the outside rim of the container.

Abstract: An apparatus is disclosed that engages a lid to a container by the formation of interlocking waves of lid material and container material. The interlocking waves are geometrically aligned relative to the interior of the container so as to maximize the burst strength of the container, and also to minimize the force required to peel the lid from the container. An unheated clamp head of the apparatus is used to clamp the lid structure immediately adjacent a heated seal head used to form the interlocking wave structure about the inside rim of the container, so as to prevent any melted portions of the container or lid from flowing to or toward the outside rim of the container, so as to prevent the formation of similar interlocking waves about the outside rim of the container.

Abstract: A method is disclosed wherein a lid is engaged to a container by the formation of interlocking waves of lid material and container meterial about the interior rim of the container. The interlocking waves are geometrically aligned relative to the interior of the container so as to maximize the burst strength of the container, and also to minimize the force required to peel the lid from the container. An unheated clamp head is used to clamp the lid structure immediately adjacent a heated seal head used to form the interlocking wave structure about the inside rim of the container. The unheated clamp head prevents any melted portions of the containter or lid from flowing to or towards the outside rim of the container. Interlocking waves of material are thereby prevented from forming about the exterior rim of the container.

Abstract: A method for joining a lid to a container includes the formation of interlocking waves of material at the location where the lid joins the container. The interlocking waves are geometrically aligned relative to the interior of the container so as to maximize the burst strength of the container and minimize the peel strength of the lid from the container.

Abstract: A method and apparatus are disclosed for heat sealing two thermoplastic parts by clamping the parts together with a cooled clamp so that the edges of the parts are exposed and melting the edges together by contacting them with a hot seal head wherein a layer of a protective material is interposed between the hot seal head and the parts to be sealed.

Abstract: The invention is a thermoplastic lid which utilizes a bellows action to prevent paneling in the thermoplastic container to which it is attached. The lid comprises a flange for attachment to the container and a recessed center portion which has a flex area comprising a raised ridge adjacent to the outer ridge of the center portion. The stiffness of the lid and the thickness of the flex area are no greater than the maximum which will allow the center portion of the lid to flex inwardly sufficiently to provide the minimum displacement of head space necessary to prevent paneling.

Abstract: A bag for packaging and displaying meat or poultry has a front and rear thermoplastic panel joined at a fold line at the bottom of the bag. An absorbent pad, having a non-stick layer, an absorbent layer and a securing device, is positioned at the bottom of the bag. The pad extends over both the front and rear panels and is secured to the panels. An opaque printing is provided on the panels and corresponds generally to the position of the pad.

Abstract: A bag for packaging and displaying meat or poultry has a front and rear thermoplastic panel joined at a fold line at the bottom of the bag. An absorbent pad, having two impervious non-stick layers sandwiching a non-woven absorbent layer, is positioned at the bottom of the bag. The pad extends over both the front and rear panels and is thermally welded to the panels. An opaque printing is provided on the panels and corresponds generally to the position of the pad.