An apparatus and method for forming a hem on a 5.sup.th panel of a liquid carton blank comprising a skiving section, a stepped creaser section, a burner section, a vacuum hemmer section, and a sealer section. Carton blanks are fed into the skiver section and exit from the sealer section at a high rate of speed. The final folding step in the process is performed by a vacuum hemmer which comprises a belt with holes for pulling a vacuum to securely hold the carton blank during the second and final ...

A container comprises a sleeve and two end walls. The sleeve is made of a tube having a plurality of paper layers. The end walls are inserted into the sleeve and are bonded in a sealed way thereto. According to the present invention, each of the end walls has a rim which projects outwards, around which rim the tube is bent and bonded by means of heat sealing. A stable, sealed bonding is thus obtained, whereby the application of different materials for the end walls is possible.

A tray forming machine comprising an infeed station for accepting a blank of corrugated plastic, and a transfer mechanism which automatically conveys the blank along a plane into a blank receiving station between a tray forming ram and a forming tool frame. The tray forming ram moves downward along a vertical path carrying the blank through the forming tool frame, during which the blank is folded into a generally upright tray configuration by a series of vertically displaced side and end forming...

A magnetic recording medium is disclosed wherein the data tracks are formed of magnetic layers and the non-data tracks are formed of non-magnetic layers. The data tracks and non-data tracks are alternately disposed and the non-data tracks do not effect recording/reproducing/erasing of the data tracks. Another medium is disclosed wherein the magnetic and non-magnetic layers are alternately disposed in the direction of recording/reproducing and the magnetizing transition width is shortened so that...

A bottom end closure for a liquid-carrying paperboard container, wherein particular diagonal and sloped score lines are formed on the inner closure panels by modified sealing jaws, such that, upon being engaged by the sealing jaws, the score lines enhance the formation of a concave shape to the bottom end closure. The result is that the filled container will sit flat and stand erect, without any interfering downward bulging.

An opening structure preferably located in a top panel of a one-way packaging container provides a pour opening which can be reclosed after the initial opening. The structure is prepared by positioning and sewing a portion of a strip of web material on the panel, defining a pour opening area within the secured strip portion by applying a cut or weakening line forming a boundary. The pour opening area of the panel is retained in its original position in the panel. Then a second, unsecured portion...

A lint filter for use in a clothes dryer includes a lint shield extending thereover with a door slidable over a through opening and a catch on the door to open the door as the filter is inserted into the dryer and to close the door as the filter is withdrawn. The lint shield covers the filter to prevent lint from accidentally falling therefrom and is hingedly connected to the filter for access during cleaning.

A coiled strip of filter material includes a pair of superimposed longitudinally coextensive strip portions each having a longitudinally extending free edge and a transversely spaced connected edge connected with the respectively other strip portion. A plurality of at least substantially parallel transverse corrugations is provided in only one of these strip portions and the convolutions of the coiled strip define with one another two spirally intercalated internal filter chambers one of which i...

A power semiconductor device has a first base layer of first conductive type, a contact layer of first conductive type formed on a surface of the first base layer, a second base layer of first conductive layer which is formed on the surface of the first base layer at a side opposite to the first contact layer and has an impurity concentration higher than that of the first base layer, a second contact layer of second conductive type formed on the surface of the first base layer or the second base...

A method of assembling a storage unit is disclosed. The method comprises applying heat to a groove separating a pair of walls to melt at least a portion of the plastic material, and pivoting the walls so that the surfaces of the groove contact and join as the melted plastic material solidifies.