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 invention relates to a method for the manufacture of a printed, pre-creased, plastic-coated packing material web provided with opening arrangements. The method includes providing a first wider web of paper or cardboard, whose width is a multiple of the desired packing material webs, with impressed crease line patterns and opening arrangements, whereupon the paper or cardboard web is covered with plastics. The wider web so treated is then cut into a number of partial webs, each partial web is of a width corresponding to the width of a complete crease line pattern. The partial webs are rolled up into large rolls intended for transport which in a separate printing operation are provided with text and decoration and are rolled up into magazine rolls of packing material of the desired size.

Abstract: Handle bags are made from an elongated synthetic-resin tube having two longitudinal rows of indicia spaced apart in each row by a bag width and with the indicia of one row staggered equidistant between the indicia of the other row. The tube is passed step-wise over a cutting drum formed with an endless circumferentially extending and undulating cutting groove in which a blade engaged inwardly so that an undulating cut is formed longitudinally along the tube separating it into two tube halves which are then passed through a closeable transverse welder. One of the halves is deflected between the drum and the welder through detours dimensioned to put the flaps of the two bag halves in exact transverse alignment with one another. Each transport step is ended when the center of the indicia immediately upstream of the welder is spaced from the welder by a distance equal to half of the bag width and at this time the welder is closed on the tube to form bag-edge seams.

Abstract: This relates to a mandrel assembly for forming a continuous web into individual pouches. The web is drawn onto a reciprocating mandrel through a suitable guide so as to have adjacent free edge portions. The free edge portions are sequentially heat sealed by a side sealer and the so formed continuous tube is sequentially pushed onto the mandrels carried by a turret, followed by the heat sealing closed of the forward most portion of the tube and then the cutting thereof from the tube. A drive is provided for reciprocating each mandrel and the drive constructed wherein the advance of each mandrel may be selectively varied. The web is preferably provided with suitable indicia printed thereon and in order that the indicia may be properly oriented with respect to each bag or pouch, there is an indicia or printing detector which functions to vary the advance of the mandrel upon each stroke thereof so as to maintain registration of the printing.

Abstract: A method of forming a container strip of flexible sheet material having anti-corrosion inserts is disclosed. The method includes the steps of bringing two webs of flexible material into superimposed relationship, applying an adhesive to one of the webs, and feeding inserts, one by one, between the two webs. Thereafter, the webs are passed between rolls which compress the webs and the inserts to adhere the inserts to the web having adhesive. Edge seals, end seals, and perforations then are formed to produce a strip of flexible containers suitable for reception of corrosion prone articles.In an alternative embodiment, an adhesive is applied to both webs at spaced locations and an insert then is compressed between the webs at a location toward one end of the container. This technique produces a container having a header portion to provide support for display purposes.

Abstract: A method and apparatus for the cutting of a helically wound tube made of strips of paper, cardboard or the like, into container cylinders having a labeling which is wound thereon by a wrapping belt, the drive speed of the cutting mechanism being compared with the feeding speed of the strip of labels, and a correction in the cutting being effected in the event of any difference. For the correction of the cut, the value resulting from the comparison of the drive speed of the cutting mechanism with the feeding speed of the strip of labels is used to control the speed of the wrapping belt.