Abstract: Apparatus for folding, bonding and severing a longitudinally extending web, comprising a rotatable disc having a plurality of circumferentially spaced-apart, radially extending protrusions at its periphery, means for rotating the disc, means for feeding the longitudinally extending web onto the disc during rotation thereof, so that outer extremities of the protrusions contact the web at its medial region to cause folding of the web so that its sides overlap one another between the protrusions, means for bonding the folded web at its overlapping sides between adjacent protrusions during rotation of the disc, and means for severing the folded web at its overlapping sides between adjacent protrusions during rotation of the disc. Also disclosed is a corresponding method wherein the longitudinally extending web is folded, bonded and severed.

Abstract: A machine for making plastic bags, such as trash or garbage bags, includes a rotary sealing drum of variable diameter, the drum including one or more sealing bars for cross-sealing a flattened plastic film tube passing through the machine. A blanket tensioning system surrounds the drum and is adjustable to compensate for different drum diameters. The sealed film passes over a chill roll after leaving the drum-blanket assembly and is drawn over folding boards by pull rolls. The sealed and folded film is then perforated by a fly knife and is preferably also cut on the sides to produce a connected series of bags which may easily be separated from one another to make the bags suitable for easy dispensing packages. A variator assembly may also be provided to insure a proper skirt length between the cut-perforation and the bag seal.

Abstract: A folding insert for forming a jacket to be used for a device to form a envelope-shape jacket for a magnetic cartridge. The folding insert is provided with protrusions and grooves along both side edges thereof, whereby flaps of the jacket material can be bent more than 180.degree. by a folding bar along the protrusions of the folding insert.

Abstract: A multiple pocket envelope for storing a floppy disk, microfiche, photographic negatives and positives, and the like and information related thereto, the envelope being formed from a single sheet (10) susceptible of folding by machine. A sheet (10) suitable for forming the envelope and a method of folding the sheet to form the envelope are also disclosed.

Abstract: A carryall handbag and mat formed of a single blank of foldable sheet material, one end being reversely folded onto an intermediate portion of the blank to define a reversely folded portion and an extended portion. A plurality of seams secures the reversely folded portion to define a pocket. In one form of the invention, an endless handle is connected to one edge of the folded blank, over which the blank, when folded, can be draped to define a handbag, and which blank can be readily unfolded to define a mat. In another form, the blank is folded so that the defined pocket can be turned inside out with the extended portion being disposed folded within the pocket.

Abstract: An apparatus for folding a jacket material, used mainly for a magnetic cartridge, is characterized by using a folding insert, a folding bar, and a heater bar, to form the jacket material into a jacket of good external shape and high dimensional precision with a folded corner entirely free from loosening, warping, waving, swelling, etc.

Abstract: Envelope blanks are scored and folded by pressing the flat blanks through a series of scoring and folding rolls. The rolls include vacuum rolls which invert the envelope blanks during the scoring operation. The blanks are scored laterally and as they pass over the outer surface of one of the vacuum rolls they are scored longitudinally. During the longitudinal scoring operation, the envelopes are curvilinear due to their being drawn down onto one of the vacuum rolls. After the longitudinal scoring operation, the blanks are inverted by being folded along the transverse score. The inverted, folded blanks are then moved along by a pair of cooperating vacuum rolls to a gumming station. After being gummed, the blanks are folded along their longitudinal scores with the folded flaps being secured in place by the gum.

Abstract: Apparatus for feeding, scoring, gumming, and folding a blank into an envelope.

Abstract: An apparatus for making thermoplastic carrier bags (so-called T-shirt bags) comprises means for feeding a continuous tubular strip of thermoplastic film, either side of which comprises a gusset fold, said strip being advanced with a constant velocity to a cylindrical drum the housing of which comprises embedded heatsealing means, said apparatus further comprising a cutting member and a transverse cutting knife co-operating with the strip said member sequentially providing the tubular strip with a U-shape cut upstream of the drum and said cutting knife operating synchronously with the cutting member in co-operation with the drum for transversely cutting through the strip somewhat beyond the legs of said U-shape cut so as to produce strip portions, said drum further comprising folding means for said strip portions.

Abstract: The non-gusseted, side seamed expansible envelope of the present invention comprises a back panel, front panel and closure flap prepared from a single blank of paper or the like. The side seams are formed from a first pair of flaps foldably attached to the ends of the back panel and a second pair of flaps foldably attached to the ends of the front panel. Each of the side seam flaps are applied with diagonally oriented perforated lines that are located equidistant from the score line separating the front and back panels, and the second pair of side seam flaps are also applied with longitudinally oriented perforated lines which together with the diagonally oriented perforated lines provide the expansion characteristics of the envelope.

Abstract: Sections of bag-making material are successively and intermittently fed by double belt conveyors to arrive beneath a vertically reciprocatable push member which engages each section by suction and forms a central loop in each section while its ends are yieldingly engaged by brake shoes co-operating with side supports.

Abstract: Disclosed is an apparatus and method for the continuous production of packaging wrappers from cut blanks of flat material. A flap-like portion of the blank material is abraded in a particular fashion to produce an area which upon folding and gluing provides a bonded joint having a thickness in the area of the bonding essentially equal to the thickness of the flat material of the wrapper. The packaging wrapper produced possesses an interior surface completely void of protrusions or uneven areas and an overall wrapper of even thickness throughout.