An object of the present invention is to ensure rigid formation of the folds of the protrusions of the paper sheet and smooth conveyance of the folding-processed paper sheet to the downstream side of the folding position in the paper conveyance direction without causing the problems such as jamming. A folding unit includes a lower guide plate arranged at a position facing a folding plate at the folding position, and an arrangement position of a turning shaft of the folding plate is vertically movable with respect to the lower guide plate.

An object of the present invention is to ensure rigid formation of the folds of the protrusions of the paper sheet and smooth conveyance of the folding-processed paper sheet to the downstream side of the folding position in the paper conveyance direction without causing the problems such as jamming. A folding unit includes a lower guide plate arranged at a position facing a folding plate at the folding position, and an arrangement position of a turning shaft of the folding plate is vertically movable with respect to the lower guide plate.

An object of the present disclosure is to prevent wrinkles in a folding line portion of a paper irrespective of the conditions such as the type, the size, and the like of the paper, thereby securing the precision of the position of a folding line when a flap (such as a flap portion) of an envelope is folded back. The folding unit comprises a pair of an upper and a lower guide plates that defines part of the paper conveyance path at the folding position, and the folding plate is configured so that, when turning from the placement position to the overlap position, a lower face of the folding plate overlaps an upper face of the upper guide plate of the pair of the upper and the lower guide plates.

The invention relates to a tubular bag machine and a method for the continuous production of block-bottom bags (10) comprising two side areas folded in at the bottom and a transversally sealed bottom seam, the bottom seam comprising at least one first portion with a twin film web and at least one second portion with a quadruple film web, and the bottom seam running in the base surface des block-bottom bag (10). Once a bottom seam has been transversally sealed, the front block-bottom bag (10) is severed from the film web (03) by applying a film cut, and the transverse sealing jaws (09) moving in the conveying direction are opened far enough for the transverse sealing jaws (09) to exert essentially no more pressure on the bottom seal, and the transverse sealing jaws (09) moving in the conveying direction simultaneously move perpendicular to the conveying direction, the bottom seam thus being folded over perpendicular to the conveying direction, and the folded-over bottom seam is fixed in such a manner that it runs in the base surface of the block-bottom bag (10)

The invention relates to a tubular bag machine and a method for the continuous production of block-bottom bags (10) comprising two side areas folded in at the bottom and a transversally sealed bottom seam, the bottom seam comprising at least one first portion with a twin film web and at least one second portion with a quadruple film web, and the bottom seam running in the base surface des block-bottom bag (10). Once a bottom seam has been transversally sealed, the front block-bottom bag (10) is severed from the film web (03) by applying a film cut, and the transverse sealing jaws (09) moving in the conveying direction are opened far enough for the transverse sealing jaws (09) to exert essentially no more pressure on the bottom seal, and the transverse sealing jaws (09) moving in the conveying direction simultaneously move perpendicular to the conveying direction, the bottom seam thus being folded over perpendicular to the conveying direction, and the folded-over bottom seam is fixed in such a manner that it runs in the base surface of the block-bottom bag (10)

A packaging machine for forming doy-pack bags includes: a base; a reel-holding frame, configured to carry a reel of packaging film or a sheet-holding reel having a band with packaging sheets; a gripping and folding group configured to pick up and fold like a book, by facing two symmetrical parts thereof, either a portion of the packaging film or a packaging sheet; shaping apparatus for shaping a recessed bottom (B) of a doy-pack bag (A); a joiner for sealing the facing side edges of the two symmetrical parts either of a portion of the packaging film or of a packaging sheet; pick-up apparatus adapted to remove the portion of the packaging film or the packaging sheet, folded and with the facing side edges sealed, from the gripping and folding group.

A packaging machine for forming doy-pack bags includes: a base; a reel-holding frame, configured to carry a reel of packaging film or a sheet-holding reel having a band with packaging sheets; a gripping and folding group configured to pick up and fold like a book, by facing two symmetrical parts thereof, either a portion of the packaging film or a packaging sheet; shaping apparatus for shaping a recessed bottom (B) of a doy-pack bag (A); a joiner for sealing the facing side edges of the two symmetrical parts either of a portion of the packaging film or of a packaging sheet; pick-up apparatus adapted to remove the portion of the packaging film or the packaging sheet, folded and with the facing side edges sealed, from the gripping and folding group.

A method of manufacturing an SOS bag of indefinite length is disclosed including, as a preliminary step, providing a gusseted tube of indefinite length. In a series of steps, the gusseted tube may be folded inwardly at its base to create front and rear flaps that are then folded about fold lines to create a folded bottom gusseted tube. A rectangular patch may then be applied thereto in a series of steps, including for example hot air welding and/or ultrasonic welding, to complete an embodiment of a bag of the disclosure, one having a unique bottom for an SOS bag. The disclosure additionally includes bags manufactured by the method disclosed herein, as well as SOS bags having the unique construction disclosed herein.

Feedstock is delivered perpendicular to the line of applied glue in an automated gluing machine, thereby simplifying operation and better accommodating other in-line factory or assembly processes. The machine comprises an input nip for receiving the head end and the tail end of a sheet stock in overlapping registration, with the tail end being longer than the head end. A clamp mechanism holds the overlapping sheet stock in position while a glue applicator applies glue to one side of the tail end. An output nip holds the glued side of the tail end against the head end, and apparatus is provided for ejecting the sheet stock once the tail end has been glued to the head end. The glued stock may be ejected back toward the operator or away from the operator and through the machine, enabling the machine to be placed in-line with other machines for a continuous directional or linear flow.