A gripping device (200) is proposed for gripping a sewing thread (415) in a bookbinding sewing machine (100). The gripping device (200) comprises a crochet (205) and a body (220) that are slidable reciprocally between an open condition, wherein a hook (215) of the crochet (205) hooks the sewing thread (415), and a closed condition, wherein the hook (215) blocks the sewing thread (415); the body (220) has one or more channels (270) crossing it for conveying a gas jet towards the hook (215). A bookbinding sewing machine (100) comprising one or more gripping devices (200) is also proposed. Moreover, a corresponding method for sewing signatures (115) into book blocks (155) is proposed.

A gripping device (200) is proposed for gripping a sewing thread (415) in a bookbinding sewing machine (100). The gripping device (200) comprises a crochet (205) and a body (220) that are slidable reciprocally between an open condition, wherein a hook (215) of the crochet (205) hooks the sewing thread (415), and a closed condition, wherein the hook (215) blocks the sewing thread (415); the body (220) has one or more channels (270) crossing it for conveying a gas jet towards the hook (215). A bookbinding sewing machine (100) comprising one or more gripping devices (200) is also proposed. Moreover, a corresponding method for sewing signatures (115) into book blocks (155) is proposed.

A leveler device (200) is proposed for use in a bookbinding sewing machine (100) adapted to sew signatures (115) into book blocks (155) with one or more sewing threads (415). The leveler device (200) is used to level each signature (115) loaded onto amovable saddle (150). The leveler device (200) has at least one inlet (215) for receiving a gas jet and one or more nozzles (220) for ejecting the gas towards corresponding free ends of the threads (415) projecting from a last signature (115) of each completed bookblock (155). A bookbinding sewing machine (100) comprising the leveler device (200) is also proposed. Moreover, a corresponding method for operating a bookbinding sewing machine (100) is proposed.

A leveler device (200) is proposed for use in a bookbinding sewing machine (100) adapted to sew signatures (115) into book blocks (155) with one or more sewing threads (415). The leveler device (200) is used to level each signature (115) loaded onto amovable saddle (150). The leveler device (200) has at least one inlet (215) for receiving a gas jet and one or more nozzles (220) for ejecting the gas towards corresponding free ends of the threads (415) projecting from a last signature (115) of each completed bookblock (155). A bookbinding sewing machine (100) comprising the leveler device (200) is also proposed. Moreover, a corresponding method for operating a bookbinding sewing machine (100) is proposed.

The present apparatus is provided with a placement tray (processing tray) to place sheets to undergo binding processing, and a bind unit that is able to shift along an end edge of sheets on the placement tray and that binds a plurality of sheets as a single bunch, where in the bind unit, a needle bind unit for performing binding processing on a bunch of sheets with a needle and a needleless bind unit for performing binding processing without a needle are provided together in a shift direction of the bind unit, and a length of the needleless bind unit is configured to be shorter than a length of the needle bind unit in the shift direction of the bind unit. By this means, provided is the apparatus capable of miniaturizing the entire apparatus, with the needle bind unit and needleless bind unit provided together.

The present apparatus is provided with a placement tray (processing tray) to place sheets to undergo binding processing, and a bind unit that is able to shift along an end edge of sheets on the placement tray and that binds a plurality of sheets as a single bunch, where in the bind unit, a needle bind unit for performing binding processing on a bunch of sheets with a needle and a needleless bind unit for performing binding processing without a needle are provided together in a shift direction of the bind unit, and a length of the needleless bind unit is configured to be shorter than a length of the needle bind unit in the shift direction of the bind unit. By this means, provided is the apparatus capable of miniaturizing the entire apparatus, with the needle bind unit and needleless bind unit provided together.

The present apparatus includes a placement tray to place sheets to undergo binding processing, and a press bind unit shifting along an end edge of sheets on the placement tray. The press bind unit includes a receiving tooth, and pressing teeth meshing with the receiving tooth to perform press binding on sheets nipped therebetween, and the pressing teeth are provided to shift between a press position for meshing with the receiving tooth, and a retract position spaced apart from the receiving tooth so as to shift the press bind unit along the end edge of sheets with the sheets disposed between the receiving tooth and the pressing teeth. By shifting the pressing teeth to the retract position, it is possible to shift the sheet bind apparatus smoothly along the end edge of a bunch of sheets with the sheets disposed between the receiving tooth and the pressing teeth.

The present apparatus includes a placement tray to place sheets to undergo binding processing, and a press bind unit shifting along an end edge of sheets on the placement tray. The press bind unit includes a receiving tooth, and pressing teeth meshing with the receiving tooth to perform press binding on sheets nipped therebetween, and the pressing teeth are provided to shift between a press position for meshing with the receiving tooth, and a retract position spaced apart from the receiving tooth so as to shift the press bind unit along the end edge of sheets with the sheets disposed between the receiving tooth and the pressing teeth. By shifting the pressing teeth to the retract position, it is possible to shift the sheet bind apparatus smoothly along the end edge of a bunch of sheets with the sheets disposed between the receiving tooth and the pressing teeth.

The invention provides a stack comprising a plurality of absorbent sheets stacked in facing arrangement. The stack is bound along its top edge by at least one line of stitches comprising a plurality of spaced apart stitch holes and a thread disposed therein. Individual sheets further comprise a line of perforations comprising a plurality of spaced apart perforation holes. The line of stitches and the line of perforations are such that there is generally a one-to-one numerical correspondence amongst at least a majority of the plurality of stitch holes and perforation holes.

The invention provides a stack comprising a plurality of absorbent sheets stacked in facing arrangement. The stack is bound along its top edge by at least one line of stitches comprising a plurality of spaced apart stitch holes and a thread disposed therein. Individual sheets further comprise a line of perforations comprising a plurality of spaced apart perforation holes. The line of stitches and the line of perforations are such that there is generally a one-to-one numerical correspondence amongst at least a majority of the plurality of stitch holes and perforation holes.