Device for placing a paper bag bottom
AssigneeWindmoeller & Hoelscher KG
InventorsRuediger Duwendag, Marco Daher
Life of this patent
Estimating the term…
Abstract
A device for placing a paper bag bottom produces score lines on the ends of tubular segments which are used for producing bags, applies glue layers to the folded bottoms on the extremities of the tubular segments and/or to sheets for gluing them with the bottoms with the aid of gluers and connects and glues the folded bottoms and the sheets. The device has at least one gluer which includes at least one glue reservoir or at least one glue duct, the glue contained in the reservoir or in the duct being exposed to a pressure higher than ambient pressure. The glue reservoir or the glue duct is provided with at least one output orifice for applying the glue to the sheets and/or to the folded bottoms.
Claims41
A bottoming device for forming a cross bottom paper bag, the device configured to form the cross bottom of the paper bag by providing folds at extremities of a tubular segment from which the bag is produced such that lines of a glue are applied to at least one of a folded bottom on the extremities of the tubular segment and a sheet to be glued with the bottom, and to connect and glue the folded bottom and the sheet, the bottoming device comprising
- a gluer having an application head with a glue duct in which the glue is exposed to a pressure that is higher than ambient pressure such that the glue is transported throughout the application head,
- the application head including a plurality of valves each having at least one glue output orifice through which the glue is directly applied to the at least one of the folded bottom and the sheet, the valves being arranged in a configuration that includes at least a first valve row (VRi) and a second valve row (VRii) with each of the first and second valve rows extending along a length of the application head in a direction (y) that is transverse to a bag transfer direction (x), and
- a glue circulation channel that provides for circulation of the glue within the application head, the glue circulation channel including (i) a first transverse channel and a second transverse channel each extending along the length of the application head in the (y) direction, and (ii) a connection channel extending across the application head in the (x) direction, the connection channel connecting an end of the first transverse channel to an adjacent end of the second transverse channel, the glue circulation channel providing for glue flow through the first transverse channel, across the connection channel, and through the second transverse channel to drain from the application head.
A bottoming device that forms a cross bottom paper bag, the device configured to form the cross bottom of the bag by providing folds at extremities of a tubular segment from which the bag is produced such that lines of a glue are applied to at least one of a folded bottom on the extremities of the tubular segment and a sheet to be glued with the bottom, and to connect and glue the folded bottom and the sheet, the bottoming device comprising
- a gluer having an application head including a plurality of valves each having at least one glue output orifice through which the glue is directly applied under pressure to the at least one of the folded bottom and the sheet,
- the valves being arranged in a configuration that includes a plurality of valve rows (VRi to VRn) each extending along a length of the application head in a direction (y) that is transverse to a bag transfer direction (x), with each of the valve rows including a plurality of valves (Vi to Vn) arranged along a length of the valve row, and
- a glue circulation channel that provides for continuous circulation of the glue within the application head, the glue circulation channel including (i) a first transverse channel and a second transverse channel each extending along the length of the application head in the (y) direction, and (ii) a connection channel extending across the application head in the (x) direction, the connection channel connecting an end of the first transverse channel to an adjacent end of the second transverse channel, the glue circulation channel providing for glue flow through the first transverse channel, across the connection channel, and through the second transverse channel to drain from the application head.
A bottoming device that forms a cross bottom paper bag, the device configured to form the cross bottom of the bag by providing folds at extremities of a tubular segment from which the bag is produced such that lines of an adhesive are applied to at least one of a folded bottom on the extremities of the tubular segment and a sheet to be adhered with the bottom, and to connect and adhere the folded bottom and the sheet, the bottoming device comprising
- an adhesive application head including a plurality of valves each having a plurality of adhesive output orifices through which the adhesive is directly applied under a higher-than-ambient pressure to the at least one of the folded bottom and the sheet in a contact-free manner, the valves being arranged in a configuration that includes a plurality of valve rows (VRi to VRn) each extending along a length of the application head in a direction (y) that is transverse to a bag transfer direction (x), with each of the valve rows including a plurality of valves (Vi to Vn) arranged along a length of the valve row, and
- an adhesive circulation channel that provides for continuous circulation of the adhesive within the adhesive application head, the adhesive circulation channel including (i) a first transverse channel and a second transverse channel each extending along the length of the application head in the (y) direction, and (ii) a connection channel extending across the application head in the (x) direction, the connection channel connecting an end of the first transverse channel to an adjacent end of the second transverse channel, the adhesive circulation channel providing for adhesive flow through the first transverse channel, across the connection channel, and through the second transverse channel to drain from the application head.
Dependencies are inferred from the claim text.