Patent ID: 11931984
Assignee: WINDMöLLER & HöLSCHER KG
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 8:
9. An apparatus for production of sacks from semi-finished sacks, with which sacks of different format can be produced, said apparatus comprising:
at least one device that folds sack bottoms; and
at least one gluing station that provides a glue to at least bottom flaps of an opened bottom square of the sack bottoms,
the at least one gluing station (i) applying glue tracks of different dimensions at least on the bottom flaps, and (ii) including
at least two application heads each having a glue application area whose extent is variable in a spatial direction (y), each being movable relative to a bottom center line of the sacks, and each having a plurality of glue valves each having associated therewith a plurality of glue openings,
the at least two application heads having a maximum application area, in the spatial direction (y), defined by
for a smallest sack format gluable in the gluing station, a length of the application head maximum application area that is less than or equal to a spacing (D) located on one side of a bottom center line between an outer edge of the bottom flap of a largest sack format gluable in the gluing station and a crease line, the crease line being located, in the spatial direction (y), outward of the bottom center line of the bottom of the sack, and
for the largest sack format gluable in the gluing station, a length of the application head maximum application area that is greater than or equal to a spacing (E) located on the one side of the bottom center line between the outer edge of the bottom flap of the largest sack format gluable in the gluing station and the crease line, the crease line being located, in the spatial direction (y), outward of the center line of the bottom of the sack, and
the at least two application heads each having at an end thereof a single glue valve having associated therewith a corresponding single glue opening,
the single glue valve with the corresponding single glue opening thereby being configured to provide at the end of the application head, which services the crease line area of the sacks, an increased number of glue valves per unit length of the application head relative to the number of glue valves in a portion of the application head having the plurality of glue valves each having associated therewith a plurality of glue openings.