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

Claim 7:
8. A gluing station for providing a glue to at least bottom flaps of an opened bottom square of bottoms of sacks with glue tracks of different dimensions, said gluing station comprising:
at least two application heads each having a glue application area whose extent is variable in a spatial direction (y), which is orthogonal to a feed direction of the sack bottoms, and each of the at least two application heads being movable in the spatial direction (y) relative to a bottom center line of the sacks,
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 bottom center line of the bottom of the sack,
with the at least two movable application heads each including
(i) a plurality of first glue valves, each of the first glue valves each having two glue application openings, which together provide a first glue application area, and
(ii) a single second glue valve disposed at one end of the movable application head, the second glue valve having only one glue application opening, which provides a second glue application area that is smaller than the first glue application area,
the single second glue valve thereby being configured to provide in the crease line area of the sacks, increased resolution of glue application in the second glue application area relative to the resolution provided by the two glue application openings of the first glue application area.