Patent ID: 11865766
Assignee: BRÜCKNER MASCHINENBAU GMBH
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A longitudinal stretching system, comprising a longitudinal stretching unit, wherein:
the longitudinal stretching unit comprises a plurality of rollers arranged next to one another in a pull-off direction of a plastic film (F),
a plurality of the rollers is part of a preheating station (VH),
the longitudinal stretching unit further comprises at least one assembly exposed to wear, which is arranged in an installation position or operating position (A),
the assembly is arranged replaceably in the longitudinal stretching unit and can be removed and replaced by a further assembly,
wherein the longitudinal stretching system comprises, in addition to the installation position or operating position (A) of the longitudinal stretching unit, a standby position (D) and/or standby station at which the further assembly is kept on standby, wherein
the standby position (D) and/or the standby station is provided at either one of the following locations;
in the preheating station (VH) on the longitudinal stretching unit in a region directly above at least some of the plurality of the rollers of the preheating station (VH), or
laterally to the longitudinal stretching unit, wherein the further assembly provided in the standby positon (D) and/or the standby station laterally to the longitudinal stretching unit is joined via heating piping to a heating pipe system for heating the rollers in the preheating station (VH) and connected thereto, and

the standby position (D) and/or the standby station is arranged and/or configured in the longitudinal stretching system such that the further assembly provided at this standby position (D) and/or standby station, already before the installation at the operating position (A), is brought or can be brought to operating temperature or at least to a preheating temperature that is higher or less than 30° C. lower than operating temperature.