EP 0653352 A1 19950517 - Incrementally variable transmission between prestretching rollers in a stretch-film wrapping machine.
Title (en)
Incrementally variable transmission between prestretching rollers in a stretch-film wrapping machine.
Title (de)
Schrittweise verstellbares Getriebe zwischen Vorstreckungswalzen in einer Maschine zum Umhüllen mit streckbarer Folie.
Title (fr)
Transmission variable par incréments entre des rouleaux de pré-étirage dans une machine d'emballage à film étirable.
Publication
Application
Priority
SE 9303804 A 19931117
Abstract (en)
An incrementally variable transmission (16) for transmitting torque between input and output rollers (4,6) in a prestretching device (2) of a stretch-film wrapping machine achieves a selectable prestretching of a plastic film with a predetermined yield point, running in contact with the rollers. The input roller (4) is caused to rotate at lower rpm than the output roller (6), and the transmission (16) comprises a multiratio gear train (22) between an input shaft (28) and an output shaft (26), said gear train (22) being arranged in a housing (18), and a device (24) engaging and disengaging the input shaft (28) to or from the gear train. The input and output shafts (28,26) of the gear train are coaxial. The coupling device is a free-wheel clutch (20) which is in its engaged position when the input roller (4) is imparted, due to tension in the film between the rollers, a torque from the output roller (6), and the clutch (20) assumes its released position when said torque is absent. <IMAGE>
IPC 1-7
IPC 8 full level
B65B 11/02 (2006.01); B65B 11/04 (2006.01); B65B 11/00 (2006.01)
CPC (source: EP)
B65B 11/025 (2013.01); B65B 11/045 (2013.01); B65B 2011/002 (2013.01)
Citation (search report)
- [A] US 4336679 A 19820629 - LANCASTER PATRICK R, et al
- [A] EP 0220712 A1 19870506 - PIERI SRL [IT]
- [A] FR 2544702 A1 19841026 - POLYPACK IND [FR]
- [A] FR 2606365 A1 19880513 - SFEIMA SARL [FR]
Designated contracting state (EPC)
BE DE DK ES FR GB IT NL
DOCDB simple family (publication)
EP 0653352 A1 19950517; EP 0653352 B1 19970813; DE 69404948 D1 19970918; DE 69404948 T2 19980326; DK 0653352 T3 19980330; ES 2105592 T3 19971016; SE 502041 C2 19950724; SE 9303804 D0 19931117; SE 9303804 L 19950518
DOCDB simple family (application)
EP 94850205 A 19941117; DE 69404948 T 19941117; DK 94850205 T 19941117; ES 94850205 T 19941117; SE 9303804 A 19931117