EP 0152737 B1 19890426 - THREADING DEVICE FOR WEB-FED ROTARIES
Title (en)
THREADING DEVICE FOR WEB-FED ROTARIES
Publication
Application
Priority
DE 3405294 A 19840215
Abstract (en)
[origin: US4598850A] To permit formation of a threading element as a closed-loop structure, while being capable of accommodating threading paths of different lengths, the threading element is formed as a sprocket chain which has a long return portion (1) in a return path, coupled to a driven sprocket wheel (2), and connecting portions (3, 4) of a length suitable for the respective threading paths (B, C), and selectively connectable with the return portion (1), to thereby form a closed loop with the selected connecting portion (3 or 4). Pneumatically operated pistons located on path selection switches (5, 6) push the last link of the return portion into engagement with a selected end of the connecting portion, for example by engaging a cross pin (26) in a slotted end link (22, 23; 24, 25) of the connecting portions. The system is entirely automatically controllable, and additional pneumatically operated pistons (7, 10; 8, 11; 9, 12) engage between the links of the link pairs of the respective return and connecting portions of the sprocket chain to hold the respective portions in position during switch-over of the terminal link and, after switch-over, to retain in position that one of the connecting portions which is not connected, for future use.
IPC 1-7
IPC 8 full level
B41F 13/06 (2006.01); B41F 13/02 (2006.01); B41F 13/03 (2006.01); B65H 20/00 (2006.01)
CPC (source: EP US)
B41F 13/03 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE FR GB IT LI SE
DOCDB simple family (publication)
EP 0152737 A2 19850828; EP 0152737 A3 19870506; EP 0152737 B1 19890426; DE 3405294 A1 19850822; DE 3405294 C2 19860313; DE 3569701 D1 19890601; JP H0527548 B2 19930421; JP S60187552 A 19850925; US 4598850 A 19860708
DOCDB simple family (application)
EP 85100087 A 19850104; DE 3405294 A 19840215; DE 3569701 T 19850104; JP 2534985 A 19850214; US 70050385 A 19850211