Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1987-02-24
1987-12-01
Levy, Stuart S.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
B65H 2600
Patent
active
047098724
ABSTRACT:
To provide for controlled braking effort on a selected paper roll (5) from which a web (14) is applied to a utilization machine, and additionally for fast-stop or holding conditions, the roll is coupled to an operating disk brake (10) which receives braking pressure from a regulated pressure source. Additionally, rapid-stop brake calipers forming a rapid-stop brake (11) are applied to the disk, preferably having a higher braking friction coefficient, and controlled from the regulated pressure via a fluid disjunctive or OR-gate valve (42). A magnetic valve (36), controlled by a computer-controller (28), selectively switches the controlled fluid pressure through the OR-gate valve (42) only to the operating brake or to the fast-stop brake and, via a branch connection (46a), also to the operating brake. Under high emergency conditions, or to hold a roll stopped, for example for roll changing, unregulated pressure can be applied to both the operating brake (10) and the fast-stop brake (11) by a further electromagnetically controlled valve (38) connected through a further OR-gate valve (44) to the second output of the first electromagnetically controlled valve (36).
REFERENCES:
patent: 686826 (1901-11-01), Mullers
patent: 1990643 (1935-02-01), Fankboner
patent: 3813052 (1974-05-01), Swann et al.
patent: 3913855 (1975-10-01), Heimlicher et al.
patent: 4000865 (1977-01-01), Gaskins
patent: 4151594 (1979-04-01), Stern
Hammer Josef
Handschuher Walter
Levy Stuart S.
M.A.N.--Roland Druckmaschinen Aktiengesellschaft
Matecki Katherine
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