Differential mandrel for sheet-slitting machine recoiler

Details Differential mandrel for sheet-slitting machine recoiler Differential mandrel for sheet-slitting machine recoiler

1985-01-23

1986-06-10

Jillions, John M.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 564, 242 72R, B65H 1808, B65H 1524

Patent

active

045938644

ABSTRACT:
When strips are cut from a coil of sheet material, they may differ in length because of differences in thickness across the sheet. These differences in length are accommodated by the slit strips being wound by separate rotational forces. Recoiler mandrels are divided into sections mounted on the same shaft and each having a hydraulic unit. Each hydraulic unit includes a pressure side and a suction side, the pressure sides of all of the hydraulic units being connected, and the suction sides of all of the units being connected, thereby forming a closed hydraulic system wherein increased pressure in one hydraulic unit due to increased tension on the respective mandrel section is balanced by the remaining hydraulic units and respective mandrel sections.

REFERENCES:
patent: 3225418 (1965-12-01), Fara
patent: 3289966 (1966-12-01), Richel
patent: 3817468 (1974-06-01), Smolderen et al.
patent: 4026491 (1977-05-01), Bostroem
patent: 4218029 (1980-08-01), Schwenzfier et al.
patent: 4220291 (1980-09-01), Papa
patent: 4266737 (1981-05-01), Mastriani
patent: 4332356 (1982-06-01), Damour
"Noncontacting Strip Tension System Provides Tight Coils", By William P. Rutledge, Sales Engineer, Stamco Sales, Inc., New Bremen, Ohio (Iron and Steel Engineer, Feb. 1971).

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