Winding – tensioning – or guiding – Coil holder or support – Radially expansible or contractile
Reexamination Certificate
1999-03-31
2001-09-04
Nguyen, John Q. (Department: 3653)
Winding, tensioning, or guiding
Coil holder or support
Radially expansible or contractile
C242S530100
Reexamination Certificate
active
06283404
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The disclosed relates to an improved, economical, lock shaft for use in rewinding materials from a full-length core to multiple, smaller cores.
2. Brief Description of the Prior Art
During the manufacturing of rolled materials, such as fabric, paper, adhesives. etc., the machinery used places the material onto long cores. The material is subsequently cut, while on the original core, and the cut material is rerolled onto new cores cut to the appropriate width. The problem of rewinding the material onto smaller cores and removing those cores has, until now, required expensive, complicated equipment.
In U.S. Pat. No. 3,029,037 a shaft is disclosed for rewinding that is expanded during the rewinding process and unexpanded for removal of the cores. The elongated, substantially cylindrical member has a portion, intermediate the ends, which is slotted. The slots radially extend outwardly when pneumatic, or other pressure-fluid-operated means are applied. This radial expansion of the intermediate portion, is accompanied by a slight bowing outwardly of the wall of the cylindrical member. Although the '037 device does accomplish the desired effect, the cost of the multi-pieced shaft and pneumatics is substantial and the manufacturing more complicated.
Drum-type winders are employed in particular to wind webs of paper or cardboard deriving from a supply reel into smaller individual reels, whereby the web from the supply reel is simultaneously slit longitudinally into individual webs. They have two or more drums and the reels are wound axially adjacent onto cores in the valley between two drums. Once the drums have attained the desired diameter, the longitudinally slit individual webs arriving from the supply reel are separated, the finished reels unloaded and fresh cores inserted. U.S. Pat. No. 5,012,987 improves on the prior art drum winders by incorporating core accommodation to enable different sized cores to be used.
The foregoing drum winders, however, transfer into smaller diameter cores and no means are provided to enable rewinding to smaller length cores.
SUMMARY OF THE INVENTION
A material transfer system is disclosed that uses a hollow cylindrical lock shaft for rewinding flexible material from an original core to at least one transfer core. The shaft has an interior wall, an exterior wall, a length, and at least one curved locking base. Preferable more than one curved base is recessed along the length of the shaft. The curved locking bases extend along the length and are recessed within the exterior wall of the shaft. The locking bases have a first wall and a second wall with a floor having a progressively decreasing radius from the first wall to the second wall. Multiple legs, having a length less than the radius of the shaft, extend radially from the interior wall for at least a substantial portion of the shaft's length. Multiple gripping feet are at the distal ends of the legs distal end and are dimensioned to receive an inner shaft in a manner to prevent movement between the two shafts. The length of the legs and feet are dependent upon the distance between the interior of the lock shaft and the exterior of the inner shaft.
A plurality of locking ribs extending substantially the length of the locking bases approximately equidistant between the first and second walls and are affixed to the floor at the each end of the locking rib. A pair of slots are placed at the end of each locking base to receive, and secure, the locking ribs. Alternatively receiving holes can be placed at each end and the locking ribs can be affixed through use of the receiving holes. The locking ribs have a diameter sufficient to enable the locking rib outer circumference to extend beyond the circumference of the shaft exterior wall about 25,000
th
to 125,000
th
of an inch.
At least one locking strip is affixed to at least a portion of the shaft's length, extending beyond the circumference of the exterior wall to prevent the cores from moving freely. The locking strip can be affixed to the locking base floor or a channel can be placed in the shaft and the locking strip affixed within the channel.
To transfer material, a rotating interior shaft, dimensioned to be received by multiple gripping feet in a non-slip manner, is placed within the lock shaft. The interior shaft has a gear member to rotate the interior shaft in a clockwise and counterclockwise direction. Transfer cores are placed on the lock shaft to receive the material. Rotating the gear member in a first direction prevents rotation of the transfer core relative to the interior shaft by wedging the locking rib between the transfer core and locking base proximate the first wall. The material can then be wound onto the transfer core without the core slipping. Rotating the gear member in a second direction enables rotation and removal of the transfer core relative to the interior shaft by placing the locking rib proximate the second wall.
REFERENCES:
patent: 2561745 (1951-07-01), Lerch
patent: 3007652 (1961-11-01), Heckman
patent: 3029037 (1962-04-01), Williams et al.
patent: 3817468 (1974-06-01), Smolderen et al.
patent: 4519620 (1985-05-01), Keith
patent: 4767077 (1988-08-01), Kataoka
patent: 5012987 (1991-05-01), Dropczynski
Nguyen John Q.
Peter Sheldon H.
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