Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1988-01-04
1989-07-11
Levy, Stuart S.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
242 569, 242 81, B65H 1920
Patent
active
048464163
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to the field of machines for cutting and rewinding adhesive and non-adhesive tapes of different sizes.
The present invention provides, in particular, a fully automatic machine, that longitudinally cuts tapes to desired widths and rewinds the longitudinally cut strips around cores having different external nominal diameters. The art includes a machine which includes a jumbo roll and an unwinding stand, separated from the machine itself. Using rollers of different diameters, the machine unwinds tape from the jumbo roll. The prior art machine automatically supplies the tape with one or more cross tabs made of paper or plastic film. The prior art machine then cuts the tape longitudinally in strips of predetermined widths by one of the three following cutting systems: a razor blade cutting device, a system for score cutting by means of a hardened cylinder and circular dinking dies, or circular blades and counterblades. These cutting systems are well known.
According to the present invention, the tape strips are rewound around cores of desired external diameters. The tapes are cut when the rolls of rewound strips reach the desired length. Then the rolls are discharged into a basin.
Subsequently, rolls are discharged onto a suitable conveyor belt. The same station that discharges the rolls also carries out the loading of new cores.
An aim of the present invention is a machine of the above mentioned type, which is provided with one or more rewinding turrets. Each of these turrets is supplied with three stations as follows: a first station for rewinding previously cut tape strips, a second station for automatically cutting and fastening the cut end of the tape, and a third station for unloading rewound rolls and loading new cores. The three stations are angularly arranged 120 from each other.
The machine is operated by rotating one of the turrets. This turret is called the drive turret and is connected to a hydraulic cylinder/free wheel system. The hydraulic cylinder/free wheel system moves the drive turret. Through a group of gears joined in series, the other turrets are also driven with the drive turret so that all of the turrets are cylindrically operated through the three 120.degree.-spaced positions.
In addition to the sequential movement through three 120.degree.-steps, the rewinding station must be driven when it is in the rewinding position. This further driving of the rewinding station is performed by means of a further rewinding motor. The rotation speed of the rewinding motor is adjustable to accommodate the type of tape being rewound. Thus, each rewinding turret includes three shafts corresponding to the three stations. The shafts are rotatably driven by means of the rewinding motor and a toothed or belt (or gear) transmission. Using friction means, the rotation is transmitted to the core-holders. The rotation of the shafts is carried out by disengaging a clutch connected to the rewinding motor and the roll rotation drive shaft and operating an external belt (or spur gear) transmission driven by a second rewinding motor. This causes the rewinding shaft to rotate.
When the rewinding shaft is joined to the belt transmission (or gear series) through a pair of gears external to the turret, it transmits movement to a series of rewinding shafts. Expanding plastic material core-holders for supporting the cores are located on the shafts.
Each core-holder is driven, during the rewinding phase, by a tooth belt and pulley (or a series of gears). One of them is assembled as an idle element on the shaft and locked between a series of spacers introduced on the shaft and driven by the rewinding motor.
When these spacers are joined by friction with the pulley (or gear) they then rotate together with the pulley (or gear) and the rewinding shaft. The torque transmitted by the drive pulley (or gear) is a consequence of the friction produced between the pulley (or gear) and the spacers that lock the same. The spacers are pressed by two springs which are pressed by
REFERENCES:
patent: 2970786 (1961-02-01), Justus et al.
patent: 3848824 (1974-11-01), Van Schijndel
patent: 4611769 (1986-09-01), Orbach
patent: 4715552 (1987-12-01), Matsumoto
duBois Steven M.
Levy Stuart S.
Meccanica Comasca S.R.L.
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