Winding – tensioning – or guiding – Convolute winding of material – Simultaneous winding
Reexamination Certificate
1999-08-30
2001-07-31
Rivera, William A. (Department: 3653)
Winding, tensioning, or guiding
Convolute winding of material
Simultaneous winding
C242S571200, C242S576100
Reexamination Certificate
active
06267318
ABSTRACT:
This invention relates to winding apparatus for winding tapes, cords and so on onto cores mounted on a drive shaft.
Typically elongated members such as paper, tape, cord and the like are wound on paperboard, plastic or other material cylindrical ring cores. These cores are mounted on a common drive shaft. As a result, problems arise when the winding tension of the elongated members on the different cores varies. If the tension is too low, the elongated members may be wound too loosely. If the tension gets too high, the elongated member may break. Either condition is not acceptable on a high speed mass production apparatus.
In U.S. Pat. No. 4,026,488 to Hashimoto, for example, cylindrical winding cores are mounted on a plurality core holders and a plurality of friction collars are mounted alternately on a single hollow shaft under axial pressure. Each of the collars is allowed to e axially moved and constrained in rotation and each of the core holders has a radial expansible means which are radially expanded by an air pressure supplied to a hollow shaft to come into pressure engagement with the inner surfaces of the cylindrical winding cores on the core holders. Catch buttons are used with a leaf spring to return the catch button to its retracted position when pressure is lost. When pressure is applied to a pressure chamber, the leaf spring and expansible means cooperate to push the catch buttons outwardly to grip a core. The expansible means is a radially expansible elastic half tube and responsive to pneumatic pressure applied to a pressure chamber. Pressure is applied axially to couple the T-shaped collars for rotation which pressure is changed to change the magnitude of the axial pressure applied from a shaft end. This is a relatively complex and costly apparatus.
In U.S. Pat. No. 2,215,069, spindles are disclosed for rolls to be wound on cores with a uniform grip. Disclosed plugs may be thrust outwardly into engagement with a core by means of a pressurized air inflatable tube encircling an inner shell and bound thereto by bands. When the tube is inflated the plugs are pressed outwardly and apply a pressure against the core inner wall to provide a compact winding and uniform tension.
U.S. Pat. No. 2,849,192 to Fairchild discloses a core engaging shaft. Fluid pressure is applied to a diaphragm and bulge it outwardly to grip a core.
U.S. Pat. No. 3,006,152 to Rusche discloses a pile driving mandrel.
U.S. Pat. No. 3,053,467 to Gidge discloses an expansible shaft employing fluid pressure. Self retractable gripping elastomeric members are mounted along an inner face of an outer shell, each with a radially extending portion. The shell is rigid and perforated with radial passages each receiving a member radial portion. Pressure deforms the members radially outwardly in the passages and project beyond the shell to increase the overall diameter of the shell. An inner inflatable container forms an elongated chamber with the inner face of the shell. The container is inflated to distort the buttons and cause the buttons to extend from the shell.
U.S. Pat. Nos. 3,127,124, 4,220,291, 4,332,356 and 4,953,877 disclose chucks and apparatus related to winding tape and similar products on cores. Many of the above patents relate generally to providing plugs which radially extend outwardly for gripping a core. The problem as recognized by the present inventor with these apparatuses is that while the plugs are intended to provide uniform tension on the strips, tapes and so on being wound by gripping the cores with the plugs, there is still present a problem of lack of uniform tension on the strips and so on in many instances. Such lack of uniform tension may result in breakage or loose windings as discussed above.
Apparatus for securing a plurality of cylindrical winding cores on a winding drive shaft during winding of elongated elements at differential winding rates on a corresponding core according to the present invention comprises a hollow cylindrical mounting ring member defining a rotation axis and for releasably mounting a first core thereon and adapted to be rotationally slidably secured on a received drive shaft at a mounting member drive shaft interface surface, the mounting member having a plurality of bores extending radially relative to the axis. A button radially movable is in each of the bores. Means are included for radially outwardly displacing the button in each of the bores for gripping the first core mounted thereon. A gripping element is at the interface surface and responsive to applied forces to cause the gripping element to frictionally couple the mounting member to the drive shaft such that the mounting member is rotatably driven by the drive shaft at a speed or torque corresponding to the magnitude of the friction value.
In one aspect, the cylindrical core mounting member has a first annular groove in the interface surface, the gripping element comprising a first resilient pliable material in the first groove and which element in response to the applied forces grips and couples the drive shaft to the mounting member while simultaneously sealing the interface between the mounting ring member and the drive shaft.
In a further aspect, fluid passage means are in the mounting member for receiving applied pressurized fluid and for applying the received pressurized fluid to the bores for radial outward displacement of the corresponding buttons and for applying the pressurized fluid to the first gripping element for applying radial inward forces to the element for friction and sealing engagement with the drive shaft.
In a further aspect, the fluid passage means comprises a second annular groove in the interface surface and at least one aperture in the mounting member and in fluid communication with and corresponding to each bore and the second annular groove, the second groove for fluid coupling the bores to a source of the pressurized fluid through the at least one aperture.
In a further aspect, a third annular groove is in the mounting member interface surface in fluid communication with the at least one aperture for receiving the applied pressurized fluid, the third groove including a second resilient pliable gripping element which is responsive to pressurized fluid created forces thereon for gripping and coupling he drive shaft to the mounting member.
In a further aspect, the gripping element comprises an elastomeric ring.
The gripping element preferably is adapted to frictionally engage the mounting element and drive shaft at corresponding settable friction values, the values of the friction corresponding to the pressure value of the pressurized fluid.
The friction coupling of the mounting member to the drive shaft is preferably such that there is rotational slippage between the mounting member and drive shaft.
In a further aspect, the fluid passage means comprises further passages fluid coupling each of the bores to the first and third grooves.
In a further aspect, there are passages so positioned and responsive to an applied pressurized fluid to create the applied forces so that the gripping elements are forced radially inwardly toward the received drive shaft.
Means are provided in a further aspect for setting the value of the applied forces.
As a result, the drive shaft is coupled to each mounting member for independent rotation of each mounting member with a settable coupling friction force and thus each core by a frictional engagement. The tensile load on a given core determines the degree of slippage between the drive shaft and the mounting member for that core. Thus, when the tension varies among the different cores, the slidable friction engagement with the drive shaft between the different mounting members provides differential slippage for the higher tension cores permitting slippage and providing more uniform tension. For more loosely wound cores, the additional frictional engagement of the drive shaft to the core provides a driving torque on that core relative to the other cores for increasing the winding tension thereon.
REFERENCES:
patent: 2215069 (1940-0
Carella Byrne Bain Gilfillan
Convertech, Inc.
Gilfillan II John G.
Rivera William A.
Squire William
LandOfFree
Differential winding rate core winding apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Differential winding rate core winding apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Differential winding rate core winding apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2488032