Winding – tensioning – or guiding – Convolute winding of material – With coiled supply
Patent
1993-12-02
1996-05-21
Nguyen, John Q.
Winding, tensioning, or guiding
Convolute winding of material
With coiled supply
2425412, 242544, 242DIG3, B65H 1808, B65H 1810
Patent
active
055182003
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a method of producing a coreless toilet paper roll and to the coreless toilet paper roll produced thereby. One of the most popularly used toilet paper holders, at present, is a type which has a pair of side brackets for mounting a detachable supporting bar. Generally, the detachable supporting bar is a metal or plastic hollow tube, in the form of a cylindrical section, having a diameter of about 20 to 35 mm. The most popularly used toilet paper roll is a type which comprises continuously wound or rolled toilet paper upon a paper tube or core onto which the toilet paper has been wound, as shown in FIG. 15. Referring to FIG. 15, the paper tube core C has an inner diameter of about 35 to 40 mm so as to permit it to be mounted to the above mentioned holder by way of the detachable supporting bar.
There has been known a type of coreless toilet paper roll which is made by winding toilet paper such that there is only a small center hole for receiving a thin rigid rod to be attached to a holder, for example, the rigid rod having a diameter of only about 5 to 10 mm or so. However, the present invention is not directed to such a type of coreless toilet paper roll. To the contrary, the coreless toilet paper roll to which the present invention is directed is the more popular type of toilet paper roll, referred to above, having a center hole capable of receiving therein the greater diameter detachable supporting bar as described above. The "core" of "the "coreless toilet paper roll" is merely a hollow aperture in the form of a cylindrical section extending axially through the "coreless toilet paper roll", in place of the above-mentioned paper tube core C (see FIG. 15) which is separate and distinct from the toilet paper itself. The "core" of the "coreless toilet paper roll" has a diameter of about 35 to 40 mm, and is formed by the internal diametrical surface of the "coreless toilet paper roll" of the present invention.
BACKGROUND OF THE INVENTION
In restrooms in public places, which are used by many different people, for example in hotel lobbies, hospitals, schools, and the like, depleted toilet paper rolls are relatively frequently exchanged for new toilet paper rolls, for example, every morning. This task requires the use of both hands, in complicated manipulation, to remove the paper tube cores C of the toilet paper rolls from the holders, to thereafter dispose of them, thus adding discrete elements of labor. Further, the requirement to use paper tube cores requires separate additional material cost, and requires discrete separate additional operations to set the paper tube onto the toilet paper roll winding shaft, prior to winding the toilet paper stock thereon, both of which increase production cost.
It is evident that labor, work steps and production costs can be reduced if paper tube cores are deleted from toilet paper rolls. Therefore, some proposals to produce coreless toilet paper rolls have been tried as follows:
(1) For example, Japanese unexamined patent publication No.5504/1976 and Japanese unexamined utility model publication No.130292/1991 both disclose methods characterized by the toilet paper being directly wound on a winding shaft without a paper tube core, with the winding shaft having a special construction for releasing the wound toilet paper roll. In particular, the winding shaft has movable leaves capable of opening/closing radially by manipulation of air pressure, such that the toilet paper can be wound on the winding shaft directly, while the leaves are expanded, and the wound toilet paper roll can be removed from the shaft by radially retracting the leaves after winding. In the process of winding the toilet paper on the winding shaft, after that shaft starts to rotate, the winding speed is increased to a given rate where it is then maintained. Then, the winding speed is decreased at the end of the winding period, and the rotation comes to a halt when the roll is completed. During this process, the toilet paper feed speed, produced by the p
REFERENCES:
patent: 4783015 (1988-11-01), Shimizu
patent: 4958111 (1990-09-01), Gago
Kaji Kazushi
Watanabe Sukesada
Kaji Seisakusho Y.K.
Kasugaseishi Kogyo K.K.
Nguyen John Q.
Sahr R. Lawrence
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