Cutting – Cutting motion of tool has component in direction of moving... – Orbital motion of cutting blade
Reexamination Certificate
1998-08-04
2001-03-06
Rada, Rinaldi I. (Department: 3724)
Cutting
Cutting motion of tool has component in direction of moving...
Orbital motion of cutting blade
C083S649000, C083S949000
Reexamination Certificate
active
06196102
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to the technical sector of apparatus for dispensing cellulose wadding, creped paper towels and towels of similar materials, especially those used for wiping the user's hands, toilet paper and paper napkins.
BACKGROUND OF THE INVENTION
The Applicant has developed several apparatus of this kind, and in particular an apparatus comprising a device for controlling and unwinding the reel of material as described in French patent application 95.01693. This patent described a device for braking the material take-off reel which was associated with the operating cycle of the apparatus involving rotation of the drum of one revolution, this device being hinged relative to the housing while ensuring, depending on whether or not the apparatus is operating, braking-action contact on at least one of the lateral sides of the reel or release of the latter when the drum rotates one cycle.
One of the problems encountered nevertheless remains the dimensions of the reels of material which are obtained from automated production processes. Indeed, the different reels which can be used according to the invention result from the manufacture of a long length of reel which is then cut into units by appropriate tools. On occasions, therefore, due to the equipment used, the transverse cuts of each reel are not performed with the utmost precision, so that when the reel is introduced into the paper dispensing apparatus there may be certain jamming effects or poor operation of the apparatus. This disadvantage is clearly evident when the paper strip is pulled by the user at an angle. Therefore, even when all the necessary precautions are taken in the design of automatic cutting tools, reels of material on occasions present a diameter differential of a few millimeters which affects the proper operation of the apparatus into which they are inserted.
As part of his research, the Applicant has developed different braking devices for reels of material which act laterally against the sides of the reel. Such devices cannot, however, be applied to the invention.
The Applicant has also developed, as part of his previous research on other types of paper-folding apparatus, a device to control the tension of the strip of paper so as to avoid buckling when the operator pulls the paper too hard. Such a device has notably been described in French patent No. 2647048, remarkable in that it comprised a hinged support frame comprising a rocking arm in the front part of the apparatus. This rocking arm is not, however, directly affected by the rotation of the drum of the cutting device so that its simplified function remains the control and absorption of a buckle of length of material when pulled too hard.
SUMMARY OF THE INVENTION
An object of the present invention is therefore to control the rotation of the roll or reel of material in order to overcome the above-mentioned problems. An aim of the present invention is to design a new device capable of controlling the unwinding of the reel of material without being restricted by how the sides of said reel have been cut, and of enabling easy and reliable dispensing of the strip of material.
Yet another aim of the invention is to design a simple system with a low manufacturing cost capable of being inserted, without any particular difficulty, into any single- or dual-roll, folded or unfolded, paper dispensing apparatus.
According to a first aspect of the invention, the folded/unfolded paper towel dispensing apparatus, of the type comprising a housing, a cover, a drum, a cutting device incorporated in the drum, a tensioning device as well as means of actuating and reversing the drum including an eccentric lever and a spring, the upper part of the housing having two flanges capable of accommodating a reel of paper towel, said drum and the tensioning device being secured between the flanges located at right angles to the rear plane of the housing, is remarkable in that it comprises a device for controlling the rotation of the drum, fitted with a shaped lever hinged at its base in opposition to an elastic return means, the upper part of said lever being fitted with a support shaft supporting a pair of freely-rotatable pulleys, and in that the first pulley is associated through a drive belt with one of the means of feeding and tensioning the paper before it is cut, and the second pulley is arranged so as to come into contact with the rear of the reel of material.
The advantages of the invention are clearly evident and the invention is remarkable for its simplicity. An additional advantage resulting from the invention resides in the easy loading of the reel of material. Indeed, when said reel is placed in the apparatus, it comes into contact with the roller pressing behind it, causing said reel to rotate, thus enabling the end of the strip of material to be presented in a plane located towards the drum and tensioning device. This is an additional advantage of interest for the person who loads the apparatus.
These aspects and others will become apparent from the following description.
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patent: 0412169 (1991-02-01), None
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patent: 9111947 (1991-08-01), None
patent: 95 26157 (1995-10-01), None
Hall Melissa L.
Rada Rinaldi I.
Wall Marjama & Bilinski
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