Cutting – Cutting motion of tool has component in direction of moving... – Orbital motion of cutting blade
Patent
1997-05-27
1999-08-17
Rada, Rinaldi I.
Cutting
Cutting motion of tool has component in direction of moving...
Orbital motion of cutting blade
83337, 83649, 225 96, 225106, B26D 156, A47K 1036
Patent
active
059377186
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to the field 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
Paper towel dispensers with automatic cutoff devices in which the potential user seizes the paper band to obtain a length of paper are known in the art. For example, applicant has developed numerous paper dispensing apparatuses, such as those in French patent applications 93/04082, 93/14609, 94/04399, and 94/09924.
In these dispensers, the paper band is cut across its entire unfolded width, thus retaining its original width. The above described dispensers require a reduced number of parts, thereby allowing rapid field installation with no special tools. One particular variation dispenses cut paper in a folded form.
This dispenser comprises a housing featuring lateral flanges which permit the rapid drum installation. This dispenser's paper cutoff device and a tensioning device press down onto the drum. Both parts lock in position automatically when pressed home, thereby causing the paper band fed from a reel located in the upper housing to be tightened.
In the above-mentioned patents, the knife holder support is fixed on the lateral flanges of the drum. One end of the knife holder support is fitted with a pinion capable of cooperating with a cam with a plurality of radiating fingers formed on one of the sides of the housing. The cam and pinion cooperate to eject the knife. This pinion is internally adjacent to the flange opposite the drum. The pinion is also in a plane that is offset with respect to the flange in order to allow swivelling and movement of the knife in the different operating phases of the apparatus.
When the apparatus is not being operated (i.e., when a paper band is not being pulled), the knife is in a retracted position in the cavity formed transversely in the drum. The knife is situated on the front surface of the apparatus, opposite the protective cover. No component or particular means holds the knife in its recess other than the knife itself. Unfortunately, after removing the cover to load the dispenser, the knife may inadvertently project forward and cut the hand of an operator.
SUMMARY OF THE INVENTION
Accordingly, one object of the invention is to ensure protection of the operator by securing retention of the knife in the cavity formed in the drum without obstructing ejection of the knife during the active paper-cutting phase, and without comprising the accuracy and safety of the gearing mechanism.
Another object of the invention is to improve the quality of operation by silently dispensing the paper strips.
A further object of the invention is to provide each of the above advantages simultaneously.
Additional objects, advantages, and other novel features of the invention will be set forth in part in the description that follows and in part will become apparent to those skilled in the art upon examination of the following of the following or may be learned with the practice of the invention. The objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.
To achieve the foregoing and other objectives, and in accordance with the purposes of the present invention, an apparatus for dispensing paper towels is provided. The paper towel dispenser includes a protective housing; lateral flanges, in its upper part, for positioning of a reel holder; and, in its lower part, a drum devised to accommodate a paper cutoff device, and a tensioning device in contact with said drum, between which the tensioned material to be cut is threaded. The paper cutoff device is hinged relative to the drum to ensure cutting of the paper band pulled by the user. A means of actuating and reversing during rotation of the drum is included. In addition, a protective cover that is positioned and hinged at the base of the housing, and fixed
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Ashley Boyer
Rada Rinaldi I.
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