Cutting – Means to drive or to guide tool – Cutting tool operative in opposite directions of travel
Patent
1997-11-17
2000-08-22
Rada, Rinaldi I.
Cutting
Means to drive or to guide tool
Cutting tool operative in opposite directions of travel
83614, 83649, 83949, B26D 104
Patent
active
06105481&
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a foil dispenser for storing a web of foil coiled into a roll, and for cutting off and dispensing end sections of the web of foil, according to the introductory part of patent claim 1.
Foils, especially plastic foils, are consumed in large quantities in households and restaurant operations for various purposes. So-called catering foil material is commonly used for covering containers with prepared meals or meal leftovers, or for packaging foodstuffs. Such foil materials are available with different foil thicknesses. In addition, foils are available which are resistant to microwave oven and/or baking oven heat, or which ate particularly suitable for packaging deep-frozen foods. Furthermore, biodegradable foil materials are known, which need not to be incinerated after their use, but which can be composted. For ecological reasons, such plastic foils are to be preferred in any case over aluminum foil, which is used for similar purposes. Aluminum foil is often used only because it is easier to handle. Even though plastic foil as such is appreciated as an extremely practical auxiliary material, problems arise when foil sections are unrolled and cut from a roll of endless foil material coiled in the form of a roll, and these tend to be greater than the problems encountered with the use of the aluminum foil. Cutting of sections of foil material with scissors, as it was done with paper for wrapping sandwiches, which can be viewed as the predecessor of foil or film, is not practical with foil material. Such foils have therefore long been sold in the form of rolls packaged in cardboard boxes, which serve for storing the roll, on the one hand, and which comprise auxiliary means for cutting off sections of the foil, on the other hand. In most cases, such auxiliary means consist of a saw strip in the form of a thin metal strip similar to the saw blade of a metal saw. Such saw strip extends openly exposed along an opening of the box. However, such foil containers are often found to be quite unhandy: the cylindrical rolls of foil or film turn poorly in the boxes. In addition, as the saw strip must not be too sharp so as to avoid injury, it is necessary to pull the outer end of the unrolled foil with relatively much force for separating sections of the foil. This causes the section of foil to be separated to expand or stretch before the foil material finally tears along the saw-like strip. Due to such overstretching of the foil material, the separated foil later curls within the overstretched area. Another drawback of such foil boxes--which are designed as disposable items--is that they lead to relatively large amounts of metallically loaded waste. Relatively thin and thus flexible cardboard material is used in order to keep the amount of waste small. If such boxes are gripped too strongly, deformation is caused with the result that the roll contained in such a box will turn even more poorly.
Therefore, various devices have long been offered that are not disposable products, and which are intended to make the separation of foil sections easier as compared to the separation process described above.
Some of such devices have saw blade strips like the box mentioned above, along which the sections of foil are separated. For example, FR-2 697 822 A1 describes a device with an elastically deformable plastic cover, in which the roll is received. One edge of the plastic cover is designed in the form of a sawblade-like strip. Said device is handy; however, it has various drawbacks: the roll of foil, for example, is not protected, as it is not contained in the interior of a housing. In addition, the device is normally designed only for right-handed people. The manufacture of a reversely designed device is recommended for left-handed people.
Another device with a saw blade strip is the subject matter of EP-0 023 473 A1. This device has a spike for receiving the core of the roll of foil, such spike being supported between two plates. The device can be set up upright with a vertical or horizontal spike or mand
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Rada Rinaldi I.
Schindler Edwin D.
Tran Kim Ngoc
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