FR2691395A1 - Cutting tool to cut decorative materials, at variable bevel angle - has shaped stop, which can be raised or lowered in slot, to provide adjustment to bevel angle - Google Patents

Abstract

The cutting device consists of a blade carrier (1), with a cavity and stud (2) to hold the blade (3). The blade clamp (4) is secured in place by a moulded, threaded button (5). A slot (6) is provided to allow adjustment to the position of the stop (7), which is used to determine the cutting angle. A finger rest (8) allows cutting to be carried out with a clear view. The stop (7) may be raised or lowered, within the limits of the slot (6), after releasing the screw, to determine the angle of cut, which can vary between 40 and 90 degrees. A graduated scale, to indicate the cutting angle is shown along the side of the slot. USE/ADVANTAGE - It enables the cutting of bevelled edges to be carried out simply and reliably and with a variable bevel angle.

Description

 The present invention relates to a very light device for cutting soft to semi-hard materials with a variable angle bevel.

The cutting blade is a commercial universal replacement blade. The set is very light, the size of a common "cutter" and does not require other bulky accessories.

 Until now, for decoration work such as framing for example, the tools used to cut bevel are quite bulky and of impractical use. Need for a special rule on which or against which the cutting tool is moved. The cut is not carried out in direct reading, that is to say on the cutting edge but at a few centimeters and sometimes even opposite, hence a certain inaccuracy. The depth must be adjusted again with each pass: the cutting surface cannot be regular and flat. The cutting angle is not adjustable, always at 45 degrees.

 The present invention aims to remedy these drawbacks by providing a simple, light tool, convenient to use and inexpensive. An embodiment of the present invention will be described below, by way of non-limiting example, with reference to the 4 drawings annexed practically on a 1/1 scale.

 A trapezoidal blade (3) (commercially available) is placed in the recess provided for this purpose in a blade holder (1). This recess is intended to prevent the blade from moving up and down. The blade is positioned by placing it so that the lug (2) of the recess receives one of the two holes located at its top: it can no longer slide. A blade clamp (4) fixed by a knurled button (5) securely presses the blade into the blade holder (1). The fixing of the stop (7) slides in the light (6) determining the desired cutting angle from 400 to 900. The higher the stop (7) the smaller the cutting angle of the bevel. The lower the stop (7), the greater the cutting angle of the bevel.

 Once the desired cutting angle is obtained, cutting at a bevel with the device according to our invention is as simple as cutting a sheet of paper with a normal "cutter". The tool stands on its own because it rests on three fixed points: the tip of the blade (3), the heel of the blade holder and the contact point of the adjustable stop (7). A stopper is formed with a rule or a rule resting directly on the course. I1 just slide the blade holder along the stopper by pressing more or less strongly on the finger rest (8) depending on the hardness of the material to be cut. Each "pass" cuts over several millimeters in depth without any other adjustment.

The only concern is to apply almost constant pressure. The visualization of the cut slice being direct, the precision is excellent along the cut and much superior to all the other systems in particular at the stopping points because the operator constantly sees the blade well and can control the start of the point of penetration just like the end of contact of the blade with the surface and this whatever the depth reached. A left-handed or a right-handed person will use the device indifferently: it suffices to fix the stop (7) on the other side of the blade holder (1) as well as the finger rest (8).

 To obtain a clean cut with a minimum of pressure while being easy to adjust, the parts of the device according to our invention have optimized dimensions and shapes.

 The device rests on three points, the cutting point of which must move along a ruler: the other two points are of suitable shapes to facilitate gliding.

 The blade holder (1) has a rounded shape. The angle of the blade (in place in the tool) with the surface to be cut must be between 25 and 40 degrees, preferably 32 degrees. The heel of the tool which must slide along a guide must be rounded and chamfered.

 It is to be noted that when the tool works in position 900 the stop (7) is located at the bottom of the apparatus fig. 4 in this position an additional button (9) is placed at the top of the light (6) allowing a better grip of the device.

Claims (4)

 1) Light cutting device characterized in that it comprises 1 blade holder (1) with recess and lug (2) for receiving the blade (3), 1 blade clamp (4) fixed by a knurled button (5), a light (6) in which slides the fixing of the stop (7) determining the cutting angle and a finger rest (8) allowing a cut with direct vision.  2) Device according to claim 1 characterized in that the heel of the blade holder (1) is of rounded shape such that the blade (3) forms with the surface to be cut an angle of 250 to 400.  3) Device according to claim 1 characterized in that the stop (7) can go up or down after loosening in the light (6), thus determining the desired cutting angle, from 400 to 900. A simplified graduation is indicated along light (6).  4) Device according to any one of the preceding claims, characterized in that a left-handed person will use it as well as a right-handed person, he will fix the stop (7) on the other side of the blade holder (1) as well as the rest finger (8).