Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
100 words
A device (1) for programmed spot treatment of a body with a beam (7) of rays, using a lens system (4), in which the point of impact of the beam (7) describes a predetermined pattern on the surface of the body as a result of a movement which the body and the device carry out relative to each other, characterized in that the device has means for maintaining a constant predetermined distance between the centre of the lens system (4) and the centre of the point of impact of the beam (7) of rays with the surface of the body.
Claim 2
Independent Claim
100 words
A device (1) for programmed spot treatment of a body with a beam (7) of rays, using a lens system (4), in which the point of impact of the beam (7) describes a predetermined pattern on the surface of the body as a result of a movement which the body and the device carry out relative to each other, characterized in that the device has means for maintaining a constant predetermined distance between the centre of the lens system (4) and the centre of the point of impact of the beam (7) of rays with the surface of the body.
Claim 3
Dependent Claim
86 words
A device according to Claim 1, characterized in that the means for maintaining a constant distance comprise distance-determining means for determining the distance of the surface of the body from a lens system (4) located between light source and the body; displacement means (11,12,12′,14,14′, 15) for displacing the lens system (4), and control means for controlling the displacement means (11,12,12′,14,14′,15) according to the difference between a set value and the measured value of the distance between the lens system (4) and the surface of the body.
Claim 4
Dependent Claim
21 words
A device according to Claim 1 or 2, characterized in that the distance-determining means are in the form of a scanner.
Claim 5
Dependent Claim
20 words
A device according to Claim 3, characterized in that a scanner of the optical, inductive or capacitive type is used.
Claim 6
Independent Claim
161 words
A device according to any one of Claims 1-4 characterized in that the lens system (4) is accommodated in a housing (5) which comprises, on the one hand, a body scanner which measures the distance from a fixed point on the housing to the surface of the body and, on the other, a lens scanner (16) which measures the distance from a fixed point on the housing to the lens system (4), and electronic means are present in order in an arithmetical operation to calculate from the distance values measured by the scanners the distance between the lens system (4) and the surface of the body, which electronic means can also be used to control the energization of the displacement means (11,12,12′,14,14′,15) for displacing the lens system (4) relative to the housing (5) according to the difference between a preselected set value and the thus measured value for the distance between the lens system (4) and the surface of the body.
Claim 7
Dependent Claim
19 words
A device according to Claim 5, characterized in that the electronic means are in the form of a microprocessor.
Claim 8
Independent Claim
55 words
A device according to Claims 1-6, characterized in that the beam of rays is a laser beam (7), and the device can be used to open perforations in a metal screen printing stencil (3a) which are sealed with a masking agent, and the opened perforations are arranged in groups which together form a predetermined pattern.