US 4,011,779 AGranted

Apparatus for cutting an elongate member of arbitrary length into shorter sections of predetermined lengths

OwnerGudbrand Gunnarson Berginventor

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Abstract

Apparatus for cutting elongate members of arbitrary length, for example, cants or boards, into shorter sections of predetermined like or unlike lengths, so that each material length is utilized to the maximum with the least possible waste, is provided with a plurality of abutments which may be guided in and out of the direction of travel of the material to determine the length of the different shorter sections. The material to be cut is measured longitudinally while it is advanced towards the cutting element by means of an automatic measuring device which transmits pulses via a programming device which determines the lengths into which various material lengths are to be cut in order to give the least possible waste. The programming device controls the abutments which determine the length of feed of the material in the direction towards the cutting element.

Claims8

Dependent claims

An apparatus for cutting an elongate member of arbitrary length into shorter sections of predetermined respective lengths, comprising a cutting element, means for advancing the elongate member past the cutting element, a plurality of abutment members located at different positions forward of the cutting element, operating means whereby the abutment members are selectively brought into and removed from the path of movement of the elongate member, a plurality of sensor devices arranged at equally spaced intervals to the rear of the cutting element for sensing the length of the elongate member that is to the rear thereof, the programmable means connected between the sensor devices and said operating means to determine which of said abutment members is brought into the path of movement of said elongate member, and thereby the length of the elongate member that is forward of the cutting element, in dependence upon the length of the elongate member that is to the rear of the cutting element;

and wherein the means for advancing the elongate member comprise a member engaging the rear end of the elongate member, and the apparatus further comprises an electrical conductor extending parallel to the path of movement of the elongate member at the rear of the cutting element and a contact member engaging the rear end of the elongate member and slidably connected to said electrical conductor and engaging the sensor devices as the elongate member is advanced thereby to indicate the position of the rear end of the elongate member.

An apparatus for cutting an elongate member of arbitrary length into shorter sections of predetermined respective lengths, comprising a cutting element, means for advancing the elongate member past the cutting element, a plurality of abutment members located at different positions forward of the cutting element, operating means whereby the abutment members are selectively brought into and removed from the path of movement of the elongate member, a plurality of sensor devices arranged at equally spaced intervals to the rear of the cutting element for sensing the length of the elongate member that is to the rear thereof, and programmable means connected between the sensor devices and said operating means to determine which of said abutment members is brought into the path of movement of said elongate member, and thereby the length of the elongate member that is forward of the cutting element, in dependence upon the length of the elongate member that is to the rear of the cutting element;

and wherein each sensor device comprises a light source having a narrow output light beam directed towards a surface of the elongate member to illuminate a small area thereof, and a light detector having a narrow collection cone arranged to receive light reflected from said surface of the elongate member, the collection cone and the light beam crossing one another so that light of the light beam is reflected from said surface and is detected by the light detector for only a limited range of positions of said surface.

Dependencies are inferred from the claim text.

Facts

Application: 05/681,887Filed 30 Apr 1976 · continuation in part
Priority: NO 738361 Mar 1973
Granted: 15 Mar 1977
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

B26D 5/34
Having the cutting member controlled by scanning a record carrier: scanning being effected by a photosensitive device
B23Q 16/001
Equipment for precise positioning of tool or work into particular locations not otherwise provided for: stops, cams, or holders therefor
B26D 5/00
Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out
B26D 5/38
Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by…