Patent GB-1187431-A (GB)
Title: Method of and Apparatus for Preparing and Separating Labels from a Continuous Web
IPC: B41M3/00
Filed: 1967-01-26
Abstract: 1,187,431. Separating printed labels from a continuous web. NEW JERSEY MACHINE CORP. 26 Jan., 1967 [28 Jan., 1966; 26 May, 1966], No. 4019/67. Heading B8F. [Also in Divisions B4 and G4] Labels are printed on a continuous web in a repeating pattern, the pattern comprising a number of abutting or closely spaced labels, e.g. three abutting labels 42<SP>1</SP> in pattern 40, Fig. 10, whilst the rest of the labels in the pattern are spaced by equal increments, e.g. labels 42 and increments 44. There may be only one increment in the pattern. The invention relates to a labelling machine for use with such a web of labels and including means operable to cut the individual labels from the web. For this purpose, the web is formed with control elements, i.e. marks or characters recognizable by optical or other means. In Fig. 10, for example, the trailing edge of each label carries an element 46, whilst each increment 44 is preceded by an element 47. The machine is provided with a scanning device for recognizing the elements and generating signals in response thereto, the signals being used to control webfeeding means and web-cutting means to ensure the desired cutting of both the abutting labels and the spaced labels from the web, as well as the elimination of the spacing increments. In the machine shown in Fig. 13, a web, e.g. of the form shown in Fig. 10, is withdrawn step-bystep from a roll 78 by a driven roll 122 and an associated roll 123, the latter being supported by linkage 125-127. When the scanning device 48 recognizes a control element 46 on the web, a signal is generated, amplified in a power box 70 and used to energize a solenoid 71 to withdraw roll 123 from operative association with roll 122 and thus stop the feed of the web. A knife 35 is now operated and combines with knife 36 to sever the leading label 49, Fig. 10, from the web. The feed of the web is then restarted. Knives 35, 36 are spaced along the web from the scanning means 48 by a distance equal to the length of pattern 40. When the scanning device 48 recognizes an element 47 on the web, the resultant signal is used to energize a solenoid 110 to disengage a latch 105 from a knife 37, the latch normally serving to render this knife non-operable. Knife 37 is joined by a spring 112 to knife 35 so that, with latch 105 released, knives 35, 37 operate simultaneously, when the next element 46 is recognized (knife 37 co-operating with a knife 38) to sever both the leading label and an increment 45 from the web. The distance between the two sets of knives 35, 36 and 37, 38 is manually adjustable by a micrometer device 104 in accordance with the width of the increments. Means, Figs. 14- 17 (not shown), may be provided for sucking severed increments away from the region of the knives and these means may work in conjunction with a vertically-movable web support (not shown) located between knives 36 and 38. The severed labels are applied via transfer device 93-94, rotating cylinder 79 and rotating drum 77 to bottles 75. The drive to the driven, web-feeding roller 122 is through a reciprocating rack 119 and pinion 120, roll 122 rotating in the opposite direction to the web-feeding direction during periods of web-dwell, i.e. when roll 123 is raised. The machine may include an imprinter 50, Fig. 10, operable to print additional information on the same area 51 of successive labels. The signal generated by the scanning device and utilized to stop the feed of the web may also be utilized to operate the imprinter. The control elements may be in the form of punched holes, or printed indicia visible under either ambient light or light of a special wavelength, e.g. ultra-violet. The ink used for printing the indicia may be magnetic, luminescent, fluorescent or phosphorescent. The scanning device may be optical-electrical, e.g. a photo-tube, Fig. 12 (not shown), or magneticelectrical. Fig. 19 (not shown). Further control elements may be provided on the web, e.g. on the increments 44, Fig. 18 (not shown), and positioned according to a predetermined code to indicate the product, for which the labels are intended. Further scanning devices for detecting these further elements and for thus verifying that the correct labels are being fed through the machine are arranged, in the event of their not detecting correctly positioned elements, to either stop the machine or to operate a light- or sound-warning device. Alternatively, in order to verify that the correct labels are being used, an electronic device for scanning an area of each label may be provided, this area then being compared with that of a master label in a further electronic device. If any difference between the two areas is detected, the machine is stopped and/or the warning device operated. Means, Fig. 21 (not shown), may be provided for marking any labels found to be incorrect. Electronic counters may also be provided for counting the total number of labels scanned and the number found to be incorrect.