Patent GB-711565-A (GB)
Title: Improvements in or relating to printing and perforating machines
IPC: B41K3/36
Filed: 1951-07-17
Abstract: 711,565. Selective printing machines. BRAUN, K. J. July 17, 1951 [Sept. 12, 1950], No. 16963/51. Class 100 (4). [Also in Group VIII] Combined printing and perforating machines.-Selective printing and perforating devices are simultaneously settable to print and perforate selective indicia one or more times on a single or multiple tag unit severed from a web which is intermittently fed through the machine, each printing or perforating operation occurring in a different position on the tag and in different machine cycles. The number of tags in each multiple tag unit may be predetermined and the feed is arranged so that a lastcompleted tag unit is fed out of the machine after the feeding of the web is stopped. Keyboards; key-actions, typewheel mechanisms.-In the embodiment shown, the keyboard is arranged as shown in Fig. 2 and comprises an upper row of two groups of six slidable keys 13, 15, a lower row comprising two groups of six keys 14, 16 and a third group of keys 17. These keys effect selectively rotation of type wheels 23, 40, Fig. 10, by means of sliding bars 18, 20 having toothed lower edges 21, 37 which engage teeth 22, 38 in the type wheels 23, 40. There are twenty-four type wheels 23 on a common axis 47 but in order that the two groups of twelve may print on different lines C and D, on the tag, Fig. 16, the type in each group are peripherally displaced from each other. The six type-wheels 40 are on a separate axis 52 for printing on position E on the tag. Setting of perforation pins.-Simultaneously with the setting of the type wheels, code bars 33, 44 are moved over perforating pins 135 so that the respective un-notched parts of the bars are above the appropriate pins and cause them to perforate the tag when it is moved upwardly (see below) for impression. The bars 33 are driven by racks 34, 45 and pinions 36 on shafts 32, themselves rotated by pinions 31 and racks 30, 43 attached to the sliding bars 18, 20. Aligning for impression.-To ensure correct alignment of the type-wheels serrations 24, 41 in the sliding bars 18, 20 are engaged by spring- pressed detents 25. Platen impression arrangements.-The typewheels and the code bars 33, 44 are carried by inner plates 5, 6 above a pin housing 136, 137, Fig. 18, mounted on a plate 141 carried by cross bars 142 attached to main side plates 2, 3. The web of tags T is fed below the type wheels 23, 40, by feeding bars 113, 114, Figs. 9 and 18, which are moved upwardly with a bed-plate 146 carried by a bar frame F to effect impression between the web and the type wheels through an ink-ribbon. The frame F is moved cyclically by arms 153 pivoted at 9 to the plates 2, 3 and rocked by its bifurcated ends which carry rollers 154 contacting a cam 155 on a shaft 97 which rotates once every machine cycle. Strip feeding and cutting arrangements.-The feeding bars 113, 114 are formed with teeth 115, Fig. 9, spaced a tag width apart so as to engage in the notches 112, Fig. 14, formed between individual tags. The bars have a movement in two directions in addition to that associated with platen impression, viz. (i) an opening and closing movement effected by levers 119, 120 and 122, 123 rocked by a follower 126 coacting with a cam 127 on the shaft 97 and (ii) a transverse feeding movement effected by racks 133, 135 and tooth arms 131, 134 rocked by a follower 130 and a cam 129 so that the tags are stepped one tag for each machine cycle. After a number of tags or groups of tags, predetermined by the setting of three counter dials 166, Fig. 11, representing hundreds, tens, and units, a pair of web guides 207, 208 is allowed to pivot anti-clockwise to detach the web of tags T from the feeding bars 113, 114. The counter dials 166 each have a ratchet wheel drive so that they are homed one step after the completion of the operation on each group of tags. Each dial has a disc formed with a notch in the zero positions to receive the end of an arm 172 so that if any dial is away from zero the associated arm 172 is rocked anticlockwise. This, through connecting pin 175 and arm 176, causes a cyclicly reciprocated pawl 179 to be moved, by a pin 178, away from a notched wheel 180 on a shaft 177 carrying four notched discs 181-184 which determine how many individual tags are in each group before they are cut from the web and how many individual tags cause one step of the dials 166. The number of individual tags in each group is determined by a knob 165 which can be set m four positions corresponding to one, two, three or four tags per group; rotation of the knob 165 sets a cam 200 to bear beneath one of four levers 190-193 to which are pivoted four levers 185-188 engaging the notches in the discs 181-184. When the discs are rotated by the ratchet 180 the particular lever 185-188 pivots clockwise each time it rides out of a notch, rocking a crank 195 anticlockwise allowing a notched bar 198 to travel to the left (as shown in Fig. 11) in which position cut-off punches 199, which sever parts 106, Fig. 14, of the web of tags T, are restricted from upward movement as the web is moved cyclicly upwardly by the frame F. Movement of the crank 195 also effects one homing movement of the dials 166 by means of link 223, parts 220, 221, 218, 217 and pawl 216. Detent pawls 224 prevent overrun. When any of the dials 166 are off zero the arms 172 and link 222 cause the bellcrank 195 to pivot clockwise and the cut-outs 203 in the bar 198 are moved over the punches 199. Locating holes.-Holes 226 are punched in the tags T in the first cycle position for the subsequent location of the tag in a machine which decodes the indicia. Ink-ribbon arrangements.-An ink ribbon 55, Fig. 7, is fed over the work between spools 58, 59 one of which in turn is rotated by a pawl 62 or 63 pivoted to a lever 66 reciprocated by a lever 93 rocked about its pivot 94 by a follower and cam 95, 96 on the shaft 97. The lever 66 also carries a toggle arm 86 held in either of two positions by a U- spring 88. The toggle arm 86 engages the Jower extensions of the pawls 62 or 63 to move them out of or into engagement with ratchet wheels 60, 61 according to which spool is to be driven. When one spool is empty, the drive is automatically reversed by the pivoting of the toggle arm 86 caused, when an arm 79 or 89 on a two armed lever 68 or 77 of the empty spool, hooks a finger 100 on the arm 86 ; the reciprocation of the lever 66 then effects pivoting of the toggle arm 86. Detent pawls 83, 84, preventing over-run of the ratchets, are moved out of or into engagement with the ratchet wheels by the pawls 62, 63.