Patent GB-1180571-A (GB)
Title: Hand Held Embossing Tool
IPC: B41J3/39
Filed: 1967-02-07
Abstract: 1,180,571. Selective embossing. TARVEL INDUSTRIES Inc. 7 Feb., 1967 [7 Feb., 1966], No. 5906/67. Heading B6F. A manually-operated, selective embossing tool, comprising embossing dies 44, 46, Fig. 2, which are mounted on a main frame 10 articulated by a pivot-pin 18 to a trigger 16 which is displaceable against the bias of a spring 30 to three different positions, is provided with a slider block 80 having three recesses which are selectively engageable by a pawl 84 and which in conjunction with a boss 92 depending from the main frame 10 and abutments 88, 90 integral with the slider block and co-operating with the boss 92 permits the trigger to be displaced to the three different positions to effect embossing, scoring and cutting of the plastics tape formed by a vinyl tape 94, Fig. 5, and an adhesive backing tape 96. Embossing; index setting arrangements.- The embossing dies comprising a rigid female die 46 and a male die 44 are mounted on a common hub 50 and spaced from each other by a wedge disc 52 such that the dies are drivingly interlocked and aligned by projections 56 on the male die 44 which enter axial recesses in the female die 46. The selected character is embossed by squeezing the trigger 16, whilst the slider block 80 is in the position shown in Fig. 2, such that a boss 66 which is fast with the trigger 16 displaces the male die 44 into embossing contact with the female die 46. Sticking of the embossed tape to the male die 44 is prevented by lugs 54 (Fig. 8), which are integral with the wedge disc 52 and which strip the tape of the male die as it returns to its original position during the downward stroke of the trigger 16. Scoring.-Individual letters, words or sets of words forming a label may be produced without severing them from the tape by scoring, i.e. cutting the tape through the vinyl tape 94, Fig. 5, only and leaving the backing tape 96 intact. For this purpose the slider block 80, Fig. 2, is displaced to a position in which the pawl 84 engages the central notch in the block. Displacement of the slider block also disposes the shoulder 88 under the shoulder 92 and a lug 86 under an anvil 70 which is pivotally mounted on the pin 18 and biased away from its co-operating knife blade 68 by a resilient tongue 78 fast with the main frame 10. When the trigger 16 is squeezed its displacement is limited by the coacting shoulders 88, 92 such that the distance between the anvil 70 and the knife blade 68 corresponds to the thickness of the vinyl tape 94. Cutting.-To sever the embossed portions of the tape the slider block 80, Fig. 2, is displaced to a position in which the pawl 84 enters the left notch and in which the shoulder 90 is opposite the depending shoulder 92 such that squeezing of the trigger 16, which is now limited by the shoulders 90, 92 causes the anvil 70 to be displaced through a distance required to sever both vinyl tape 94 and backing tape 96, Fig. 5, whilst embossing is prevented by the coacting shoulders 90, 92. Scoring and cutting arrangements may be modified by dispensing with the shoulder 88, Fig. 2, and providing the anvil 70a, Fig. 9, with a pair of scoring or cutting surfaces 106, 108 which co-operate with a pivotally mounted knife blade 68a or by replacing the anvil 70 by pivotally mounted anvil 70b, Fig. 10, having a cam surface 118, 120 selectively presented under the knife blade 68 to effect scoring and cutting, respectively, the recess 116 being presented to the knife blade during embossing to prevent scoring or cutting. Web feeding and guiding arrangements; letterspacing arrangements.-The embossing tape which is disposed in a magazine 36 (Fig. 3), mounted in recesses 34, Fig. 2, in the main frame 10, is drawn out of the magazine by a feed roller fast with a ratchet wheel 40 and an idler roller 38 through a central guide in the hub 50 and between the embossing dies 44, 46, when the feed roller is actuated by a feed pawl 42 during return stroke of the trigger following the embossing of a character. The hub 50 is provided with a central recess 64 through which may be removed the remaining end portion of an embossing tape to prevent the latter from fouling the feed of a new length of tape.