Apparatus for applying stamps to packages arrayed in cartons
CROSS-REFERENCE 
     This invention is an improvement on the invention described and claimed in the copending application of Lewis R. Graziano and Harry V. Kirk, Ser. No. 717,024, filed Mar. 28, 1985, entitled &#34;Stamp Applying Apparatus&#34;, which is incorporated herein by reference. 
     BACKGROUND 
     The standard type of cigarette carton used in the United States holds ten packages of cigarettes arranged in two parallel rows of five. The longest end dimension of each package extends lengthwise of the carton. 
     Many brands of cigarettes are on the market with non-standard arrays of packages in cartons. For example, one brand is sold in the carton with one row of ten packages, with the long end dimension of each package crosswise of the carton. Another brand is sold in a carton of twenty packages located in four rows of five packages each. 
     Cigarette taxes vary considerably between states and between countries. The taxes are usually based on the retail price of the cigarettes. Consequently, the only practical place to apply tax stamps is the premises of a distributor in the state or country where the cigarettes are to be sold at retail. High speed machines are available to apply stamps to cigarette packages in the standard two by five carton, as disclosed in tne copending U.S. patent application of Kimball et al., Ser. No. 587,375, filed Mar. 8, 1984. 
     The cigarettes in non-standard cartons are commonly sold in considerably lower volume than the standard cartons. The non-standard cartons do not fit in the available high speed automatic tax stamp applying machines. The common practice has been for an employee applying tax stamps to packages in a non-standard carton to use a hand iron in one hand and to supply stamps or decals from a sheet with the other hand. The process is slow and tedious. 
     The stamp applying apparatus of the Graziano and Kirk application, identified above, is intended for small volume operations, including those employing non-standard or standard cartons. The cartons are moved through the machine by hand. The stamps are fed, one at a time, by a power actuated feed mechanism. The operation of the stamp feeding mechanism is controlled by a manually operated switch. An elongated guide is provided for the cartons of cigarettes being advanced through the machine. 
     SUMMARY 
     In accordance with the present invention, a cam operated switch is associated with the guide. That switch controls the stamp feeding mechanism so that it is actuated by the movement or the cartons along the guide. Changeable cams accommodate different arrays of cigarette packages in the cartons. A selector switch is provided so that either the cam operated switch or a manual switch may be used to control the stamp feeding mechanism. 
    
    
     DRAWINGS 
     FIG. 1 is a perspective view of apparatus embodying the invention. 
     FIG. 2 is a fragmentary view of the apparatus of FIG. 1, partly in right-hand elevation and partly in section on the line 2--2 of FIG. 3. 
     FIG. 3 is a plan view of the guide and cam means of the present invention with certain parts broken away, and with a second position of the guide and cam means shown in dotted lines. 
     FIG. 4 is a view similar to FIG. 3, but on a larger scale, showing the guide and cam means in only one position, and showing certain other parts of the apparatus in dotted lines, with a carton of cigarettes in position to move through the apparatus. 
     FIG. 5 is an elevation of the guide means shown in FIG. 4. 
     FIG. 6 is a sectional view taken on the line 6--6 of FIG. 5. 
     FIG. 7 is a sectional view taken along the line 7--7 of FIG. 4, with the carton of cigarettes omitted. 
     FIG. 8 is a sectional view taken along the line 8--8 of FIG. 5. 
     FIG. 9 is a sectional view taken along the lrne 9--9 of FIG. 5. 
     FIG. 10 is an elevational view of a typical cam. 
     FIG. 11 is a similar view of another cam. 
     FIG. 12 is a wiring diagram of the electrical circuit of tne stamp applying mechanism. 
     FIG. 13 is a plan view of a cam operated switch and its actuating means, removed from the rest of the apparatus. 
    
    
     DETAILED DESCRIPTION 
     The apparatus of this figure includes a stamp feeding mechanism shown by the reference numeral 1, which is the same as that shown in the copending Graziano and Kirk application cited above and incorporated herein by reference. The stamp feeding mechanism 1 is described herein to show how it cooperates with the carton guiding mechanism and the control mechanism of the present invention. The stamp feeding mechanism 1 is mounted on a base 2, which is intended to rest on a work table. A post 4 is fastened to the base 2. An arm 5 is supported on the post 4 and may be raised and lowered by a screw thread operated by a hand crank at the top of the post. The arm 5 carries an operating head including a frame 8 supporting an electric motor 12 which drives the stamp advancing mechanism to feed one stamp at a time, by means of a one-revolution clutch, as described in the Graziano and Kirk application. The stamps are fed in a strip 16 consisting of individual stamps 17, which are coated on their under side with heat activatable adhesive. 
     The arm 5 also supports, by means of a bracket 20 (FIG. 2), a solenoid 25 which drives an armature 26 connected through a link 30 to an arm 27 fixed on a shaft 28. Another arm 29 fixed on shaft 28 carries a cutter blade (not shown) and a combined presser foot and heater 32. The heater 32 directly engages one of the stamps 17 and holds it against the top of a package 7 of cigarettes. 
     A guide rail 51 of L-shaped cross-section, has a horizontal flange 51a which rests on the base 2, and a vertical flange 51b extending upwardly from the base 2. The guide rail 51 is fastened to the base 1 by means of a locking knob 52 and a pair of detents 49 (FIG. 7). The knob 52 is fixed on a shaft 53 which extends through one of a series of holes 54a in a top plate 54 of the base 2 and thence through an aligned hole in a reinforcement plate 55 fastened to the underside of the plate 54. Under the plate 55, the shaft 53 carries a transversely extending pin 53a. 
     Each of the holes 54a is in the middle of a slot 54b which allows passage of the pin 53a when it is desired to change tne position of the guide 51. The plate 55 is provided with similar slots for the same purpose. 
     Above the flange 51a, another pin 53b extends tnrough the knob 52 and shaft 53 in a direction at right angles to pin 53a. Rotation of knob 52 is limited by a pair of pins 48 extending upwardly from the flange 51a. One of the pins 48 is shown in FIG. 2. The pins 48 are located so as to engage pin 53b and thereby to limit the rotation of knob 52 to about 90° . A spring washer 47 is captured between knob 52 and flange 51a, and biases the knob upwardly so that pin 53a engages the under side of plate 55. 
     By depressing the knob 52 against the spring washer 47, the knob 52 may be rotated to bring the pin 53a into alignment with the slot 54b. The knob 42 may then be lifted to take the shaft 53 and pin 53a out of the plate 54. The guide rail 51 may then be shifted to any other position where tne plate 54 is provided with a hole and slot to accommodate the shaft 53 and pin 53a. A first set of holes 54a, each in a slot 54b, are spaced vertically apart as they appear in FIG. 3. A second set of holes 54c, each in a slot 54d, is provided to allow setting of the guide rail 51 in any of a range of positions (such as the dotted line position of FIG. 3) perpendicular to the position shown in full lines. 
     The detents 49, best seen in FIG. 7, are rounded projections extending downward from screws 46, threaded into the flange 51a. In operation, each detent fits into one of a set of four holes 45. Four sets of holes 45 are provided, two sets for each of the two ranges of positions which the guide 51 may assume. 
     A carton 6 of cigarette packages is placed against tne vertical flange 51b of the guide rail 51, in the position shown in FIG. 4. A track bar 60 (FIG. 5) is mounted above the top of the vertical flange 51b. At each end of the flange 51b, a bolt 62 extends through the track bar 60 and a spacer 63 and is threaded into the upper end of the flange 51b. A slot 60a is defined by the track bar 60 and the top of the flange 51b. The right-hand end of the carton, as shown in FIG. 4, which is the advancing end, engages an arm 57 which is part of a cam means movable along the slot 60a. The cam means also includes a cam mounting bar 64 and a cam 71. A screw 65 (FIG. 8) extends through the cam mounting bar 64 at its right-hand end, as viewed in FIGS. 4 and 5. The inner end of the screw 65 threadedly engages the inner end of the arm 57, which is provided with a flange 57a which slides along the track bar 60 and the flange 51b. The other end of the cam mounting bar 64 is held in place in the slot 60a by a support pin 66 (FIG. 6) having a flange 66a which also slides along the outside of the track bar 60 and the rail flange 51b. The pin 66 has a shank which extends through the slot 60a and is engaged by a screw 67. The cam mounting bar 64 carries a pair of spaced screws 70, shown in FIG. 9. Each screw 70 has a tapered head received in the bar 64, and a shank which is threaded into the mounting bar 64 and extends freely through a cam 71. The opposite end of the screw 70 threadedly receives a knob 69 for holding the cam 71 in place. The cam 71 is provided on its under side with a series of five pins 72 (FIGS. 9 and 10) corresponding to the number of packages of cigarettes found in one row in the particular carton being moved through the apparatus. The cam 71 has a pair of L-shaped slots 71a formed in its lower edge. The stems of the L-shaped slots are adapted to slide over the screws 70 on the cam support bar 64. The crossbars of the slots 71a allow a limited amount of endwise adjustment of the cam 71 on the cam support bar 64, after tne screws 70 reach the upper end of the stems of the slots 71a. The knobs 69 may then be tightened to fasten the cam 71 in place. 
     A spring reel 73 is mounted at the left-hand end of the flange 51a of guide rail 51. A cable 74 is wound around the spring reel and has its free end extending along the cam mounting bar 64. A connector plate 75 (FIG. 7) is fastened in a recess 64a in cam mounting bar 64 and has its lower end projecting downwardly along the flange 51b. The connector plate 75 carries at its lower end a pin 78. The free end of the cable 74 is bent over to engage the pin 78. The spring reel 73, acting through cable 74, biases the cam mounting bar and its assembled parts to the left-hand end of its travel, as shown in FIG. 4 where its left-hand end engages a resilient bumper stop 76 fixed in the spacer 63. A shock absorbing spring 77 may also be provided, having a projecting end which engages a slot 51c (FIG. 5) formed in the flange 51b of the guide rail 51. 
     The pins 72 on the cam 71 engage a roller 79 (FIG. 13) rotatably mounted on the end of an arm 80, which is in turn pivoted on the end of an actuating lever 88 of a switch 81. The lever 88 is flexible, and is in engagement with a button 86 that actuates the switch 81. A tab 80a on the arm 80 engages the end of lever 88 so as to limit the counter clockwise movement of arm 80 on its pivot. Any equivalent alternative arrangement may be used to limit the movement of arm 80. A torsion spring (not shown) biases the arm 80 to the position shown, where the tab 80a is engaging the end of lever 88. As a cigarette package moves into a position aligned with the stamp applying head, one of the pins 72, moving to the right as viewed in FIGS. 4 and 13, engages the roller 79. Since that roller cannot move to the right, the flexible lever 88 is deflected upwardly, pushing the button 86 and actuating the switch 81 from a normally open position to a closed position by actuating the push button 86 (FIG. 13). This causes the stamp applying head to deposit a stamp on the top of the cigarette package and hold it there for a fraction of a second, long enough for the adhesive to be activated. If the operator is moving the carton manually, he stops the motion briefly after each actuation of the stamp applying mechanism to allow time for activation of the adhesive. The operator continues to move the carton of cigarettes along and the switch actuation is coordinated with the package positions by the pins 72 engaging the roller 79. 
     FIG. 11 shows a cam 84 which has ten pins on its under surface and is intended for use with cigarette cartons having one row of ten packages. The cam 84 is shown with T-shaped slots 84a instead of L-shaped slots as in the cam 71 of FIG. 10. The selection of slot shape is a matter of choice, as long as the operator is allowed some longitudinal adjustment of the cam position. 
     The wiring diagram for the apparatus is shown in FIG. 12. A selector switch 82 is manually shiftable between two positions, one of which places the switch 81 in control of the timing relay 83. In the other position, a manually operated switch 34 is placed in control of the timing relay 83. The other parts of the circuit may be the same as those of the circuit shown in the copending application of Graziano and Kirk, Ser. No. 717,024, identified above. 
     FIG. 12--OPERATION 
     A main switch 91 (FIG. 12) is first closed, energizing the motor 12 and a &#34;power on&#34; light 92 in parallel with the motor. The switch 91 also completes a circuit through the heater 32 and a variable resistance 64 connected in series. Variation of that resistance sets the temperature at the heater 32. The resistance 64 may be connected in series with a switch 93, operated by the same manual control that varies the resistance 64. The switch 64 controls the circuit through heater 32. If desired, the temperature at that heater may be controlled by a thermostat, which may be adjusted to set the temperature. 
     After the heater 32 has attained the desired temperature, a carton containing packages to be stamped is moved along the guide 51, so that the leading package moves under the heater and below the projecting end stamp. If the switch 82 is in its automatic position, as shown, then the leading pin 72 on the cam 71 c1oses the switch 81, which completes a circuit for energizing a timer 66 and the relay 83, shown as connected in series. The relay 67 closes front contacts 67a and 67b. Contact 67a completes a stick circuit for relay 67 and opens the circuit through the switch 81, taking that switch out of control. 
     Contact 67b completes a circuit for the solenoid 25, which operates the cutter means to sever the end stamp from the strip. At the same time, the heater 32 is moved downwardly to engage that severed stamp and hold it against the package being stamped. Relay 83 is maintained energized and the heater 32 is held in engagement with the stamp for a time determined by the setting of timer 66, which may be varied by means of a knob 66a, and is usually a fraction of a second. Other equivalent means may be employed to keep relay 83, and hence solenoid 25, energized for a predetermined time, so that the actuation of the solenoid will be maintained for the proper time. Actuation of the solenoid 25 for too long or too short a time should be prevented. Since the switch 81 is controlled manually by movement of the carton, its period of closure is subject to variation. 
     When a carton of cigarettes is being moved through tne apparatus toward the right, as viewed in FIGS. 4 and 13, each pin 72 engages the roller 79. The operating lever 80 is deflected, engaging the button 86 and closing the switch 81. After the carton 6 has reached the limit of its travel to the right, so that all of the packages in one row have been stamped, the carton is removed, allowing the cam means, including the arm 57, the cam mounting bar 64 and the cam 71, to move backward to their original positions. During the backward movement (right-to-left in FIGS. 4 and 13), the pins 72 strike the right-hand side of the roller 71, but the torsion spring allows arm 80 to turn clockwise on its pivot so that the return movement of the pins 72 does not move the arm 80 and actuate the switch 81. 
     The carton of cigarettes is then rotated end-for-end to bring the second row of packages into alignment with the stamps 17 and the process is repeated to apply stamps to the second row.