Glue dispenser for cigarette making machine

  • Inventors: ATHOS CRISTIANI
  • Assignees: Amf Inc
  • Publication Date: October 24, 1972
  • Publication Number: US-3700141-A

Abstract

Apparatus for dispensing glue for use with a cigarette maker, which comprises a cylinder having an outlet orifice therein, a plunger mounted for slidable movement in the cylinder and operable to dispense glue out said orifice, means coupling the plunger and the cigarette maker for driving said plunger toward said orifice at a rate commensurate with the demand for glue of the cigarette maker, and means coupled to the plunger independent of the cigarette maker for driving said plunger toward and away from said orifice.

Claims

1. Apparatus for dispensing liquids, which comprises: a cylinder having an outlet orifice therein, a plunger mounted for slidable movement in the cylinder, a piston rod affixed to and depending from the plunger, first means coupled to the piston rod for driving the plunger toward the orifice, and second means coupled to the piston rod for driving the plunger toward and away from the orifice, the operation of the first and second drive means on the plunger being cumulative. 2. Apparatus according to claim 1, wherein the piston rod is provided with a threaded portion and the first driving means is coupled to the piston rod by an axially fixed, internally threaded gear threadedly mounted on the threaded portion of the piston rod. 3. Apparatus according to claim 2, wherein the piston rod is provided with an axially extending groove and the second driving means is coupled to the piston rod by an axially fixed gear mounted on the piston rod and having an internal key thereon that is received in the piston rod groove. 4. Apparatus for dispensing glue for use with a cigarette maker, which comprises: a cylinder having an outlet orifice therein, a plunger mounted for slidable movement in the cylinder and operable to dispense glue out said orifice, means coupling the plunger and the cigarette maker for driving said plunger toward said orifice at a rate commensurate with the demand for glue of the cigarette maker, and means coupled to the plunger independent of the cigarette maker for driving said plunger toward and away from said orifice. 5. Apparatus according to claim 4, further comprising: means responsive to the attaining of a predetermined glue pressure in the cylinder for de-activating the independent plunger driving means. 6. Apparatus according to claim 4, further comprising: means responsive to the exhaustion of glue in the cylinder for de-activating the plunger driving means. 7. Apparatus according to claim 4, further comprising: a piston rod mounted to said plunger, and means coupling both of said plunger driving means to said piston rod for cumulative driving of said plunger. 8. A method of dispensing glue for use in a cigarette making operation, comprising the steps of: providing a cylinder with a plunger and an outlet, driving the plunger toward the outlet with at least a first drive means until a predetermined glue pressure has been attained, de-activating the first drive means upon the attaining of the predetermined glue pressure, driving the plunger toward the orifice with a second drive means that is coupled to the cigarette maker, sensing the exhaustion of the glue in the cylinder, and de-activating the drive means upon the sensing of the exhaustion of glue in the cylinder. 9. A method according to claim 8, comprising the further step of: driving the plunger away from the orifice and out of the cylinder after the exhaustion of the glue therein.
United States Patent Cristiani 51 Oct. 24, 1972 [54] GLUE DISPENSER FOR CIGARETTE 3,208,638 9/1965 Frenzel et a1. ..222/333 X MAKING MACHINE 3,259,323 7/1966 Sanders .222/333 X 72 Inventor: Athos crisfiani Bologna Italy 8/I969 BlCkfOl'd el al 3,469,741 9/1969 Bickford et a1. ..222/2 [73] Assignee: AMF Incorporated {221 Fii d; J 30 197 Primary Examiner--M. Henson Wood, Jr. Assistant Examiner-Thomas C. Culp, Jr. [2]] Appl 158d Attorney-George W. Price et a1. [30] Foreign Application Priority Data [57] ABSTRACT July 23, 1970 Italy ..12835 A/70 Apparatus for dispensing glue for use with a cigarette maker, which comprises a cylinder having an outlet 3 orifice therein, a plunger mounted for slidable move- 222/386 ment in the cylinder and operable to dispense glue out [51] Int. Cl ..G0lf 11/06 Said i means coupling the plunger and the [58] Fleld of Search ..222/1, 2, 333, 386 cigarette maker for driving Said plunger toward said orifice at a rate commensurate with the demand for [56] References c glue of the cigarette maker, and means coupled to the UNITED STATES PATENTS plunger independent of the cigarette maker for driving 'said plunger toward and away from said orifice. 1,829,789 11/1931 Dammeyer ..222/333 3,143,393 8/1964 De Seguin ..222/2 X 9, Claims, 1 Drawing Figure PATENTEDnm 24 m2 N VENTOR ATHOS CRLST/AN/ BACKGROUND This invention relates to glue dispenser units and more particularly to glue dispensers used in cigarette making machines to apply a film of glue along one edge of the paper tape that receives the tobacco braid in order to enable the closing and sealing of the tape around the braid to form the continuous rod from which the individual cigarettes are cut. A glue dispenser unit generally comprises means for applying a thin film of fluid glue on an edge of the cigarette paper tape and dispenser means for feeding the glue to the aforementioned glue applying unit. The glue applying means and the glue dispensing means are interconnected by a suitable duct or hose or the like. This arrangement allows the glue applying unit only to be placed in the rod forming area while the glue dispensing unit, which is somewhat larger, to be located in a more suitable or convenient position for the service and/or maintenance thereof. Briefly, the glue feeding means, or dispenser, consists of a cylindrical housing within which a plunger is mounted for slidable movement. The plunger is coupled to the cigarette maker proper to assure a flow of which is proportionate to the cigarette maker rate of production. In the past, this arrangement has involved some inconveniences. More specifically, every time the cigarette maker is started, the machine operator must actuate a handwheel to move the plunger forward in the cylinder to bring the glue to the required distribution pressure. And, every time the cigarette maker is stopped, the glue distribution must also be stopped and this result is obtained by moving the plunger in the glue pot backward by means of the same handwheel. Furthermore, when the supply of glue in the cylinder is exhausted, in order to remove the empty cylinder and replace it with a full one the plunger must be returned to its start position by turning the handwheel. SUMMARY It is accordingly an object of this invention to provide an improved glue supply system. It is a further object of this invention to provide an improved glue dispenser system used. on a cigarette maker. It is a still further object of this invention to provide an improved glue feeding unit coupled to a cigarette maker wherein the feeding unit is responsive to the cigarette maker but operable independently thereof as well. It is a more specific object of this invention to provide a glue dispenser unit for a cigarette maker with dual actuation means, one means being a coupling to the maker and the other be independent thereof. In accordance with these and other objects, an improved glue dispensing unit according to the invention may comprise a cylinder having an outlet orifice therein, a plunger mounted for slidable movement in the cylinder and operable to dispense glue out said oritice, means coupling the plunger and the cigarette maker for driving said plunger toward said orifice at a rate commensurate with the demand for glue of the cigarette maker, and means coupled to the plunger independent of the cigarette maker for driving said plunger toward and away from said orifice. DESCRIPTION OF THE DRAWINGS The single FIGURE of the drawing is a perspective view of a glue dispensing unit according to the invention with parts thereof broken away. DESCRIPTION OF THE PREFERRED EMBODIMENT With reference to the single FIGURE of the drawing, a preferred embodiment of the invention comprises a glue cylinder 1 having a plunger 2 mounted for slidable movement therein and a glue dispensing orifice 101 adjacent the top thereof. The glue is disposed above the plunger 2 and the upward movement thereof in cylinder 1 dispenses glue from the orifice 101. A piston rod or stem 3 having a threaded section 103 and a longitudinal groove 203 is rotatably mounted to the plunger. The plunger 2 is normally moved upwardly in cylinder 1 to dispense glue by a drive chain A coupled to the cigarette maker. Drive chain A includes an eccentric 4 mounted on a driving element of the maker, a connecting rod 5 mounted on the eccentric, the other end of which is connected to a crank, 6. The crank 6 is keyed to a shaft 7a having a toothed wheel 7 thereon that meshes with a second toothed wheel 8. The second toothed wheel 8 is mounted on a shaft 8a having a worm screw 9 mounted on 'the other end thereof that meshes with a helical wheel 10. A threaded section is formed in the inside of the hub wheel 10 and the threaded section 110 is mounted on the threaded section 103 of piston rod or stem 3. The wheel 10 is mounted to the frame of the device with the quantity of glue normally required by the machine and the elements of drive arrangement A are so chosen and sized. In addition, the upward and downward motion of plunger 2 in cylinder 1 can be caused by an actuating mechanism B that is operable independently from the drive arrangement A. Actuating mechanism B comprises a reversible electric motor 11 having an output shaft 11a. A pulley 11b is mounted on output shaft 11a and a pulley 13a is mounted on a shaft 13b mounted in spaced relationship with shaft 11a. A drive belt 12 drives shaft 13b from output shaft 11a. A worm screw 13 is mounted on shaft 13a and meshes with a toothed wheel 14 with helical toothing. Toothed wheel 14 is mounted around stem 3 and is supported in such a way as to rotate about the axis of the stem 3, without moving longitudinally therealong. The toothed wheel 14 includes a hub portion 14a that is provided with an inwardly extending tongue 15 that is mounted in the groove 203 provided in the stem 3 to transfer rotational movement of toothed wheel 14 to the stem. This arrangement results in the actions of the drive arrangements A and B being cumulative. That is, both wheel 14 is rotated faster than wheel 10, and in the op-, posite direction, then the stem and plunger will be driven downwardly. The motor 11 can be coupled to the cigarette maker such that it starts running automatically when the maker is started and both drive arrangements, A and B, drive the plunger 2 upwardly to impose a pressure on the glue in the cylinder. In another arrangement, motor 11 is not coupled to the maker and can be actuated while the maker is off to impose pressure on the glue before the maker is turned on so glue can be dispensed immediately upon the commencement of the making sequence. With either arrangement, when the pressure in the cylinder reaches the pre-established dispensing value, the shaft of screw 13 is submitted to a back pressure, resulting in an axial stress along shaft 13a that counteracts a force along that shaft provided by calibrated spring 16, the purpose of which is to withstand the axial stress resulting from the coupling between worrn screw 13 and helical wheel 14. The back pressure causes a rod 17 affixed to shaft 13a through a mounting disc 17a to actuate a microswitch 18, which is coupled to the circuit of motor 11 to stop the same. When the motor 11 is stopped, the forward motion'of plunger 2 in cylinder 1 will be determined only by drive arrangement A, which is the rate at which the cigarette maker is running. Every time the cigarette maker itself stops, a circuit coupled to motor 1 1 automatically starts the latter running in the reverse direction to move the plunger downwardly in cylinder 1. A suitable timer (not shown) stops the motor 11 when the pressure in cylinder 1 is exhausted. I While the cigarette maker is running, the operator can, by means of a pushbutton P1, run motor 11 in such a way as to increase the glue pressure in the pot, since, as stated. above, the coupling of the mechanism B driven by motor 11 to the stem 3 is additive to the coupling of the mechanism A from the cigarette maker to the stem 3. Conversely, the actuation of a pushbutton P2 causes motor 11 to rotate in such a way as to lower plunger 2 in cylinder 1. When plunger 2 reaches the end of its stroke at the top of the cylinder, a disk or flange 19 integral with the lower end of stem 3 engages a fork 120 which receives the stem 3 between its tines. Fork 120 is mounted on a rod 20 which is mounted parallel to stem 3 and is maintained elastically balanced between two helical positioning springs 220 acting in opposite directions against the fork 120. A crank pin 121 rides in a notch 20a provided in rod 20 and is mounted on shaft 21a driving a cam 21. The engagement of disc 19 with fork 120 causes the upward displacement of the latter and a consequent axial upward sliding of rod 20. This sliding causes an angular rotation of crank 121 whereby cam 21 rotates in such a way as to actuate a microswitch 22 included in a circuit which stops the maker or motor 11. If it is required to substitute the empty cylinder 1 with a full one, the motor 1 l is run to lower the plunger 2 in its position out of the lower end of the empty cylinder. In this position, plunger 2 engages the top free end of rod 20, whereby the rod is caused to slide downward against the action of positioning springs 220 and the consequent rotation of crank 121 causes cam 23 to actuate microswitch 24. The actuation of this microswitch causes motor 11 to stop. The empty cylinder can then be substituted with a full one and subsequently the cigarette maker can be re-started.' A double cylinder and plunger unit can be provided according to the invention, each associated with actuating devices as set forth above. In this embodiment, the depletion of the glue in one cylinder does not necessitate the stopping of the maker. Instead, by providing solenoid-operated couplings on the, respective shafts that drive the eccentrics 4 of the two dispensers involved, the signal from actuation of the microswitch 22 at the end of the upper stroke of plunger 2 can be used to cause the switching of the coupling of the glue applicator from one dispenser to the other. By so doing, it is possible to easily substitute the depleted cylinder of the exhausted dispenser while the maker continues to run fed by the other dispenser. To avoid interferences between the two alternately operating dispensers, non-retum valves could be provided in the delivery ducts of the cylinders. Having now fully set forth both structure and operation of preferred embodiments of the concept underlying the present invention, it may be that various other embodiments as well as certain variations and modifications of the embodiments herein shown and described will occur to those skilled in the art upon becoming familiar with said underlying concept. All such embodiments, variations and modifications as incorporate the spirit of the invention and depend upon its underlying concept are consequently to be considered as within the scope of the claims appended herebelow, unless the claims by their language expressly state otherwise. I claim: 1. Apparatus for dispensing liquids, which comprises: a cylinder having an outlet orifice therein, a plunger mounted for slidable movement in the cylinder, a piston rod affixed to and depending from the plunger, first means coupled to the piston rod for driving the plunger toward the orifice, and second means coupled to the piston rod for driving the plunger toward and away from the orifice, the operation of the first and second drive means on the plunger being cumulative. 2. Apparatus according to claim 1, wherein the piston rod is provided with a threaded portion and the first driving means is coupled to the piston rod by an axially fixed, internally threaded gear threadedly mounted on the threaded portion of the piston rod. 3. Apparatus according to claim 2, wherein the piston rod is provided with an axially extending groove and the second driving means is coupled to the piston rod by an axially fixed gear mounted on the piston rod and having an internal key thereon that is received in the piston rod groove. 4. Apparatus for dispensing glue for use with a cigarette maker, which comprises: a cylinder having an outlet orifice therein, a plunger mounted for slidable movement in the cylinder and operable to dispense glue out said orifice, means coupling the plunger and the cigarette maker means coupling both of said plunger driving means to said piston rod for cumulative driving of said plunger. 8. A method of dispensing glue for use in a cigarette for driving said plunger toward said orifice at a 5 making operation, comprising the steps of: rate commensurate with the demand for glue of the cigarette maker, and means coupled to the plunger independent of the cigarette maker for driving said plunger toward and away from said orifice. 5. Apparatus according to claim 4, further comprismg: means responsive to the attaining of a predetermined glue pressure in the cylinder for de-activating the independent plunger driving means. 6. Apparatus according to claim 4, further comprismg: means responsive to the exhaustion of glue in the cylinder for de-activating the plunger driving means. 7. Apparatus according to claim 4, further comprismg: a piston rod mounted to said plunger, and providing a cylinder with a plunger and an outlet, driving the plunger toward the outlet with at least a first drive means until a predetermined glue pressure has been attained, de-activating the first drive means upon the attaining of the predetermined glue pressure, driving the plunger toward the orifice with a second drive means that is coupled to the cigarette maker, sensing the exhaustion of the glue in the cylinder, and de-activating the drive means upon the sensing of the exhaustion of glue in the cylinder. 9. .A method according to claim 8, comprising the further step of: driving the plunger away from the orifice and out of the cylinder after the exhaustion of the glue therein.

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    US-3931915-AJanuary 13, 1976Micromedic Systems, Inc.Liquid-containing cartridge and a device for dispensing measured amount of liquid from such a cartridge
    US-5865226-AFebruary 02, 1999Tetra Laval Holdings & Finance, S.A.Servo motor driven fill system