US2873719A - Conveying and gluing apparatus for filter cigarette tip wrappers - Google Patents

Description

Feb. 17, 1959 B. SCHUBERT 2,873,719

CONVEYING AND GLUING APPARATUS FOR FILTER CIGARETTE TIP WRAPPERS Filed March 7, 1956 United States PatentO :CON VEYIN G AND GLUENG APPARATUS TOR :FILT'ERCCIGARETTE TIP WRAPPERS Bernhard Schubert, Hamburg-Basel, Germany,.assignor to "Kurt Korber & -Co. K.-G., Hamburg-Eerge'dorf, Germany This invention relates generally toa conveying and glue coating apparatus .for paper strips or .the likeused in wrapping the tips of filter cigarettes. In the manufacture .of'filter tip cigarettes one method provides transporting .of the incompleted cigarettes on a drum having circuniferentially spaced .grooves .inits surface. Thesegrooves substantially .parallel the rotational axis of the drum and are of sufiicientlength to accommo'date .two full length cigarettes in endto end relation therein. As is well known,.a filter-tipcigarette comprises a tobacco Ifilled paper Wrapped bodywitha cylindrical filter abutting the end .of the cigarette body. Thefilter and the cigarette body'are joinedby a thin paper band, or any othersuitable type of .band, such as a'thin cork wrapping, which .encircles .the filter and overlaps the cigarettebody to form an integral assembly.

With apparatus of the type referred to thefilter-tips are double the required length forasingle cigarette and are disposedbetween the cigarette bodiesin the grooves of the drum. The paper band which is wrapped about the'filtertip is also oftwice .the required width to span the double-length 'filtentip and overlap the cigarette bodies. Thus a double'length cigarette is formed in the process and by cutting the double lengthcigarette inits middle, through .the center of .the double length vfilter, two completed cigarettes are formed.

The vcigarette'tip wrappers are obtained ,from arollof thin tip wrapping material which is automatically drawn through .agluing and cutting arrangement synchronized with the cigarette carrying drum. 'The paper. strip, which is of twice the width required for .a single wrapper to span the double length filter-tip'vand overlap .thecigarette bodies as described, is drawn .over a conventional ,glue coating roller and thence passes over a cutting roller drum with its glue-coated face up Where it is .cut into suitable lengths to wrap completely about the lfilter-tip an'd'cigarette body. The cigarettes onthe cigarette .carrying drum pass adjacent the cutting roller and respectively engage the adjacent individual tip wrappers which due to the moist glue adhere thereto and are carried with thecigarettes to the tip wrapping mechanism.

Such prior art arrangements operatesatisfactorily as longasoperation is continuous. However, if the operation is interrupted for any reason, the glue coating dries went and uncut portions of the stripbetween the glue coatingstage and the'tip wrapping stage. When the .glue dries, the'paper curls which tends to foul the apparatus. Also the strip tends to stick to the coating roller which may break'the paper Web at that point when the operation-is started up again. 7

Accordingly, it than object of this invention toprovide a conveying and glue coating arrangement for thin strip materials in whichfouling of .the apparatus due to drying' of the glueon coated portions is prevented whenthe coating operation isl'stopped. v

"Morespecifically it is an object hereof to provide a conveying and glue coating arrangement for thin strip materials-wherein provisionis made'for interrupting the coating 'operation *whenthe apparatus is stopped. 7

2 The foregoing statements are merely illustrative of the various aims. and .objectsofthisinvention. Other objects and advantages willbecome apparent from a: studyof the following specification when consideredin conjunction with the accompanying drawing,:in'which=the single figure illustrates a conveying and glue coating apparatus; for thin strip materials, embodying the principles of this invention.

The apparatus illustrated comprises generally ascom veying, glue coating and cuttingmachine generally designated 1 whichproc'ess the filter tip.strip material 2 and transports the coated and cut tip wrappers 3'formed therefrom to aposition where'they are-sequentially engaged and picked up i .by respective cigarette assemblies 4, carried .in grooves .in a .cigarette .transportingadrum synchronized with. the production of the a coated tip'-;wrappers 3.

"In the device 1 the strip 2 passes over a guideprol-lero and then threadsrbetween'a pressure rol1er'-7-and a'drivingroller 8. 'Thepaperroll from whichgstrip 2 isdrawn isnot shown. 'Thev strip 2 then passes overa spool shaped roller 9 and beneath anidler roll 10, threading between a pair of guide rollers -11.and 12 which are mounted'on the end of a lever 13 pivotally mounted about a fixed pivot 14 secured in the support plate 15. Upon leaving the guide rollers 11 and12, the strip passes overa glue coating roll 17 rolling against aroller 18 partially immersed in the'liquid glue in a glue container-20. From theglue coating .roller 17 the strip proceeds about a cut: ting roll '22 driven'by suitable-means (not shown) in synchronism with the strip speed established by drive roller 8, where itis engaged by a synchronized "rotary cutter 23 which forms the individual coated wrappers 3. The coatedstrip engages thelcutter roll 22 with itsglue coated face up and may betemporarily held thereagainst by suction pressure within the drum'inkeeping with conventional practice. As the cut wrappers move fromcutting position with rotation of the cutter roller, they are engaged by the cigaretteasseniblies 4 and adhere thereto to be transported therewith to the wrapping stage .(not shown). t

Lever '13 is shown in operatingposition, whichis the positionin which the strip 2 is heldagainst coating roller 17 to be glue-coated when themachine-is running. 'HOW- ever when the machine is stopped, provision is made to move lever 13 to the position indicatedin-dotted outline, which displaces guide rolls.11 and .12 sufiiciently tolift strip 2 from coating roller 17 toIinterr-upt theglue-coah ing operation. Such lifting of the strip is preferably accomplished prior to the time the .machine :stops-completely, so that all coated portions may-beprocessed int completed tips before the glue coating dries.

Movement of lever'13 is controlled :bya suitable lever arm extension 25 which inturn is controlled by a suitable latch mechanism which isselectivelymanually or electromagnetically operated. Lover .13 is spring loaded to operative position by means of a tension spring 26, in which position latch arm 27 of a bellcrank 28,"pi votally mounted at 28a, engages a catch 29 at the end-of lever arm extension '25 to lock the leverarm in operativeposition. Trip arm 31 of bell crank 28 is engaged by a trip rod 32 secured to a slotted fork 33 on the end ofv plunger rod 34 of an electromagnetic solenoid 135, the coil of which is adapted for energizationat terminals A and B.

The plunger is"shown..in its fully extendedposition and the trip .arm of the bell crank "is biased against "the :end

of trip-rod 32 .by a-tension spring 27a whichmaintains rod .34 is slotted at 36 to slidablyreceive aipin 37 secured in lever arm extension 25. The lost motion provided in 3 the slot is sufficient to allow the latch arm 27 of the bell crank 28 to trip free of catch 29 when the bell crank is actuated by the trip rod 32. Thereafter the upper end of slot 36 engages pin 37 rotating lever assembly 13 to its dotted position to lift the strip 2 from the glue coating roller 17.

This tripping and actuating operation may be accomplished either manually or electrically as required. For example, if it is desired to stop the machine, the solenoid 35 may be energized through suitable electrical interlocking switching of conventional character with the stop switch mechanism of the machine (not shown). Thus depending upon the nature of the control desired or required, the lever 13 may be moved to inoperative position just prior to or exactly with stopping of the machine. If the first of the two suggested operating modes is selected, lever 13 may be moved to inoperative position a short time interval prior to stopping so that the glue coated strip may be cut and wrapped prior to complete stopping. If the second operating mode is desired, the interlocking may provide simultaneous energization of the solenoid when the stop switch is operated to stop the machine.

For manual operation the trip rod 32 is equipped with a handle 38 at its outer end arranged to provide a surface against which hand pressure may be applied to thrust the trip rod 32 downwardly. Manual operation of the trip rod accomplishes the same tripping sequence as the solenoid operation, first rotating bell crank 28 counterclck wise to release latch arm 27 from catch 28 and thereafter engaging the upper end of slot 36 with the pin 37 to move lever 13 clockwise to its inoperative position, which lifts the strip 2 from coating roller 17. Thus the manual feature permits lifting of the strip 2 from coating roll 17 during operation of the machine.

Provision is also made for holding lever 13 in its inoperative position. This is accomplished by means of a spring loaded plunger pin 41 which is spring loaded to released position in lever 13. When lever 13 is in inoperative position, the plunger pin 41 is indexed with a hole 42 in back plate 15. The plunger is then pushed through or into hole 42'against the spring loading and when the lever 13 attempts to return the plunger is prevented from springing back, since it is frictionally engaged with the side of hole 42. The plunger 41 may be tripped to release lever 13 at any time it is desired by applying slight manual pressure to trip rod 32 which works against the spring loading of lever 13 sufiiciently to release the frictional restraint on the plunger pin 41. The plunger spring now biases the plunger to released position freeing lever 13.

If the machine is stopped when the lever 13 is latched 1n inoperative position by plunger pin 41, the upper end of slot 36 in the plunger 42 engages pin 37 and moves the lever 13 slightly counterclockwise before the solenoid plunger stroke is completed. This also releases the plunger pin 41 so that when the machine is started, the lever will automatically return to its operative position.

This description indicates the solenoid is to be energized with stopping of the machine. Usually a solenoid such as 35 is rated for intermittent duty in keeping with its intermittent duty cycle. Under such circumstances prolonged energization, as when the machine is shut down for a protracted period for adjustment, may, damage the solenoid. Thus a suitable time delay switch t me delayed on drop out may be included in the solenoid clrctut to open the circuit a short predetermined time interval after energization- Although but one embodiment of this invention has been illustrated and described, it will be appreciated by those skilled in the art that numerous modifications of this invention may be made, both in its details and in the organization of such details without departing from the spirit and scope of this invention. Accordingly, it is intended that'this disclosure shall be construed only as illustrative of the principles of this invention and not I interpreted in a limiting sense.

The invention is claimed as follows:

1. A conveying and gluing apparatus for the manufacture of glue coated wrappers for filter tip cigarettes wherein the wrappers are cut from a glue coated strip which passes over a suction pressure roller with the glue coated face up which comprises, a glue coating means disposed to engage said moving strip, movable guide rollers between which said strip passes, a pivotally mounted lever mounting said guide rollers for movement between operative and inoperative positions engaging and disengaging said strip with said glue coating means, a spring engaged with said lever and biasing said lever to said operative position to engage said strip with said glue coating means, electro-magnetic means for moving said lever to said inoperative position and to move said strip out of engagement with said glue coating means, and manual actuating means associated with said electro magnetic means adapted to be optionally actuated for moving said lever to said inoperative position to disengage said strip from said glue coating means independently of said electro-magnetic means.

2. A conveying and gluing apparatus for the manufacture of glue coated wrappers for filter tip cigarettes wherein the wrappers are cut from a glue coated strip which passes over a suction pressure roller with the glue coated face up which comprises, a glue coating means disposed to engage said moving strip, movable guide rollers between which said strip passes, a pivotally mounted lever mounting said guide rollers for movement between operative and inoperative positions engaging and disengaging said strip with said glue coating means, a. spring engaged with said lever and biasing said lever to said operative position to engage said strip with said glue coating means, and electromagnetic means conf nected with said lever and arranged to move said lever to inoperative position to disengage said strip from said glue coating means upon energization of said electromagnetic means.

3. A conveying and gluing apparatus for the manufacture of glue coated wrappers for filter tip cigarettes wherein the wrappers are cut from a glue coated strip which passes over a suction pressure roller with the glue coated face up which comprises, a glue coating means disposed to engage said moving strip, movable guide rollers between which said strip passes, a pivotally mounted lever mounting said guide rollers for movement between operative and inoperative positions engaging and disengaging said strip with said glue coating means, a spring engaged with said lever and biasing said lever to said operative position to engage said strip with said glue coating means, electro-magnetic actuating means for rocking said lever to its inoperative position disengaging said strip from said glue coating means, and a manually 0perated linkage connected with said lever adapted to be optionally operated to move said lever to said inoperative position disengaging said strip from said glue coating means independently of said electro-mag'netic actuating means.

4. A conveying and gluing apparatus for the manu-. facture of glue coated wrappers for filter tip cigarettes wherein the wrappers are cut from a glue coated strip which passes over a suction pressure roller .with'the glue coated faceup which'comprises, a glue coating means disposed to engage said moving strip, movable guide rollers between which said strip passes, a 1 pivotally mounted lever mounting said guide rollers for movement between operative and inoperative positions engaging and disengaging said strip with said glue coating means, a latch spring loaded to engage said lever in operative posi tion and prevent movement of said lever to inoperative position, a lost motion linkage connected with said lever and having a part engaging said latch, and electro-mag:

netic means operating said lost motiontlinkagcto move said part to trip said latch and disengage said lever whereupon said lost motionlinkage moves said lever to inoperative position and optional actuating means adapted to be controlled manually independently of said electromagnetic operating means to operate said lost motion linkage and disengage said strip from said glue coating means.

5. A conveying and gluing apparatus for the manuiacture of glue coated wrappers for filter tip cigarettes wherein the wrappers are cut from a glue coated strip which passes over a suction pressure roller with the glue coated face up which comprises, a glue coating means disposed to engage said moving strip, movable guide rollers between which said strip passes, a pivotally mounted lever mounting said guide rollers for movement between operative and inoperative positions engaging and disengaging said strip with said glue coating means, a latch spring loaded to engage said lever in operative position and prevent movement of said lever to operative position, a lost motion linkage connected with said lever and having a part engaging said latch, and electromagnetic means engaging said lost motion linkage and oper able when energized to move said lost motion linkage and said part causing said part to move said latch to disengage said lever whereafter said lost motion linkage moves said lever to said inoperative position.

6. A conveying and gluing apparatus for the manufacture of glue coated wrappers for filter tip cigarettes wherein the wrappers are cut from a glue coated strip which passes over a suction pressure roller with the glue coated face up which comprises, a glue coating means disposed to engage said moving strip, movable guide rollers between which said strip passes, a pivotally mounted lever mounting said guide rollers for movement between operative and inoperative positions engaging and disengaging said strip with .said glue coating means, a spring engaged with said lever and biasing said lever to said operative position to engage said strip with said glue coating means, electro-magnetic and manual actuating means adapted to be optionally actuated for moving said lever to said inoperative position to disengage said strip from said glue coating means, and a spring returned locking device adapted to be moved to a locked position when said lever is in said inoperative position and secured frictionally in locked position due to friction force thereon resulting from said spring bias on said lever biasing said lever toward operative position, said locking device being released by operation of said actuating means to reduce the friction locking force whereafter said spring returned locking device is released.

7. A conveying and gluing apparatus for the manufac ture of glue coated wrappers for filter tip cigarettes wherein the wrappers are cut from a glue coated strip which passes over a suction pressure roller with the glue coated face up which comprises, a glue coating means disposed to engage said moving strip, movable guide rollers between which said strip passes, a pivotally mounted lever mounting said guide rollers for movement between op erative and inoperative positions engaging and disengaging said strip with said glue coating means, a spring engaged with said lever and biasing said lever to said operative position to engage said strip with said glue coating means, electro-magnetic means connected with said lever and arranged to move said lever to inoperative position to disengage said strip from said glue coating means upon energization of said electromagnetic means, and a spring returned locking device manually actuated to locked position when said lever is in said inoperative position and secured frictionally in locked position due to friction force thereon resulting from the bias of said lever biasing spring on said lever, said locking device being released when said electro-magnetic means is energized to further move said lever into inoperative position to reduce the frictional holding force on said locking device releasing said spring loaded locking device.

8. A conveying and gluing apparatus for the manufacture of glue coated wrappers for filter tip cigarettes wherein the wrappers are cut from a glue coated strip which passes over a suction pressure roller with the glue coated face up which comprises, a glue coating means disposed, to engage said moving strip, movable guide rollers between which said strip passes, a pivotally mounted lever mounting said guide rollers for movement between operative and inoperative positions engaging and disengaging said strip with said glue coating means, a spring engaged with said lever and biasing said lever to said operative position to engage said strip with said glue coating means, a manually operated linkage connected with said lever and arranged to move said lever to said inoperative position disengaging said strip from said glue coating means, and a spring returned locking device manually actuated to locked position when said lever is in said inoperative position and secured frictionally in locked position due to friction force thereon resulting from the bias of said lever biasing spring on said lever, said locking device being released by operation of said manually operated linkage to move said lever further into inoperative position which reduces the friction force on said spring loaded locking device permitting said locking device to be released.

Ruau Sept. 8, 1931 Howard Jan. 10, 1950

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