DE1057912B - Device for sticking a new adhesive strip shortly before a running adhesive strip is used up at its end - Google Patents

Description

Device for sticking a new adhesive strip shortly before consumption a running adhesive strip at the end of the same. The invention relates to a device for gluing the leading end of a new second pressure-sensitive adhesive strip to the trailing end of a used running first pressure sensitive adhesive tape without interrupting or slowing down the movement of the adhesive tape.

Isalt adhesive tapes are usually supplied in rolls of a specific type Length supplied. If the purpose for which the role is being used is a greater strip length than can be accommodated in a roll or the like, requires, a fresh supply roll must be used after the first roll has run out. Through this there is a loss of time, which is particularly disadvantageous when the adhesive tape is used on a machine that is operating continuously.

The invention therefore aims to create a device with which an unwound supply roll can be replaced by a fresh supply roll can without interrupting the advance of the adhesive tape.

It is known in paper rolls and rotary printing presses that shortly before a strip is used up, a new strip is glued to the end of the strip. In these known devices, the strips to be joined together are not sticky. Pressure sensitive tapes, on the other hand, are usually sticky and immediately adhere to all objects with which they come into contact. the previously known devices for joining non-sticky strips or webs are now not suitable for joining usually sticky adhesive strips, especially when a steady strip movement without stopping or slowing down the Machine for the joining process is desired and when the joining process should be carried out automatically and without the assistance of an operator.

The new device overcomes these disadvantages of the known devices and is characterized by a holder for the known devices the first supply of adhesive tape, a holder for the second supply of adhesive tape, a support on one side of the web of one withdrawn from the first supply stretched length of the first strip, a movable splice roller on the opposite Side of the web, with the splice roller usually at a distance from the support to allow the strip to pass through and on the first strip can be applied while a length of the strip withdrawn from the second supply is between the perimeter of the splice roll and the first strip, and wherein the splicing roll is moved by a device, the actuation of which is effected by unwinding of the supply of the first strip takes place.

Here the connection of the adhesive strips takes place during the movement the strip, so that it is an "on-the-fly adhesive tape splice" acts.

Two embodiments of the invention are described with reference to the drawings. In the drawings, FIG. 1 is a schematic perspective view of a Splicing device for splicing or joining adhesive strips, Fig. 2 is a circuit diagram for the device shown in Fig. 1, Fig. 3 is a schematic representation of the working parts of a modified embodiment, and Fig. 4 is a circuit diagram the device shown in FIG.

A supply roll 11 'of adhesive tape 12' on one side with a usually adhesive, pressure adhesive, or cold adhesive Adhesive is coated, is rotatable on a holder 13 ', which by means of rollers 14 'is mounted on a guide rail 15 and moved along this rail 15 can be. From the supply roll 11 'is one with the adhesive side down pointing adhesive tape length of the adhesive tape 12 'in the direction of arrow 16 to Consumption point led.

At a point slightly spaced from the supply roll 11 ' is a support in the form of a pressure roller 17 below the path of the adhesive tape 12 ' rotatably mounted. On the top or opposite side of the web a splicing roller 18 is mounted on a carriage 19, which is in the vertical Direction can move up and down.

A second supply roll or a replacement roll 11 "of adhesive tape 12 ", the one on one side with a usually tacky, cold-tack glue is coated, lies rotatably on a second holder 13 ", which by means of rollers 14" can be moved along the guide rail 15.

A web length of the second adhesive strip 12 "is taken from the supply roll 11 "withdrawn, led to the roller 18 and around the lower circumference of the roller with the Kldistoffseite directed downwards, bent around so that the front end of the Adhesive tape a distance beyond the point of tangency with the horizontal extends equal to the distance between the peripheries of the splicing roller 18 and the Support roller 17 is. In the device shown, the adhesive strip extends up to the point of tangency with the perpendicular, d. H. up to the 9 o'clock hand position on roll 18.

A lever 21 rotatably mounted at the pivot point 22 carries at its end a small holding roller 23 which is pressed against the splicing roller 18 by the spring 24. to detachably hold the adhesive strip 12 "on the roller 18 until the roller 18 executes its downward movement at the beginning of a splicing process.

After the first supply roll 11 'has been unwound. but before passing of the rear end of the first adhesive strip 12 'under the splicing roll 18 becomes the Slide 19 so far down by means of the device described below moved so that the circumference of the roller 18 rests on the first adhesive strip 12 '. whereby the second adhesive strip 12 "is between the first adhesive strip 12 'and the roll 18 is located. During this downward movement of the roller 18, part of the adhesive tape becomes 12 "unwound from roll 18 so that the leading edge of strip 12" is is located approximately at the point of tangency with the horizontal. The exposed one outwardly facing adhesive side of the second adhesive strip 12 ″ now adheres to the Back of the first adhesive strip 12 ', so that the two adhesive strips together spliced or connected, whereupon the adhesive tape is then removed from the supply roll 11 "is withdrawn and the feeding of the strip to the incense point in the direction of of arrow 16 takes place without interruption.

During this splicing process, the slide 19 is held by a spring 30 pulled down. The upper end of a vertical rod 31 is on the slide 19 attached. the lower end of which carries a cam follower roller 32. those on a cam 33 is present. The cam 33 is usually still and lies with its tip on the cam follower roller 32 so that the rod 31 against the pressure of the spring 30 is held in such a height position that the splicing roller 18 above the Support roller 17 is and a passage of the strip between these two rollers 17, 18 is possible. Half a turn of the cam 33 brings the flat side of the Cam upwards so that the roller 18 can lower itself into the splice position while With the next half revolution of the cam 33, the tip of the cam will turn back in returned to their normal position and thereby the splicing roller 18 for the next Connection process is provided.

Cam 33 is mounted on a rotatable horizontal shaft 36, which is about a just one turn enabling coupling 37 from a continuously rotating Motor 38 is rotated. Clutch 37 is turned on by a solenoid 39. At the When the solenoid is switched on, the cam 33 is rotated by a single rotation.

Switching on the solenoid 39 after unwinding the first supply roll 11 'takes place by means of a release roller 45 which is rotatable on the stationary shaft 46 is mounted and on a lying between the supply roll 11 'and the splicing roll 18 Place with its circumference on the adhesive side of the adhesive strip 12 '.

A vertical shift lever 48 is approximately in its center on the stationary shaft 46 rotatably mounted.

Above the upper free end of the shift lever 48 is a usually open switch 49 set up.

A spring 50 attached to the lower free end of the shift lever 48 pulls the top end of the shift lever clockwise for a momentary touch with the switch 49.

At the front end of the release roller 45 is concentric to this role a disk 51 attached. A second disk 52 facing the first disk 51 and is arranged concentrically to this disk 51, is on the shift lever 48 attached. Between the two disks 51 and 52 there is one soaked in oil Felt existing friction disk 53 supported. The discs are made with the help of a spring 54 pressed together.

The left-hand rotation performed by the trigger roller 45, which is carried out by the adhesive tape moving in the direction of arrow 16 is caused. will transmitted via the friction disk 53 and is sufficient to the upper end of the shift lever 48 to move in the left direction out of contact with the switch 49 and the switch lever 48 to hold in this position.

When the adhesive strip 12 'is running, the switch 49 therefore remains open. Is the supply reel 11 'unwound and is the rear end of the adhesive tape 12' has passed the trigger roller 45 so that this end no longer passes the trigger roller 45 is present, then the leftward pull on the shift lever 48 stops, whereupon the shift lever 48 moved in the right direction by the spring 50 actuates the switch 49 closes so long that the solenoid 39 (Fig. 2) is turned on.

The adhesive strips 12 'and 12 "are then connected in the described manner, and it operates the unwinding of the adhesive tape 12 "from the supply roll 11 ".

With the second adhesive strip 12 "running, the first carriage 13 'is removed by hand from the guide rail 15, and the second carriage 13 "is moves on the guide rail 15 in the direction of arrow 55 into the position which the first sled had previously taken 13 '. A third adhesive strip supply roll is then placed on the guide rail 15 in the position that by then the Slide 13 "occupied. Then a length of strip is taken from the third supply roll peeled off and wrapped around the splice roll 18. so that the front end of the adhesive tape is held by the holding roller 23 in the position in which it is for the next cycle is ready.

The rear end of a supply roll of cold glue tape, d. H. the part of the strip that lies directly on the spool core is often unusable. For example, if the core is made of cardboard, the one with the core takes the part of the adhesive tape in contact when it is pulled away from the core fibers which reduce or completely cancel the adhesive properties of the strip.

It is therefore desirable to cut off this rear end before a new role is attached to this end. According to the invention is therefore close to the strip path between the release roller 45 and the splicing roller 18, a strip cutter available, which works in time coordination with the splicing roller movement.

A fixed knife 57 lies below the reminder of the adhesive tape 12 'between the release roller 45 and the splice roller 18. A movable knife 58, which is located above the adhesive tape web, is at pivot point 59 at the bottom Knife mounted rotatably and works together with this lower knife. A feather 60 pulls up a rear lug 61 of knife 58 to cut the strip.

The projection 61 is controlled by a lever which is rotatably mounted at the pivot point 63 62 and the vertical rods 64 and 65 pulled down, which on the lever 62 to the Pivot points 66 and 67 are articulated.

The upper end of the rod 64 is with the extension 61 of the movable Knife blade 58 articulated.

The lower end of the rod 65 carries a cam follower roller 68 which runs on a cam 69 attached to the camshaft 36. The one to drive the Cutter serving cam 69 is usually held at rest, its tip rests against the cam follower roller 68. so that the rod 65 against the train of the spring 60 is kept so high that the knives 57, 58 in open position.

The already mentioned single revolution of the camshaft 36, the If the cam 33 rotates to make the splice, the cutter also rotates actuating cam 69 to bring the flat side of the cam 69 up, so that the spring 60 can close the cutting device 57, 58, thereby removing the adhesive tape cuts through. At the end of the revolution, the tip of the cam 69 is again in their normal position zurückge leads so that the cutting device opens and is ready for the next cut, in the case of the FIGS. 3 and 4 illustrated embodiments is a supply roll 111 'with adhesive tape 112', the one side covered with a usually tacky, cold-stick adhesive is. rotatably mounted on the spoke of a holder 113, which revolves around the pivot point 114 turns. By means of a retractable pin 115, the can be in the feed position adjusted holder 113 are locked.

A strip length of adhesive tape 112 'is taken from the supply roll 111 'peeled off with the adhesive side up in the direction of arrow 116 and guided.

Is at a point standing at a distance from the supply roll 111 ' a support device in the form of four rollers 117 set up at a distance from each other beneath the path of adhesive tape 112 'in a row parallel to the Strips are rotatably mounted.

A similar group of three spaced splice rolls 118 is arranged on the upper side of the web in a row parallel to the strip. In the illustrated machine, the three rollers 118 are immediately above and below set up opposite the three spaces between the rollers 117 are located. The three splicing rollers 118 are rotatably mounted on a carriage 119, which can move up and down in a vertical direction.

A second supply roll or replacement roll 111 "of strip 112", on one side a coating of usually tacky, cold adhesive Has adhesive material is rotatably mounted on the second spoke of the holder 113.

A strip length of the second adhesive strip 112 "is taken from the supply roll 112 'peeled off and with the adhesive side up to the splicing rolls 118 guided. Then the leading end of that length of strip is temporarily attached to the sections glued to the circumferential surfaces of the roll, which face the path of the first adhesive strip. The preferred "splice position" of the glued leading end of the strip 112 "becomes chosen so that this strip length is parallel in an approximately straight line to the first adhesive strip 112 'and on the peripheries of the rollers 118 only at the tangent points, with the front end of the strip not over the Tangent point with the last roller 118 protrudes.

From the supply roll 111 "is then another length of strip of the second adhesive strip 112 "peeled off. The slack created in this way between the rollers 118 and the supply roll 111 "is temporarily at a stationary Holding fingers 125 tacked on or glued on with pressure.

Such slack reduces tension and tension the adhesive strip and the splice when splicing or joining the adhesive strips.

The rollers 118 can then, for example, their downward movement when Carry out splicing without the described splicing position of the front end of the Adhesive strip 112 "is disturbed or changed.

After unwinding the first supply roll 111 ', but before the rear one The end of the first adhesive strip 112 'has passed under the splice rollers 118. the carriage 119 becomes so far with the aid of the device described below moved downward so that the circumferences of the splicing rollers 118 on the first adhesive strip 112 ' abut and the second adhesive strip 112 "is between these rollers 118 and the first adhesive strip 112 'is located. The adhesive side of the first adhesive strip 112 ' sticks to the back of the second adhesive strip 112 "so that the strips come together are connected, whereupon the further adhesive tape from the second supply roll 111 " is peeled off and the feeding of the adhesive tape in the direction of arrow 116 without Interruption to the point of consumption takes place, the carriage 119 is used for production the splice or junction is moved by a solenoid 130. A vertical one Rod 131, the upper end of which is fork-shaped, protrudes from slide 119 downward. The movement of the solenoid arm when the solenoid is energized 132 in the direction of arrow 133 is via an intermediate shaft 134 and on the Intermediate shaft attached lever arms 135 and 136 for downward movement of the rod 131 used. A spring 137 attached to arm 135 usually holds rod 131 and the carriage 119 in such a high position that the rollers 118 are above the support rollers 117 stand at a distance and put an adhesive strip between the rollers can.

The actuation of the solenoid 130 after the first supply roll has been unwound 111 'takes place by means of a release lever 145, which is attached to one below the movement track of the adhesive strip 112 'set up switch box 144 is rotatably mounted and the free end of which rests against the non-adhesive underside of the adhesive strip.

The end of the lever 145 carries a roller 146 which is on Adhesive tape is present. A small horizontal shaft 147 is rotatably mounted in the switch box 144. The release lever 145 is attached to that part of the shaft 147 from the control box extends to the outside. A shift lever 148 (Fig. 4) is within of the switch box attached to the shaft 147. The shaft 147 becomes clockwise pulled by a spring (not shown) that pulls levers 145 and 148 into one usually holds a raised position.

On the downward movement of the lever 148, a usually closed one becomes Switch 149 open.

The adhesive strip 112 'holds the trigger arm 145 and, consequently, also the switch lever 148 down so that the switch 149 while the adhesive tape is running 112 'is open. After the supply reel 111 'has been unwound, the contact stops between Adhesive tape 112 'and release lever 145, whereupon the lever arms 145 and 148 so that switch 149 closes and solenoid 130 is energized.

It then follows the connection of the adhesive strips 112 'and 112 "in FIG already described way. The adhesive tape 112 "is taken from its supply roll is removed and the power switch 150 is manually opened so that the splice rollers 118 can resume their raised normal position.

When the second adhesive strip 112 "is peeled off, the locking pin 115 pulled out, the supply roll disc 113 turns 1200 in the direction of the arrow 153 rotated by the operator and the pin 115 is reinserted into the locking hole. The second supply roll 111 'is then in the withdrawal position that was previously has been taken by the first supply roll 111 '. The third supply roll 111 '' ' is then in the role previously occupied by the supply roll 111 ", and a fourth roll is put on. namely in the reverse position, the had previously taken the third supply roll 111 "'. One strip length becomes then withdrawn from the third supply roll and in the spliced position on the underside the splice rollers 118 as well as glued to the finger 125 is the second Supply roll 111 "in the withdrawal position, then the adhesive strip 112" is on the release lever 145 and opens the switch 149. while the power switch 150 is activated by the operator is closed. The machine is then ready to work in the next cycle.

The back section of a supply roll of cold glue tape, d. H. the part of the strip that lies directly on the core on which the coil is placed is wound up. is often unusable. For example, if the core is made of cardboard, takes the part of the adhesive tape in contact with the core when it is peeled off fibers from the core, which reduces the adhesive strength of the adhesive tape or is completely canceled.

It is therefore desirable to cut off this rear end. before a new role is struck with this ending. According to the invention is therefore close to Strip web between the release lever 145 and the splicing rollers 118, a strip cutting device built-in. which works in time with the splice roller movement. A fixed knife 157 lies beneath the path of adhesive tape 112 'between Release lever 145 and the rollers 118. A movable knife 158 that is above the Adhesive tape web is arranged is rotatable in pivot point 159 on the lower knife stored and cooperates with this lower knife. A handlebar 160 extends from a rear attachment of the knife 158 to an arm 161 which is attached to the intermediate shaft 134 is attached.

There can be various changes and substitutions by equivalent Parts are made. All of these changes fall within the scope of the claims.

For example, the first adhesive strip 12 'shown in the illustration sticky side down, sticky side up be arranged horizontally. In this case, the front section becomes the second Adhesive tape 12 "is placed around roll 18 with the adhesive side facing inward.

The adhesive tape is consequently attached to the splice roll 18 by his own adhesive strength held. so that the Rolle23 can be omitted. Will be the first adhesive tape 12 'arranged so that its adhesive side is directed upwards, then the Release roller 45 not below the web of adhesive tape 12 ', but preferably located above the web of adhesive tape 12 ', the position of the switch 49 and the shift lever spring 50 is changed accordingly.

The support device can be any support beam, must so it does not have to be the roller 17 and / or does not have to be immediately below the splicing roller 18 as long as they are a support or support for the adhesive tape 12 'forms when the newly applied or supplied adhesive tape 12 "is adhesively attached the strip 12 'is pressed.

The positions of the devices shown are indicated so that the normal path of the strip from the supply roll over the splicer takes place in a horizontal plane, but the device can also in other positions be set up so that they can carry out the respective work. The expressions "Horizontal", "above", "below", "perpendicular" etc. are therefore only to be understood relatively and are not to be regarded as a limitation.

The device 165 shown in FIG. 3 is one example Use for an adhesive tape in which the strip is an uninterrupted one Should have length and is advanced without interruption. The device 165 is used for the manufacture of fuses for explosive charges. The adhesive tape will be the one The end of the device is supplied as a flat strip. The strip is then in a Shaped V-shaped gutter. Gunpowder or other quick burning powder is poured into the moving gutter via a funnel.

When passing through the device 165, the two upper Sides of the channel-shaped strip folded over one another, so that a closed The result is an endless tube in which the powder is enclosed.

Claims (9)

CLAIMS: 1. Device for gluing the leading end a new second pressure sensitive adhesive tape to the trailing end of one spent running first pressure sensitive adhesive tape without interruption or slowing down the movement of the adhesive tape, characterized by a holder (13 ', 113) for the first supply of adhesive tape, a holder (13 ", 113) for the second Adhesive tape supply. a support (17, 117) on one side of the track one of the extended length of the first strip withdrawn from the first supply, a movable one Splice roll (18, 118) on the opposite side of the web, with the splice roll usually at a distance from the support, around the passage of the strip to enable, and to the first strip (12 ', 112') can be applied, while a from the second Stock peeled length of strip (12 ", 112") is between the perimeter of the splice roll and the first strip, and wherein the splicing roller is moved by a device (38, 130), the actuation of which is carried out by The supply of the first strip is unwound. 2. Apparatus according to claim 1, characterized in that of the second strip (12 ") withdrawn from the second supply roll (11") in the splicing position between the periphery of the splice roll (18) and the first strip (12 ') by intermittent Gluing the second strip (12 ") to a holding roller (23) is held. 3. Apparatus according to claim 1, characterized in that of the second strip (112 ") withdrawn from the second supply roll (111") in the splicing position between the periphery of the splice roll (118) and the first strip (112 ') by temporary Adhering the second strip (112 ") to the splice roll (118). 4. Apparatus according to claim 1, 2 or 3, characterized in that that the support device consists of one roller or of several rollers (17, 117). 5. Apparatus according to claim 4, characterized in that the support rollers (117) are spaced apart and that the splicing rollers (118) are spaced apart from each other, with the splice rollers (118) immediately opposite the between the support rollers (117) are existing gaps. 6. Device according to one of claims 1 to 5, characterized by a trip device (45, 145) which is in contact with the withdrawn length the first strip (12 ', 112') between the splice roll (18, 118) and the supply roll (11 ', 111') and that between the Trip device (45, 145) and the Splicing roller moving device (38, 130) is a connection (Fig. 2, 4), when the contact between the strip and the triggering device is removed is working. 7. Apparatus according to claim 6, characterized in that the Release roller (45) forming the release device in circumferential contact with a withdrawn one Length of the first strip (12 ') and a lever arm (48) coaxial with the release roller (45) is rotatably mounted, a friction disc (53), which the lever arm (48) pulls in one direction when the release roller (45) is moving Strip (12 ') is rotated. and a spring (50) which the lever arm (48) in the opposite direction pulls when the contact between strip and trigger roller has been canceled, the movement of the lever arm (48) in the opposite Direction the connection (Fig. 2) actuated. 8. Apparatus according to claim 4, characterized in that the triggering device has a rotatably mounted release lever (145) which is attached to the withdrawn length of the first strip (112 ') is laid and touches the strip, and that the movement of the lever (145) when the contact between the strip and the release lever is released serves to operate the connection (Fig. 4). 9. Device according to claims 1 to 8, characterized by a cutting device (58, 158) located in front of the splicing roller (18, 118), which is shown in timing with the movement of the splice roller (18, 118) works to the Cut off the end portion of the first strip (12 ', 112'). Considered publications: German Patent Specifications No. 753 546, 870 859.