JPS61132328A - Creasing device for paper web and use thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an apparatus for creasing a paper web comprising at least two interengaging creasing rollers between which the paper web is fed for processing. and the use of the device.

BACKGROUND OF THE INVENTION It is already known in the production of cigarette filters to use creping rollers or grooved rollers for creasing paper webs. The paper web used is wound into long, large storage rolls. During the production of these webs or rolls, it has not previously been possible to reliably prevent the webs from frequently tearing, and therefore they have had to be glued together in the open areas of the tear by means of adhesive strips. However, these bonding parts are difficult because the creping rollers are very precisely manufactured and hardened and therefore very expensive, and have relatively shallow grooved ribs that engage each other with very small gaps. , which is extremely disadvantageous for the paper web to be wrinkled. The core rollers are very sensitive to the adhesive parts and will be damaged if the adhesive parts become wedged between them, thus rendering them unusable. To prevent this, it has been conventional in the past to provide the adhesive portion with an outwardly projecting tag on the end face of the storage roll. When the tagged paper web is crumpled, the creping unit and the web are stopped before the marked adhesive portion passes through the creping device, the adhesive portion is cut out, and the creping roller is activated by the fine adjustment device. The next part of the cut paper web is then reinserted between the separated creping rollers, which are then moved into mutual engagement by a fine adjustment device. It will be returned to match. The creping unit is then accelerated to the desired speed and the distance between the creping rollers is readjusted by the fine adjustment device until the desired degree of creping is obtained.

However, this complex procedure significantly limits the maximum possible raving speed.

OBJECTS AND SUMMARY OF THE INVENTION It is therefore an object of the invention to construct a creping unit which does not have the above-mentioned disadvantages, ie does not require a stop at the adhesive part.

To this end, according to the invention, in the case of a device of the type mentioned at the outset, the creping roller comprises at least two cooperating rollers connected to a drive and configured to engage on both sides of the paper web. two creping rollers that are rapidly adjustable relative to each other between a disengaged position and an adjustable abutment that limits the depth of mutual engagement; at least one of the parts is coupled to a quick adjustment device, the quick adjustment device being arranged in front of the creping roller in the feed direction of the web to crease the portion that should not be wrinkled but should be removed. The creping roller is actuated synchronously with the advance speed of the paper web by means of a detection device which scans the web for the purpose of It is moved back to the working position.

It is not absolutely essential that the feed roller is also in the conveying position when the creping roller is engaged. Therefore,
Advantageously, the feed rollers are rapidly adjustable with respect to each other between an inactive position and a conveying position in which they engage the conveying paper web, and at least one of the two feed rollers is provided with a quick adjustment device. , the creping roller and the feed roller are adjusted such that only one pair of rollers simultaneously engages the paper web to be conveyed or wrinkled. Advantageously, the rollers on the same side of the web to be processed are rotatably mounted on respective common frames, the two frames being pivotable relative to each other about a common axis extending parallel to the roller axis, and at least A hydraulic or pneumatic servo motor is positioned between the two frames to pivot the frames relative to each other.

Advantageously, in order to facilitate the insertion of the paper web into the creping unit during start-up, the air nozzle device is arranged in front of the feed rollers in the direction of conveyance of the paper web and between the feed rollers and, if necessary, the creping unit. The web is oriented between the pin rollers and into the gap formed between the feed rollers for insertion.

Advantageously, the detection device q also activates a paper web separating device ``g'' which is arranged behind the creping roller in the transport direction of the paper web to be wrinkled, so that the separating device does not remove any material from the paper web. Cut out the part that should be removed.

The invention also relates to the use of the device according to the invention for creasing paper webs intended for the production of filter elements for cigarettes.

Advantageously, in order to remove cigarette filter elements with non-crumpled paper, the detection device detects the filter tube removal device located behind the cigarette filter tube separation device on the outlet side of the adjacent cigarette filter element making machine from the paper web. It is used synchronously with the transport speed of the paper web so as to operate independently of the forward speed.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be explained in detail below with respect to an embodiment thereof in connection with a cigarette filter element manufacturing unit and with reference to the accompanying drawings.

DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown, in the illustrated device the paper web 2 drawn off from the storage roll 1 is fed via a compensating roller 4 to the creping rollers 1-5. During the passage, web 2
It runs past an optoelectronic detection device 6. The creping unit 5 has two creping rollers 8'8' which engage one another and are formed with peripheral grooves and ribs in a known manner, between which the paper web 2 is passed for processing. transported. The creping roller 8.8' is associated with two cooperating feed rollers 9, 9' connected to a drive and arranged to engage the web 2 on either side.

The two creping rollers 8.8' have an abutment 11 which limits the depth of engagement between the rollers and is very precisely adjustable by means of a cam 10, and a feed roller 9 made of elastic material.
, 9' between the cylinder and the abutment 13 which limits the pressure on the roller and is likewise adjustable by the cam 12, and a screw with vJ which is adjustable within the cylinder]
pneumatic servo motors 14, each having a piston coupled to a bearing rod; ．． 15 can be adjusted very quickly. For this purpose, each of the respective rollers 8, 9; 8', 9' on the same side of the web 2 is mounted on a respective common frame 16.17, which is parallel to the axis of the rollers. They are pivotable relative to each other about an extending common f1 line 18.

In this way, the feed rollers 9, 9' may be quickly adjusted relative to each other between a disengaged position and a transport position in which they engage the paper web 2 being fed. The resulting adjustment of the creping rollers 8, 8' and the feed rollers 9, 9' means that only one of the two pairs of rollers 8, 8'; 9, 9' simultaneously feeds or crepes the web 2. It becomes passively engaged.

As mentioned above, the optoelectronic paper web transport device 6, which monitors the advancing web 2, is located between the roll 1 and the compensating roller 4, in order to eliminate the risk of damage to the stamping rollers 8, 8'. The web 2 is scanned over adhesive areas that must not be wrinkled.

The output signal from the device 6 is fed to a signal processing unit 21 together with a signal provided by a speed sensor 7 and indicative of the forward speed of the web 2, which unit 21 causes the creping rollers 8, 8' to operate independently of the forward speed of the web. Adhesive part (
It is always brought out of engagement by the pneumatic servo motor 14 quickly just before the passage of the non-creased part, and is precisely brought into the previous working position by the servo motor 15 immediately after the passage of the adhesive part. As shown in FIG.

Roller 9' is mounted on the same pivot frame 17 as roller 8'.
, so that if the roller 8' moves into the release position, the feed roller 9' automatically moves into the operative engagement position, so that the web 2 practically experiences no break in tension. do not.

Creping rollers 8, 8' and feed rollers 9, 9'
The amount of pivoting movement required in the area where the paper web engages is from approximately 1111 m to 211111 m.

The creping teeth of the rollers 8, 8' are dimensioned (larger module) such that when moved out of creping engagement with the web, they still remain in mutual engagement but have an increased tooth profile gap. given, therefore,
On the one hand, the teeth of the mouth 8.8' are not damaged by the adhesive part of the passing web 2, and on the other hand, the teeth of the roller 8.
, 8' is reliably pivoted back into its creping position, the toothed rollers acting synchronously with each other and remaining engaged by the increasing tooth profile gap; Eliminates any risk of damage to the teeth.

All of the rollers 8,8':9,9' are driven by a common drive gear 3 (shown in broken lines) via a gear wheel 19 (also shown in broken lines) and a toothed belt 20.

When the scanning device 6 detects a glued part of the fed paper web 2, the signal supplied to the unit 21 causes the feed rate of the web 2 to be reduced until the glued part has left and then increased to the previous value. advantageously guarantee that

To facilitate the insertion of the web 2 into the creping unit 5 during plant start-up, the air nozzle arrangement W24 is
It is arranged in front of the feed rollers 9,9' and is oriented towards the gap between the rollers 9,9' so as to insert the web tip between the rollers.

During advancement, the web 2 runs between rollers 9.9';8.8' on a horizontal guide rod (not shown).

Of course, instead of using a common pivotable frame 17, the rollers 8, 8': 9, 9' can also be quickly adjusted separately from each other.

After leaving the creping unit 5, the web 2 is bundled together in a known manner by an air nozzle 25 to form strands with a circular cross section;
It is fed to a conventional cigarette filter element manufacturing unit 26 in which it is surrounded by a covering paper 27 to form a cigarette filter element tube that is glued along the longitudinal seam.

A filter tube separation device 28 with a knife rotatable about a horizontal axis is located at the outlet of the unit 26 and cuts the filter tube into equal length sections regardless of the forward speed of the filter tube.

The resulting tube section is described, for example, in Swiss Patent No. 619
The guide, which may be constructed as disclosed in No. 84.6, is sent to the lapping unit 29.

The unit 29 has a cylinder 30 formed with a groove for receiving the filter tube and an air nozzle 32 controllable via a solenoid valve 3) for precisely controllable ejection of defective filter tube sections. We are prepared.

Valve 3) is then actuated by the signal processing unit 21 so that all filter tube sections with non-crimped paper are rejected as defective, regardless of the forward speed of the web 2.

This device has a significantly higher speed than before, i.e. 400
It is possible to produce cigarette filter tubes with crumpled paper at IIl/min or more, ie without interruptions in operation due to adhesive parts of the web interfering with the creping process.

Instead of filter tubes for cigarettes, this device may be used, for example, for producing ink magazines or tubes.

The creping unit 5 according to the invention may be used, for example, to produce sanitary napkins made of wrinkled paper.

[Brief explanation of the drawing]

The drawing shows a schematic illustration of an embodiment of the device of the invention. 2...paper web, 6...optoelectronic detection device (scanning device), 8.8'...
...Creping roller, 9.9'...Feed roller, 11...Contact part, 14.15...
・Servo motor, 16.17... Frame, 1
8... Common axis, 24... Air nozzle device, 26... Cigarette filter element manufacturing unit, 28... Filter tube separation device, 29
...Guidance, push-out unit.

Claims (8)

[Claims] (1) A paper web creasing device comprising at least two creping rollers conveyed and interengaging between them for processing the paper web, wherein said creping rollers (8, 8') are connected to a drive device. relative to at least two cooperating feed rollers (9, 9') which are coupled and arranged to engage on opposite sides of said paper web (2), the disengagement position and mutual engagement depth; at least one of the two rollers (8
′) are coupled to a quick adjusting device (14, 15), which quick adjusting device is arranged in front of the creping rollers (8, 8′) in the direction of conveyance of the web (2) to be crumpled so that the web (2) is crumpled. The creping roller (
8, 8') are brought into a released position prior to passage of the part to be removed and are subsequently moved back into the previous working position. (2) the feed rollers (9, 9') are rapidly adjustable relative to each other between an inactive position and a conveying position in which they engage the paper web (2) to be conveyed; At least one roller (9') of said feed rollers is coupled to a quick adjustment device (14, 15), said creping roller (8, 8') and said feed roller (9, 9')
Claim 1, characterized in that the paper web (2) to be conveyed or wrinkled is adjusted to simultaneously engage only one pair of rollers (8, 8') or (9, 9'). The creasing device according to item 1. (3) rollers on the same side of said web (2) to be processed (
8, 9 or 8', 9') in each common frame (1
6 or 17), characterized in that the two said frames (16, 17) are pivotable relative to each other about a common axis (18) extending parallel to the axis of said rollers. A creasing device according to claim 2. (4) at least one hydraulic or pneumatic servo motor (14, 15) is connected to said two frames (16, 17);
) with respect to each other, the frames (16, 1
7) The creasing device according to claim 3, wherein the creasing device is disposed between 7) and 7). (5) The air nozzle device (24) is connected to the paper web (2).
is arranged in front of the feed rollers in the conveying direction of the feed rollers, and the feed rollers are arranged so as to insert the web (2) between the feed rollers (9, 9') and, if necessary, between the creping rollers (8, 8'). 5. A creasing device according to claim 1, wherein the creasing device is oriented toward the gap formed between the rollers. (6) The detection device (6) detects the creping roller (8,
8'), said separating device thus cutting off said part to be removed from said paper web (2). The creasing device according to any one of ranges 1 to 5. (7) Use of the creasing device according to claim 1 for creasing paper webs (2) used for producing filter elements for cigarettes. (8) In order to remove cigarette filter elements with non-crumpled paper, said detection device (6) is arranged independently of the advancing speed of said paper web (2) at the outlet of the adjacent cigarette filter element making machine (26). Claim 1, characterized in that it is used synchronously with the transport speed of the paper web, so as to actuate a filter tube removal device (29) located behind the side cigarette filter tube separation device (28). Uses as described in Section 7.