CA2070088A1 - Apparatus for severing sections from a web of material provided with transverse lines of perforations - Google Patents
Apparatus for severing sections from a web of material provided with transverse lines of perforationsInfo
- Publication number
- CA2070088A1 CA2070088A1 CA002070088A CA2070088A CA2070088A1 CA 2070088 A1 CA2070088 A1 CA 2070088A1 CA 002070088 A CA002070088 A CA 002070088A CA 2070088 A CA2070088 A CA 2070088A CA 2070088 A1 CA2070088 A1 CA 2070088A1
- Authority
- CA
- Canada
- Prior art keywords
- belt conveyor
- double belt
- tear
- web
- retaining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 230000005540 biological transmission Effects 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F3/00—Severing by means other than cutting; Apparatus therefor
- B26F3/002—Precutting and tensioning or breaking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
- B65H35/10—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with devices for breaking partially-cut or perforated webs, e.g. bursters
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Advancing Webs (AREA)
- Making Paper Articles (AREA)
- Sewing Machines And Sewing (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
1090-9 AN APPARATUS FOR SEVERING SECTIONS FROM A WEB OF MATERIAL PROVIDED WITH TRANSVERSE PERFORATION LINES An apparatus is provided for severing sections from a web of material having transverse perforation lines and preferably from single or multiply tubular paper having transverse perforation lines. The apparatus consists of a retaining double belt conveyor and of a tear off double belt conveyor, arranged at a distance in the conveying direction downstream from the retaining double belt conveyor. In the retaining double belt conveyor the bend and or idler rolls or rollers of the conveyor belt or belts on the lower side of the web of material are offset in the longitudinal direction in relation to the bend in idler rolls on the top side so that the web of material passes through the retaining double belt conveyor in a corrugated manner. In the tear off double belt conveyor the conveyor belts are arranged on the lower and top sides of the web of material with an offset. In order to simplify the design, the idler rolls of the upper and of the lower conveyor belts of the tear off double belt conveyor are also positioned in relation to each other so that the web of material runs through the tear off double belt conveyor in a corrugated manner. The tear off double belt conveyor is driven at approximately the same basic speed as the retaining double belt conveyor. Intermittently the tear off double belt conveyor is driven at a higher speed when one or more transverse perforation lines are located at a point of severance between the retaining double belt conveyor and the tear off double belt conveyor.
Description
\
AN APPARATUS FOR SEVERING SECTIONS FRON A WEB
OF M~TERI~L PROVIDED WITH TRANS~RSE PERFORATION ~INES
The invention relates to an apparatus for severing sections from a web of material provided with transverse perforation lines. Preferably the sections are severed from a single or multi-ply tubular paper web provided with transverse perforation lines. The apparatus consists of a retaining double belt conveyor, in which the bend and/or idler rolls or rollers of the conveyor belt, or belts, on the lower side of the web of material are offset in the longitudinal direction in relation to the bend and idler rolls or rollers on the top side, so that the web of material passes through the retaining double belt conveyor in a corrugated manner; and of a tear off double belt conveyor, arranged at a distance in the conveying direction downstream from the retaining conveyor, in which the bend and idler rolls or rollers of the conveyor belts are arranged on the lower and top sides of the web of material with an offset.
A severing apparatus of this type is described in ~uropean patent publication 96 223. In this known severing apparatus the bend and idler rolls or rollers of the upper and lower conveyor belts of the retaining double belt conveyor are offset in relation to each other, and also displaced in relation to each other so that the tubular paper web passing through the retaining double belt conveyor in a corrugated manner is gripped or frictionally held by the conveyor belts. The lower belt or belts of the tear off double belt conveyor are driven at a higher speed than the lower conveyor belt or belts of the retaining double belt conveyor; feed of the tubular paper web is ensured by an engagement loading between upper and lower conveyor belts and the paper web, which is so low that the speed differential in relation to the retaining double belt conveyor is allowed for by corresponding slip. The lower idler rolls or rollers of the tear off double belt conveyor are mounted on a support moved upward and downwards by an eccentric. When a perforation line, which is to be torn, runs into the gap between the retaining double belt conveyor and the tear off double belt conveyor, the lower idler roll or rollers of the tear off belt are moved toward the idler rolls or rollers of the upper tear off belts so that the latter will grip the section of the paper web which is to be severed and draw it forwards at a speed above that of the retaining double belt conveyor. Tearing of the paper web then takes place at the transverse perforation lines. The lower rolls or rollers are then lowered again, so that the severed section of tubular paper web is passed through and the following one is drawn in.
This known severing apparatus is, however, complex in design: vertical movement of the lower idler rolls or rollers mounted on a carrier has to be provided together with an intermittent drive device for the upward and downward movement of the carrier.
This invention therefore seeks to provide an apparatus of this type having a simpler design with which sections may be severed from a web of material provided with transverse perforation lines.
In an apparatus according to the invention the idler rolls of the upper and of the lower conveyor belts of the tear off double belt conveyor are positioned in relation to each other so that the web of material runs through the tear off double belt conveyor in a corrugated manner. The tear off double belt conveyor is adapted to be driven at approximately the same basic speed as the retaining double belt conveyor. The tear off double belt conveyor is also driven intermittently at a higher speed, when one or more transverse perforation lines at a point of severance are located between the double belt conveyor and the tear off double belt conveyor.
The apparatus in accordance with the in~ention is simple in design, because it does without upwardly and downwardly moving idler rolls moved by an intermittent drive. In fact the web of material passes both through the retaining double belt conveyor and the tear off double belt conveyor in such a corrugated manner at least between the idler rolls of the two double belt conveyors that there is negligible slip between the rolls and the belt conveyors.
If a section is to be torn off when a transverse perforation line has come between the double belt conveyors, the tear off double belt conveyor i5 driven for a short time at a higher speed so that the tension necessary for tearing is produced and the severed section is separated. When the following section enters the tear off double belt conveyor, the conveyor will have reached its lower speed, corresponding to the retaining double belt conveyor. Until the next following tear reaches the gap there will be a period of feed at a basic speed corresponding to that of the retaining double belt conveyor. The cyclically increased speed leading to the tear off tension of the tear off double belt conveyor may be produced with known drive means.
It is convenient if at least one belt of the tear off double belt conveyor is driven by a servo motor, which accelerates the belt intermittently to a higher speed for the tear off and then retards it to the conveying speed of the double belt conveyor. Variable speed motors are available in many different forms.
Furthermore it is possible as well for the tear off double belt conveyor to be driven by a differential drive from the drive of the retaining double belt conveyor,
AN APPARATUS FOR SEVERING SECTIONS FRON A WEB
OF M~TERI~L PROVIDED WITH TRANS~RSE PERFORATION ~INES
The invention relates to an apparatus for severing sections from a web of material provided with transverse perforation lines. Preferably the sections are severed from a single or multi-ply tubular paper web provided with transverse perforation lines. The apparatus consists of a retaining double belt conveyor, in which the bend and/or idler rolls or rollers of the conveyor belt, or belts, on the lower side of the web of material are offset in the longitudinal direction in relation to the bend and idler rolls or rollers on the top side, so that the web of material passes through the retaining double belt conveyor in a corrugated manner; and of a tear off double belt conveyor, arranged at a distance in the conveying direction downstream from the retaining conveyor, in which the bend and idler rolls or rollers of the conveyor belts are arranged on the lower and top sides of the web of material with an offset.
A severing apparatus of this type is described in ~uropean patent publication 96 223. In this known severing apparatus the bend and idler rolls or rollers of the upper and lower conveyor belts of the retaining double belt conveyor are offset in relation to each other, and also displaced in relation to each other so that the tubular paper web passing through the retaining double belt conveyor in a corrugated manner is gripped or frictionally held by the conveyor belts. The lower belt or belts of the tear off double belt conveyor are driven at a higher speed than the lower conveyor belt or belts of the retaining double belt conveyor; feed of the tubular paper web is ensured by an engagement loading between upper and lower conveyor belts and the paper web, which is so low that the speed differential in relation to the retaining double belt conveyor is allowed for by corresponding slip. The lower idler rolls or rollers of the tear off double belt conveyor are mounted on a support moved upward and downwards by an eccentric. When a perforation line, which is to be torn, runs into the gap between the retaining double belt conveyor and the tear off double belt conveyor, the lower idler roll or rollers of the tear off belt are moved toward the idler rolls or rollers of the upper tear off belts so that the latter will grip the section of the paper web which is to be severed and draw it forwards at a speed above that of the retaining double belt conveyor. Tearing of the paper web then takes place at the transverse perforation lines. The lower rolls or rollers are then lowered again, so that the severed section of tubular paper web is passed through and the following one is drawn in.
This known severing apparatus is, however, complex in design: vertical movement of the lower idler rolls or rollers mounted on a carrier has to be provided together with an intermittent drive device for the upward and downward movement of the carrier.
This invention therefore seeks to provide an apparatus of this type having a simpler design with which sections may be severed from a web of material provided with transverse perforation lines.
In an apparatus according to the invention the idler rolls of the upper and of the lower conveyor belts of the tear off double belt conveyor are positioned in relation to each other so that the web of material runs through the tear off double belt conveyor in a corrugated manner. The tear off double belt conveyor is adapted to be driven at approximately the same basic speed as the retaining double belt conveyor. The tear off double belt conveyor is also driven intermittently at a higher speed, when one or more transverse perforation lines at a point of severance are located between the double belt conveyor and the tear off double belt conveyor.
The apparatus in accordance with the in~ention is simple in design, because it does without upwardly and downwardly moving idler rolls moved by an intermittent drive. In fact the web of material passes both through the retaining double belt conveyor and the tear off double belt conveyor in such a corrugated manner at least between the idler rolls of the two double belt conveyors that there is negligible slip between the rolls and the belt conveyors.
If a section is to be torn off when a transverse perforation line has come between the double belt conveyors, the tear off double belt conveyor i5 driven for a short time at a higher speed so that the tension necessary for tearing is produced and the severed section is separated. When the following section enters the tear off double belt conveyor, the conveyor will have reached its lower speed, corresponding to the retaining double belt conveyor. Until the next following tear reaches the gap there will be a period of feed at a basic speed corresponding to that of the retaining double belt conveyor. The cyclically increased speed leading to the tear off tension of the tear off double belt conveyor may be produced with known drive means.
It is convenient if at least one belt of the tear off double belt conveyor is driven by a servo motor, which accelerates the belt intermittently to a higher speed for the tear off and then retards it to the conveying speed of the double belt conveyor. Variable speed motors are available in many different forms.
Furthermore it is possible as well for the tear off double belt conveyor to be driven by a differential drive from the drive of the retaining double belt conveyor,
2~
the differential drive from the retaining double belt conveyor being able to have the higher tear off speed fed to it intermittently. In accordance with a further advantageous form of the invention there is a provision for the tear off double belt conveyor to be driven by a differential drive, which drive in turn is derived from the drive of the retaining double belt conveyor. The differential drive is associated with a coupling and brake unit in such a manner that a higher tear off speed may be fed to the tear off double belt conveyor intermittently.
If, for instance, the differential drive consists of epicyclic gearing, then the tear off double belt conveyor will be run at the same speed as the retaining double belt conveyor, when the sun wheel is joined by the coupling and brake unit with the frame bearing the planet wheels, which frame bears the drive gear wheel for the tear off double belt conveyor. If/ on the other hand, the coupling and brake unit is used to uncouple the sun wheel from the planet wheel frame and to hold it fixed in relation to the stationary part of the gearing system, the tear off double belt conveyor will be driven at a higher speed corresponding to the ratio of the planet wheel epicyclic drive.
Preferred embodiments of the invention are illustrated in detail in the following drawings.
Figure 1 is diagrammatic side elevation of a severing device includng a retaining double belt conveyor and a tear off double belt conveyor;
Figure 2 shows a drive including a differential transmission drive, for the tear off double belt conveyor, partly in section.
Referring first to Figure 1, a multi-ply tubular web 3 is fed to the retaining double belt conveyor 1 through feed conveyor devices and guide devices, of which the last pair of rolls 32 is indicated. The retaining z~
double belt conveyor 1 consists of lower bend rolls 5 and 6 for a lower conveyor belt or belts 7 of which the front bend roll or bend roller 6 is driven in a conventional manner by a geared motor 8 and drive means 9 such as chains or belts. The upper conveyor belt or belts 10 run over non-driven or idling bend rolls 11 and 12 and the bend rolls 13 and 14 which are arranged between the bend rolls 11 and 12. The rolls 12, 13 and 14 are journaled in a frame 15 which is pivoted about the axis of the front bend roll 11 and moved by a piston and cylinder unit 16.
Between the bend rolls 5 and 6 of the lower conveyor belt 7 idler rolls 19, 20 and 21 are placed. The two sets of rolls for the upper and lower conveyor belts are offset in relation to each other in the illustrated manner. By means of the piston and cylinder unit 16 the frame 15 is lowered toward the rolls of the lower conveyor belt so that the tubular web 3 runs through the retaining double belt conveyor in the illustrated manner with corrugations. The web 3 also is held substantially without slip by the conveyor belts 7 and 10 so that the retaining double belt conveyor 1 is able to take up the intermittently applied tear tension substantially without slip.
The retaining double belt conveyor 1 is substantially the same as the feed station described European patent publication 98 223.
In the apparatus in accordance with the invention the tear off double belt coneyor 2 is basically the same in design as the retaining double belt conveyor 1 so that the above description of the retaining double belt conveyor may be referred to. The substantial difference between the tear off double belt conveyor 2 and the retaining double belt conveyor 1 relates to the drive 25. The drive 25 of the tear off double belt conveyor consists of a transmission with a servo motor, which drives the lower conveyor belt or belts of the tear off double belt conveyor t ~
2 at a basic speed corxesponding to the retaining double belt conveyor. However, intermittently the servo motor drives the tear off double belt conveyor at a higher speed in order to produce the tear off tension.
The servo motor of the tear off double belt conveyor 2 may be provided with a corresponding intermittent or cyclic controller. It is also possible to have a sensor device to detect the entry of the transverse perforation lines 4 into the gap between the two double belt conveyors and then to provide a signal for the servo motor to speed up the tear off conveyor. The advantage of such a means is that uninterrupted tear off is possible without continuous adjustment operations even if the length of the sections between the transverse perforation lines 4 varies.
The tubular paper web 3 can also comprise a multi-ply paper web, from which the sections are severed for the production of bags or sacks. The transverse perforation lines of the individual paper plies are then arranged at the tear lines 4 in a conventional staggered arrangement.
The drive of the tear off double belt conveyor will now be described with reference to Figure 2. A
differential transmission imparts a higher speed intermittently to the conveyor in step with the tear off operation. The drive of the differential transmission is derived from the drive of the retaining double belt conveyor.
The lower belt 102 of the tear off double belt conveyor runs over its drive roll 101. The stub shaft 103 of the drive roll 101 is supported in suitable bearings on a wall 104 of the frame, and projects through the wall 104 of the frame. On to the end of the stub shaft 2C~ 8 103 projecting through the wall 104 a gear wheel 105 is keyed, which is in mesh with a further gear wheel 106, which drives the drive roll 107 of the upper belt 108. An external internally toothed ring 109 is attached to the gear wheel 105, and constitutes part of a differential transmission in the form of epicyclic gearing. The internal teeth of the ring 109 are in mesh with the planet wheels 110, which are rotatably connected with the drive gear wheel 111 by shafts 110A. This drive gear wheel 111 is driven by intermediate wheels (not shown) from the retaining double belt conveyor at the same speed. The drive gear wheel 111 is journalled onto a shaft 113. The shaft 113 is journalled at one end in the gear 105, and at the other end by ball bearing means in a hub of a brake disk 114. This brake disk 114 is permanently attached to a frame cover 115, which is attached to the machine frame 116.
The brake disk 114 secured to the frame is provided with an annular electric magnet 117 in its hub.
A ring 119 is secured to the shaft 113 which has an annular shoulder 120 on one side. The ring 119 bears against a compression spring 120'. One end of the spring 120' bears against the annular shoulder 120 and the other end bears on a lock washer 121, which is held in the hub 122 of an axially sliding brake disk 123 which is not able to rotate. When the annular magnet 117 is not excited, the brake disk 123 is urged toward the gear 111 by the compression spring 120', so that the brake disk 123 is forced against the brake disk 124 which is permanently connected by the annular holder 125 of the drive gear 111.
As shown in Figure 2 a sun wheel 126, which is keyed to the shaft 113, is in mesh with the planet wheels 110 .
As long as the annular magnet 117 is not supplied with powerl the brake disk 123 will be forced into engagement with the brake disk 124 so that the sun wheel 126 is coupled with the drive wheel 111 and the output speed of rotation of the gear wheel 105 will be equal to the speed of the drive wheèl 111.
If the annular magnet 117 is supplied with power, it will draw the axially displaceable brake disk 123 against the force of the compression spring 120' towards the brake disk 114 secured to the frame, so that the brake disk 123 and therefore the sun wheel 126 as well cannot rotate relative to the frame. Accordingly, the speed of the gear wheel 105 will be increased in accordance with the transmission ratio of the epicyclic gearing in relation to the speed of the drive gear 111.
The annular magnet 117 is powered in step with the desired tear off action so that the tear off double belt conveyor may be driven at a high speed intermittently without any servo drive.
the differential drive from the retaining double belt conveyor being able to have the higher tear off speed fed to it intermittently. In accordance with a further advantageous form of the invention there is a provision for the tear off double belt conveyor to be driven by a differential drive, which drive in turn is derived from the drive of the retaining double belt conveyor. The differential drive is associated with a coupling and brake unit in such a manner that a higher tear off speed may be fed to the tear off double belt conveyor intermittently.
If, for instance, the differential drive consists of epicyclic gearing, then the tear off double belt conveyor will be run at the same speed as the retaining double belt conveyor, when the sun wheel is joined by the coupling and brake unit with the frame bearing the planet wheels, which frame bears the drive gear wheel for the tear off double belt conveyor. If/ on the other hand, the coupling and brake unit is used to uncouple the sun wheel from the planet wheel frame and to hold it fixed in relation to the stationary part of the gearing system, the tear off double belt conveyor will be driven at a higher speed corresponding to the ratio of the planet wheel epicyclic drive.
Preferred embodiments of the invention are illustrated in detail in the following drawings.
Figure 1 is diagrammatic side elevation of a severing device includng a retaining double belt conveyor and a tear off double belt conveyor;
Figure 2 shows a drive including a differential transmission drive, for the tear off double belt conveyor, partly in section.
Referring first to Figure 1, a multi-ply tubular web 3 is fed to the retaining double belt conveyor 1 through feed conveyor devices and guide devices, of which the last pair of rolls 32 is indicated. The retaining z~
double belt conveyor 1 consists of lower bend rolls 5 and 6 for a lower conveyor belt or belts 7 of which the front bend roll or bend roller 6 is driven in a conventional manner by a geared motor 8 and drive means 9 such as chains or belts. The upper conveyor belt or belts 10 run over non-driven or idling bend rolls 11 and 12 and the bend rolls 13 and 14 which are arranged between the bend rolls 11 and 12. The rolls 12, 13 and 14 are journaled in a frame 15 which is pivoted about the axis of the front bend roll 11 and moved by a piston and cylinder unit 16.
Between the bend rolls 5 and 6 of the lower conveyor belt 7 idler rolls 19, 20 and 21 are placed. The two sets of rolls for the upper and lower conveyor belts are offset in relation to each other in the illustrated manner. By means of the piston and cylinder unit 16 the frame 15 is lowered toward the rolls of the lower conveyor belt so that the tubular web 3 runs through the retaining double belt conveyor in the illustrated manner with corrugations. The web 3 also is held substantially without slip by the conveyor belts 7 and 10 so that the retaining double belt conveyor 1 is able to take up the intermittently applied tear tension substantially without slip.
The retaining double belt conveyor 1 is substantially the same as the feed station described European patent publication 98 223.
In the apparatus in accordance with the invention the tear off double belt coneyor 2 is basically the same in design as the retaining double belt conveyor 1 so that the above description of the retaining double belt conveyor may be referred to. The substantial difference between the tear off double belt conveyor 2 and the retaining double belt conveyor 1 relates to the drive 25. The drive 25 of the tear off double belt conveyor consists of a transmission with a servo motor, which drives the lower conveyor belt or belts of the tear off double belt conveyor t ~
2 at a basic speed corxesponding to the retaining double belt conveyor. However, intermittently the servo motor drives the tear off double belt conveyor at a higher speed in order to produce the tear off tension.
The servo motor of the tear off double belt conveyor 2 may be provided with a corresponding intermittent or cyclic controller. It is also possible to have a sensor device to detect the entry of the transverse perforation lines 4 into the gap between the two double belt conveyors and then to provide a signal for the servo motor to speed up the tear off conveyor. The advantage of such a means is that uninterrupted tear off is possible without continuous adjustment operations even if the length of the sections between the transverse perforation lines 4 varies.
The tubular paper web 3 can also comprise a multi-ply paper web, from which the sections are severed for the production of bags or sacks. The transverse perforation lines of the individual paper plies are then arranged at the tear lines 4 in a conventional staggered arrangement.
The drive of the tear off double belt conveyor will now be described with reference to Figure 2. A
differential transmission imparts a higher speed intermittently to the conveyor in step with the tear off operation. The drive of the differential transmission is derived from the drive of the retaining double belt conveyor.
The lower belt 102 of the tear off double belt conveyor runs over its drive roll 101. The stub shaft 103 of the drive roll 101 is supported in suitable bearings on a wall 104 of the frame, and projects through the wall 104 of the frame. On to the end of the stub shaft 2C~ 8 103 projecting through the wall 104 a gear wheel 105 is keyed, which is in mesh with a further gear wheel 106, which drives the drive roll 107 of the upper belt 108. An external internally toothed ring 109 is attached to the gear wheel 105, and constitutes part of a differential transmission in the form of epicyclic gearing. The internal teeth of the ring 109 are in mesh with the planet wheels 110, which are rotatably connected with the drive gear wheel 111 by shafts 110A. This drive gear wheel 111 is driven by intermediate wheels (not shown) from the retaining double belt conveyor at the same speed. The drive gear wheel 111 is journalled onto a shaft 113. The shaft 113 is journalled at one end in the gear 105, and at the other end by ball bearing means in a hub of a brake disk 114. This brake disk 114 is permanently attached to a frame cover 115, which is attached to the machine frame 116.
The brake disk 114 secured to the frame is provided with an annular electric magnet 117 in its hub.
A ring 119 is secured to the shaft 113 which has an annular shoulder 120 on one side. The ring 119 bears against a compression spring 120'. One end of the spring 120' bears against the annular shoulder 120 and the other end bears on a lock washer 121, which is held in the hub 122 of an axially sliding brake disk 123 which is not able to rotate. When the annular magnet 117 is not excited, the brake disk 123 is urged toward the gear 111 by the compression spring 120', so that the brake disk 123 is forced against the brake disk 124 which is permanently connected by the annular holder 125 of the drive gear 111.
As shown in Figure 2 a sun wheel 126, which is keyed to the shaft 113, is in mesh with the planet wheels 110 .
As long as the annular magnet 117 is not supplied with powerl the brake disk 123 will be forced into engagement with the brake disk 124 so that the sun wheel 126 is coupled with the drive wheel 111 and the output speed of rotation of the gear wheel 105 will be equal to the speed of the drive wheèl 111.
If the annular magnet 117 is supplied with power, it will draw the axially displaceable brake disk 123 against the force of the compression spring 120' towards the brake disk 114 secured to the frame, so that the brake disk 123 and therefore the sun wheel 126 as well cannot rotate relative to the frame. Accordingly, the speed of the gear wheel 105 will be increased in accordance with the transmission ratio of the epicyclic gearing in relation to the speed of the drive gear 111.
The annular magnet 117 is powered in step with the desired tear off action so that the tear off double belt conveyor may be driven at a high speed intermittently without any servo drive.
Claims (9)
1. An apparatus for severing sections from a web of material provided with transverse perforation lines consisting of:
- a retaining double belt conveyor in which the bend and idler rolls of the conveyor belt on the lower side of the web of material are offset in a longitudinal direction in relation to the bend and idler rolls on the top side so that the web of material passes through the retaining double belt conveyor in a corrugated manner, and - a tear off double belt conveyor arranged at a distance in the conveying direction downstream from the retaining double belt conveyor in which the bend and idler rolls of the conveyor belt are arranged on the lower and top sides of the web of material with an offset wherein:
- the idler rolls of the upper end of the lower conveyor belts of the tear off double belt conveyor are positioned in relation to each other so that the web of material runs through the tear off double belt conveyor in a corrugated manner, the tear off double belt conveyor is driven at approximately the same basic speed as the retaining double belt conveyor, and the tear off double belt conveyor is adapted to be driven intermittently at a higher speed when one or more transverse perforation lines is located between the retaining double belt conveyor and the tear off double belt conveyor.
- a retaining double belt conveyor in which the bend and idler rolls of the conveyor belt on the lower side of the web of material are offset in a longitudinal direction in relation to the bend and idler rolls on the top side so that the web of material passes through the retaining double belt conveyor in a corrugated manner, and - a tear off double belt conveyor arranged at a distance in the conveying direction downstream from the retaining double belt conveyor in which the bend and idler rolls of the conveyor belt are arranged on the lower and top sides of the web of material with an offset wherein:
- the idler rolls of the upper end of the lower conveyor belts of the tear off double belt conveyor are positioned in relation to each other so that the web of material runs through the tear off double belt conveyor in a corrugated manner, the tear off double belt conveyor is driven at approximately the same basic speed as the retaining double belt conveyor, and the tear off double belt conveyor is adapted to be driven intermittently at a higher speed when one or more transverse perforation lines is located between the retaining double belt conveyor and the tear off double belt conveyor.
2. The apparatus as claimed in Claim 1 wherein the tear off double belt conveyor is driven by a servo motor which intermittently accelerates it to a higher tear off speed and then retards it to the conveying speed of the retaining double belt conveyor.
3. The apparatus as claimed in Claim 1 wherein the tear off double belt conveyor is driven by a differential transmission.
4. The apparatus as claimed in Claim 3 whose drive is taken from the drive of the retaining double belt conveyor.
5. The apparatus as claimed in claim 3 wherein the differential transmission is adapted to be run up to a higher tear off speed by means of a servo motor.
6. The apparatus as claimed in Claim 1 wherein the tear off double belt conveyor is driven by a differential transmission whose drive is taken from the drive of the retaining double belt conveyor and in that a coupling and brake unit is so associated with the differential drive that the tear off double belt conveyor is able to be run at a higher operating speed intermittently.
7. The apparatus as claimed in Claim 1 wherein the web comprises a paper web provided with transverse perforation lines.
8. The apparatus as claimed in Claim 1 wherein the web comprises a single ply tubular web provided with transverse perforation lines.
9. The apparatus as claimed in Claim 1 wherein the web comprises a multi-ply tubular web provided with transverse perforation lines.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4118435 | 1991-06-05 | ||
| DEP4118435.1 | 1991-06-05 | ||
| DE4134834A DE4134834A1 (en) | 1991-06-05 | 1991-10-22 | DEVICE FOR SEPARATING SECTIONS FROM A CROSS-PERFORATED MATERIAL |
| DEP4134834.6 | 1991-10-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2070088A1 true CA2070088A1 (en) | 1992-12-06 |
Family
ID=25904263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002070088A Abandoned CA2070088A1 (en) | 1991-06-05 | 1992-05-29 | Apparatus for severing sections from a web of material provided with transverse lines of perforations |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0516991B1 (en) |
| JP (1) | JPH05154266A (en) |
| CA (1) | CA2070088A1 (en) |
| DE (2) | DE4134834A1 (en) |
| ES (1) | ES2057946T3 (en) |
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| WO2017135915A1 (en) * | 2016-02-04 | 2017-08-10 | Somtas Makine Ambalaj Sanayi Ve Ticaret Anonim Sirketi | Break off system for paper cutting machines |
| WO2020208661A1 (en) | 2019-04-10 | 2020-10-15 | Plusline S.R.L. | Feeding unit for feeding a plastic film in packaging machines |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4243105C2 (en) * | 1992-12-18 | 1997-08-28 | Windmoeller & Hoelscher | Separating device for separating perforated hose sections |
| DE4440660C2 (en) * | 1994-11-14 | 1998-12-03 | Windmoeller & Hoelscher | Separating device for separating perforated hose sections |
| US6152345A (en) * | 1999-03-23 | 2000-11-28 | Eastman Kodak Company | Method for controlling width-wise expansion of a conveyed web |
| CA2380190C (en) * | 2001-07-05 | 2005-09-13 | Yen Sun Technology Corp. | Tissue paper dispenser with a device for separating a roll of tissue paper and method thereof |
| CN105584870A (en) * | 2015-07-08 | 2016-05-18 | 常州永盛新材料装备股份有限公司 | Coiled material machining device with paper flattening conveying device and uncoiling lifting deviation rectifying device and method |
| IT201900007812A1 (en) * | 2019-06-03 | 2020-12-03 | Plusline S R L | Group for feeding plastic film. |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2851894A1 (en) * | 1978-11-30 | 1980-06-12 | Agfa Gevaert Ag | DEVICE FOR SEPARATING PRE-PERFORATED TAPES, PREFERABLY CONTINUOUS BAGS |
| DE3220892A1 (en) * | 1982-06-03 | 1983-12-08 | Icoma Packtechnik GmbH, 7590 Achern | DISCONNECTOR FOR SEPARATING PERFORATED PAPER HOSE SECTIONS |
| GB8500402D0 (en) * | 1984-01-09 | 1985-02-13 | Pitney Bowes Inc | Bursting machine |
| IT215262Z2 (en) * | 1988-11-21 | 1990-09-11 | Meschi Ind Grafica | STRAPPERINA FOR TAPES OF MATERIALS IN SHEETS SUCH AS PAPER TAPES. |
-
1991
- 1991-10-22 DE DE4134834A patent/DE4134834A1/en not_active Withdrawn
-
1992
- 1992-05-07 ES ES92107727T patent/ES2057946T3/en not_active Expired - Lifetime
- 1992-05-07 EP EP92107727A patent/EP0516991B1/en not_active Expired - Lifetime
- 1992-05-07 DE DE59200343T patent/DE59200343D1/en not_active Expired - Fee Related
- 1992-05-29 CA CA002070088A patent/CA2070088A1/en not_active Abandoned
- 1992-06-02 JP JP4141451A patent/JPH05154266A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017135915A1 (en) * | 2016-02-04 | 2017-08-10 | Somtas Makine Ambalaj Sanayi Ve Ticaret Anonim Sirketi | Break off system for paper cutting machines |
| WO2020208661A1 (en) | 2019-04-10 | 2020-10-15 | Plusline S.R.L. | Feeding unit for feeding a plastic film in packaging machines |
| US11964786B2 (en) | 2019-04-10 | 2024-04-23 | Plusline S.R.L. | Feeding unit for feeding a plastic film in packaging machines |
Also Published As
| Publication number | Publication date |
|---|---|
| DE59200343D1 (en) | 1994-09-08 |
| EP0516991B1 (en) | 1994-08-03 |
| ES2057946T3 (en) | 1994-10-16 |
| JPH05154266A (en) | 1993-06-22 |
| EP0516991A1 (en) | 1992-12-09 |
| DE4134834A1 (en) | 1992-12-10 |
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