US3730411A - Severing apparatus for severing lengths of tube from a continuously fed flattened tubular web - Google Patents

Severing apparatus for severing lengths of tube from a continuously fed flattened tubular web Download PDF

Info

Publication number
US3730411A
US3730411A US00108483A US3730411DA US3730411A US 3730411 A US3730411 A US 3730411A US 00108483 A US00108483 A US 00108483A US 3730411D A US3730411D A US 3730411DA US 3730411 A US3730411 A US 3730411A
Authority
US
United States
Prior art keywords
rolls
web
severing
tensioning
pair
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.)
Expired - Lifetime
Application number
US00108483A
Inventor
F Brockmuller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19702004348 external-priority patent/DE2004348C/en
Application filed by Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Application granted granted Critical
Publication of US3730411A publication Critical patent/US3730411A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T225/00—Severing by tearing or breaking
    • Y10T225/30—Breaking or tearing apparatus
    • Y10T225/35—Work-parting pullers [bursters]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/323—With means to stretch work temporarily

Definitions

  • such severing apparatus comprises a pair of holding rolls rotatable at a peripheral speed equal to or less than the feeding speed of the web and a pair of severing rolls disposed downstream of the holding rolls at a distance therefrom less than the interval between successive scorelines for advancing the leading end of the web at a higher speed than the holding rolls during each severing operation.
  • Apparatus of this kind is particularly useful in conjunction with tube drawing machines for the continuous formation of staggered tube sections which have a plurality of plies that are laterally offset from one another and which serve for the manufacture of multi-ply bags by the staggered transverse perforation of the required webs of material, laying the webs to form a staggered tubular web and severing the individual staggered tube sections therefrom along the transverse perforations.
  • the holding rolls turn at a lower peripheral speed than the feeding speed of the staggered tubular web and the severing rolls turn at a higher speed than the feeding speed, means being provided for displacing an upper roll of each pair towards and away from the other 'roll in the operating sequence of the staggered tube-making machine.
  • the feed rolls of the tubemaking machine feed the flattened tubular web into the severing apparatus whilst the upper holding and sever ing rolls are raised so that the leading scoreline in the web reaches the space between the pairs of holding and severing rolls.
  • the web is subjected to such a high tension that it will tear along the scoreline.
  • the length of tube so severed is delivered by the severing rolls to a downstream conveyor which discharges the severed lengths from the staggered tube machine.
  • Free feeding of the leading end of the tubular web into the severing apparatus means that this leading end will be quite slack, the degree of slackness being all the higher if the feeding speed of the web is high.
  • the resultant shock-like tightening of the web until it tears along the leading scoreline gives rise to a very loud report resembling the noise of an explosion and this is extraordinarily disturbing especially in the case of high-speed production.
  • the invention aims to provide a severing apparatus which operates less noisily and avoids crooked running of the leading-end of the web.
  • a severing apparatus for severing lengths of tube from a continuously fed flattened tubular web which is provided with transverse scorelines at intervals along its length, comprising a pair of holding rolls rotatable at a peripheral speed equal to or less than the feeding speed of the web, a pair of severing rolls disposed downstream of the holding rolls at a distance therefrom less than the interval between successive scorelines for advancing the leading end of the web at a higher speed than the holding rolls during each severing operation, and a pair of tensioning rolls disposed downstream of the severing rolls to engage the leading end of the web and tightening the web before each severing operation, the peripheral speed of the tensioning rolls during tightening of the web being higher than the feeding speed of the web and the tensile force exerted thereby being set so that the web entering the nip of the tensioning rolls in a slack condition will be pulled taut before each severing operation but without tearing the web along
  • Tightening of the web at a limited tension before each actual severing operation permits the web to be severed along the scoreline substantially without any shock, only small differences in peripheral speed being required for the holding rolls and the severing rolls. Severing therefore takes place without a loud noise.
  • tightening of the web will cause it to be pulled straight if it happens to have wandered and the web will therefore be returned to a path at right-angles to the roll axes to ensure clean severing of each tube length.
  • the severing rolls are effectively applied to the web only during each severing operation and the tensioning rolls are located at a distance downstream thereof so that the spacing of the tensioning rolls from the leading scoreline of the web is less than the interval between successive scorelines.
  • the tensile force of the pair of tensioning rolls may be adjustable by varying the pressure between these rolls or by means of a controllable friction clutch provided in the drive of the tensioning rolls.
  • the severing rolls downstream of the tensioning rolls may be in constant contact with the web but it may be of advantage for one of the tensioning rolls to be displaceable to and from the other so that the duration of tightening can be reduced at will and so that withdrawal of the severed tube length is possible at a higher speed than the peripheral speed of the tensioning rolls by means of some other conveying equipment.
  • An example of the invention is diagrammatically illustrated in the accompanying single drawing which is a side elevation of a severing apparatus making use of a pair of severing rolls and a pair of tensioning rolls.
  • a staggered tubular web St is formed in a staggered tube machine (not shown) from a plurality of webs which are transversely perforated at intervals I along the length of the web corresponding to the desired lengths of tube to be severed.
  • the web St is fed at a uniform speed in the direction a by means of pairs 1, 2 of feed rolls.
  • the leading free end of the web then reaches severing means 3 for tearing a tube section S therefrom.
  • the severing means 3 comprise a pair of holding rolls 4, 4' and, downstream thereof, a pair of severing rolls 5, 5.
  • the center-to-center spacing x between these pairs of rolls is less than the smallest interval I likely to be encountered between successive scorelines P, i.e., less than the length of the shortest tube section S that might be desired to be severed. This arrangement ensures that even if very short lengths are to be severed only one scoreline P of the web St will be located along the path x between the holding and tensioning rolls.
  • the two lower rolls 4, of each pair are driven at different peripheral speeds.
  • the holding roll 4 has a peripheral speed which is about one half percent less than the feeding speed of the web imparted by the pairs 1, 2 of feed rolls whilst the severing roll 5 has a peripheral speed of about 12 percent higher than the feeding speed.
  • the upper rolls 4', 5' are mounted for free rotation on pivotable levers 6, 6'. The latter are pivotable by means of bars 7, 7' in synchronism with the operating sequence of the staggered tube machine so that the upper rolls are moved to and from the lower rolls.
  • any desired drive means may be provided for the bars 7, 7 and these are so coupled with the drive of the staggered tube machine that reciprocation of the rolls 4, 5' always takes place whilst a scoreline P is moving along the path x between the pair of holding rolls 4, 4' and the pair of severing rolls 5, 5'.
  • a pair of tensioning rolls 8, 8 which is driven at a peripheral speed about 35 percent higher than the feeding speed of the web S! imparted by the pairs of feed rolls.
  • the upper tensioning roll 8 is loosely rotatable at both ends in sliding pads 9 and pressed against the lower roll 8 by means of springs 10.
  • the pressure with which the upper roll is applied to the lower roll is adjustable by altering the Spring tension with the aid of set screws 11.
  • the spacing y of the pair of tensioning rolls 8, 8 from the pair of severing rolls 5, 5' is such that the distance of the pair of tensioning rolls from the leading scoreline located between the rolls 4, 4' and 5, 5 during each severing operation is less than the interval t between successive scorelines P so that the leading end of the web will be gripped by the tensioning rolls whilst the leading scoreline is still passing along the path x between the rolls 4, 4 and 5, 5.
  • a doublebelt conveyor 12 Downstream of the pair of tensioning rolls a doublebelt conveyor 12 is provided for advancing the severed tube sections S and still further downstream there is a deviator 13 which can lead each severed tube section to a selected one of a plurality of base-laying machines (not shown) for forming bases on the tube sections if the latter are to be made into bags.
  • the web St is fed by the feed roll pairs 1, 2 at a constant speed when the upper holding roll 4 and the upper severing roll 5 are lifted from their respective backing rolls.
  • the web is tightened between the tensioning rolls and the feed rolls because the tensioning rolls are turning at a higher speed than the feed rolls.
  • the pull exerted on the web is limited by appropriately adjusting the pressure between the rolls 8, 8 with the aid of the set screws 11 so that the web will not tear along the leading scoreline during tightening.
  • the force could be set by means of a variable-torque friction clutch 14 which is indicated in chain-dotted lines. This has the advantage that when the tensioning rolls have attained the set tensile force they will not slide on the web as would be the case if the tensile force is limited by the pressure between the two tensioning rolls.
  • the upper roll 8 may, as already described for the rolls 4, 5, be freely rotatable in a pivotable lever and move to and from the roll 8 in synchronism with the operating cycle of the tube-making machine, the arrangement being such that the roll 8 will descend before the rolls 4 and 5 descend.
  • the severed tube section S can in this case be discharged by the double belt conveyor 12 at as high a speed as may be desired as soon as the upper rolls 4, 5', 8 have been raised again. This leaves sufficient time between successive severed tube sections to enable the deflector 13 to be operated.
  • Severing apparatus for severing lengths of tube from a continuously fed flattened tubular web which is provided with transverse scorelines at intervals along its length, comprising a pair of holding rolls rotatable at a peripheral speed equal to or less than the feeding speed of the web, a pair of severing rolls disposed downstream of the holding rolls at a distance therefrom less than the interval between successive scorelines for advancing the leading end of the web at a higher speed than the holding rolls during each severing operation, and a pair of tensioning rolls disposed downstream of the severing rolls to engage the leading end of the web and tighten the web before each severing operation, the peripheral speed of the tensioning rolls during tightening of the web being higher than the feeding speed of the web and the tensile force exerted thereby being set so that the web entering the nip of the tensioning rolls in a slack condition will be pulled taut before each severing operation but without tearing the web along a scoreline.

Abstract

The invention relates to a severing apparatus for severing lengths of tube from a continuously fed flattened tubular web which is provided with transverse scorelines such as perforations at intervals along its length.

Description

F i li a ite States i ate n 1 i T rockmuiflelr ay T, 1973 SEVERTNG APPARATUS FOR SEVERING LENGTHS OF TUBE FROM References ted A CUNTINUOUSLY FED FLATTENED UNITED STATES PATENTS TUBULAR WEB 2,247,069 6 1941 S t l ..225 IOOX [75] Invent: Friedrich Franz Bmckmuller, 454 3,543,980 121970 B35231; 2251100 x Lengerieh of Westphalia, Germany 2,513,093 6/1950 Hageman ..225/100 [731 Assignoo Win'dmonor & Hooch", Longorich $3332 2513?? 22322:1::13:..................::::fi32ii of Westphalia, Germany [22] Filed; Jam 21, 1971 Primary ExaminerAndrew R. Juhasz Assistant Examiner-James F. Coan PP N05 108,483 Attorney-Fleit, Gipple & Jacobson [30] Foreign Application Priority Data [57] ABSTRACT The invention relates to a severing apparatus for Jan. 30, 1970 Germany ..P 20 04 348.5 severing lengths of tube from a continuously fed flat tened tubular web which is provided with transverse iii} iri'iiijjjjjijjjjjjjjjjj"'"'J:J:Jjjjjjjjfffffikfiiii gggg oooo oo ooooooooooo oo olooo oo [58] Field of Search ..225/100, 96; 83/18,
83/ 175 5 Claims, 1 Drawing Figure PATENTEW 11973 3.730411 mvsmog \Friedrich F'rclnz BROCKMULLER his ATTORNEYS SEVERING APPARATUS FOR SEVERING LENGTHS OF TUBE FROM A CONTINUOUSLY FED FLATTENED TUBULAR WEB Usually, such severing apparatus comprises a pair of holding rolls rotatable at a peripheral speed equal to or less than the feeding speed of the web and a pair of severing rolls disposed downstream of the holding rolls at a distance therefrom less than the interval between successive scorelines for advancing the leading end of the web at a higher speed than the holding rolls during each severing operation. Apparatus of this kind is particularly useful in conjunction with tube drawing machines for the continuous formation of staggered tube sections which have a plurality of plies that are laterally offset from one another and which serve for the manufacture of multi-ply bags by the staggered transverse perforation of the required webs of material, laying the webs to form a staggered tubular web and severing the individual staggered tube sections therefrom along the transverse perforations.
Generally, the holding rolls turn at a lower peripheral speed than the feeding speed of the staggered tubular web and the severing rolls turn at a higher speed than the feeding speed, means being provided for displacing an upper roll of each pair towards and away from the other 'roll in the operating sequence of the staggered tube-making machine.
With such an arrangement, the feed rolls of the tubemaking machine feed the flattened tubular web into the severing apparatus whilst the upper holding and sever ing rolls are raised so that the leading scoreline in the web reaches the space between the pairs of holding and severing rolls. By momentarily lowering the upper roll of each pair, the web is subjected to such a high tension that it will tear along the scoreline. The length of tube so severed is delivered by the severing rolls to a downstream conveyor which discharges the severed lengths from the staggered tube machine.
Free feeding of the leading end of the tubular web into the severing apparatus means that this leading end will be quite slack, the degree of slackness being all the higher if the feeding speed of the web is high. This makes it necessary to have a comparatively high peripheral speed for the severing rolls relatively to the speed of the holding rolls so that the web will be tensioned whilst the leading scoreline is still passing through the space between the pairs of holding and severing rolls. The resultant shock-like tightening of the web until it tears along the leading scoreline gives rise to a very loud report resembling the noise of an explosion and this is extraordinarily disturbing especially in the case of high-speed production.
Another disadvantage caused by free feeding of the leading end of the web and arising especially with the high-speed-production of long staggered tube sections is that the slack free end may wander and be fed crookedly to the severing rolls. As a result, each length of tube may be severed unevenly and produce undesirable tears at the ends ofthe tubes as well as distortion. This gives rise to wastage and interruptions in production.
The invention aims to provide a severing apparatus which operates less noisily and avoids crooked running of the leading-end of the web.
According to the invention, there is provided a severing apparatus for severing lengths of tube from a continuously fed flattened tubular web which is provided with transverse scorelines at intervals along its length, comprising a pair of holding rolls rotatable at a peripheral speed equal to or less than the feeding speed of the web, a pair of severing rolls disposed downstream of the holding rolls at a distance therefrom less than the interval between successive scorelines for advancing the leading end of the web at a higher speed than the holding rolls during each severing operation, and a pair of tensioning rolls disposed downstream of the severing rolls to engage the leading end of the web and tightening the web before each severing operation, the peripheral speed of the tensioning rolls during tightening of the web being higher than the feeding speed of the web and the tensile force exerted thereby being set so that the web entering the nip of the tensioning rolls in a slack condition will be pulled taut before each severing operation but without tearing the web along a scoreline. Each severing operation thus takes place only after the web has been tightened.
Tightening of the web at a limited tension before each actual severing operation permits the web to be severed along the scoreline substantially without any shock, only small differences in peripheral speed being required for the holding rolls and the severing rolls. Severing therefore takes place without a loud noise. In addition, tightening of the web will cause it to be pulled straight if it happens to have wandered and the web will therefore be returned to a path at right-angles to the roll axes to ensure clean severing of each tube length.
In one form of the invention, the severing rolls are effectively applied to the web only during each severing operation and the tensioning rolls are located at a distance downstream thereof so that the spacing of the tensioning rolls from the leading scoreline of the web is less than the interval between successive scorelines.
When two pairs of rolls are provided for tightening and severing the web, the tensile force of the pair of tensioning rolls may be adjustable by varying the pressure between these rolls or by means of a controllable friction clutch provided in the drive of the tensioning rolls. The severing rolls downstream of the tensioning rolls may be in constant contact with the web but it may be of advantage for one of the tensioning rolls to be displaceable to and from the other so that the duration of tightening can be reduced at will and so that withdrawal of the severed tube length is possible at a higher speed than the peripheral speed of the tensioning rolls by means of some other conveying equipment.
An example of the invention is diagrammatically illustrated in the accompanying single drawing which is a side elevation of a severing apparatus making use of a pair of severing rolls and a pair of tensioning rolls.
A staggered tubular web St is formed in a staggered tube machine (not shown) from a plurality of webs which are transversely perforated at intervals I along the length of the web corresponding to the desired lengths of tube to be severed. The web St is fed at a uniform speed in the direction a by means of pairs 1, 2 of feed rolls. The leading free end of the web then reaches severing means 3 for tearing a tube section S therefrom.
The severing means 3 comprise a pair of holding rolls 4, 4' and, downstream thereof, a pair of severing rolls 5, 5. The center-to-center spacing x between these pairs of rolls is less than the smallest interval I likely to be encountered between successive scorelines P, i.e., less than the length of the shortest tube section S that might be desired to be severed. This arrangement ensures that even if very short lengths are to be severed only one scoreline P of the web St will be located along the path x between the holding and tensioning rolls. The two lower rolls 4, of each pair are driven at different peripheral speeds. The holding roll 4 has a peripheral speed which is about one half percent less than the feeding speed of the web imparted by the pairs 1, 2 of feed rolls whilst the severing roll 5 has a peripheral speed of about 12 percent higher than the feeding speed. The upper rolls 4', 5' are mounted for free rotation on pivotable levers 6, 6'. The latter are pivotable by means of bars 7, 7' in synchronism with the operating sequence of the staggered tube machine so that the upper rolls are moved to and from the lower rolls. Any desired drive means may be provided for the bars 7, 7 and these are so coupled with the drive of the staggered tube machine that reciprocation of the rolls 4, 5' always takes place whilst a scoreline P is moving along the path x between the pair of holding rolls 4, 4' and the pair of severing rolls 5, 5'. Provided downstream of the severing rolls, there is a pair of tensioning rolls 8, 8 which is driven at a peripheral speed about 35 percent higher than the feeding speed of the web S! imparted by the pairs of feed rolls. The upper tensioning roll 8 is loosely rotatable at both ends in sliding pads 9 and pressed against the lower roll 8 by means of springs 10. The pressure with which the upper roll is applied to the lower roll is adjustable by altering the Spring tension with the aid of set screws 11.
The spacing y of the pair of tensioning rolls 8, 8 from the pair of severing rolls 5, 5' is such that the distance of the pair of tensioning rolls from the leading scoreline located between the rolls 4, 4' and 5, 5 during each severing operation is less than the interval t between successive scorelines P so that the leading end of the web will be gripped by the tensioning rolls whilst the leading scoreline is still passing along the path x between the rolls 4, 4 and 5, 5.
Downstream of the pair of tensioning rolls a doublebelt conveyor 12 is provided for advancing the severed tube sections S and still further downstream there is a deviator 13 which can lead each severed tube section to a selected one of a plurality of base-laying machines (not shown) for forming bases on the tube sections if the latter are to be made into bags.
The web St is fed by the feed roll pairs 1, 2 at a constant speed when the upper holding roll 4 and the upper severing roll 5 are lifted from their respective backing rolls. As soon as the leading end of the web has been engaged by the tensioning rolls 8, 8', the web is tightened between the tensioning rolls and the feed rolls because the tensioning rolls are turning at a higher speed than the feed rolls. The pull exerted on the web is limited by appropriately adjusting the pressure between the rolls 8, 8 with the aid of the set screws 11 so that the web will not tear along the leading scoreline during tightening. It is only after the rolls 4 and 5 have been lowered and applied to the web against the lower rolls 4, 5 that the tension will increase to an extent necessary for severing the leading end of the web along the leading scoreline which will be located between the rolls 4 and 5. The severed tube sectlon is led by the tensioning rolls to the conveyor 12.
Instead of adapting the tensile force exerted on the web to requirements by changing the pressure between the two tension rollers, the force could be set by means of a variable-torque friction clutch 14 which is indicated in chain-dotted lines. This has the advantage that when the tensioning rolls have attained the set tensile force they will not slide on the web as would be the case if the tensile force is limited by the pressure between the two tensioning rolls.
Instead of having the tensioning rolls 8, 8 in constant contact with the web, the upper roll 8 may, as already described for the rolls 4, 5, be freely rotatable in a pivotable lever and move to and from the roll 8 in synchronism with the operating cycle of the tube-making machine, the arrangement being such that the roll 8 will descend before the rolls 4 and 5 descend. The severed tube section S can in this case be discharged by the double belt conveyor 12 at as high a speed as may be desired as soon as the upper rolls 4, 5', 8 have been raised again. This leaves sufficient time between successive severed tube sections to enable the deflector 13 to be operated.
lclaim:
l. Severing apparatus for severing lengths of tube from a continuously fed flattened tubular web which is provided with transverse scorelines at intervals along its length, comprising a pair of holding rolls rotatable at a peripheral speed equal to or less than the feeding speed of the web, a pair of severing rolls disposed downstream of the holding rolls at a distance therefrom less than the interval between successive scorelines for advancing the leading end of the web at a higher speed than the holding rolls during each severing operation, and a pair of tensioning rolls disposed downstream of the severing rolls to engage the leading end of the web and tighten the web before each severing operation, the peripheral speed of the tensioning rolls during tightening of the web being higher than the feeding speed of the web and the tensile force exerted thereby being set so that the web entering the nip of the tensioning rolls in a slack condition will be pulled taut before each severing operation but without tearing the web along a scoreline.
2. Apparatus according to claim 1, wherein the severing rolls are effectively applied to the web only during each severing operation and the tensioning rolls are located at a distance downstream thereof so that the spacing of the tensioning rolls from the leading scoreline is less than the interval between successive scorelines.
3. Apparatus according to claim 2, wherein the tensile force of the pair of tensioning rolls is adjustable by varying the pressure between said rolls.
4. Apparatus according to claim 2, wherein the tensile force of the pair of tensioning rolls is adjustable by means of a controllable friction clutch provided in its drive.
5. Apparatus according to claim 2, wherein one of the tensioning rolls is displaceable to and from the other.

Claims (5)

1. Severing apparatus for severing lengths of tube from a continuously fed flattened tubular web which is provided with transverse scorelines at intervals along its length, comprising a pair of holding rolls rotatable at a peripheral speed equal to or less than the feeding speed of the web, a pair of severing rolls disposed downstream of the holding rolls at a distance therefrom less than the interval between successive scorelines for advancing the leading end of the web at a higher speed than the holding rolls during each severing operation, and a pair of tensioning rolls disposed downstream of the severing rolls to engage the leading end of the web and tighten the web before each severing operation, the peripheral speed of the tensioning rolls during tightening of the web being higher than the feeding speed of the web and the tensile force exerted thereby being set so that the web entering the nip of the tensioning rolls in a slack condition will be pulled taut before each severing operation but without tearing the web along a scoreline.
2. Apparatus according to claim 1, wherein the severing rolls are effectively applied to the web only during each severing operation and the tensioning rolls are located at a distance downstream thereof so that the spacing of the tensioning rolls from the leading scoreline is less than the interval between successive scorelines.
3. Apparatus according to claim 2, wherein the tensile force of the pair of tensioning rolls is adjustable by varying the pressure between said rolls.
4. Apparatus according to claim 2, wherein the tensile force of the pair of tensioning rolls is adjustable by means of a controllable friction clutch provided in its drive.
5. Apparatus according to claim 2, wherein one of the tensioning rolls is displaceable to and from the other.
US00108483A 1970-01-30 1971-01-21 Severing apparatus for severing lengths of tube from a continuously fed flattened tubular web Expired - Lifetime US3730411A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702004348 DE2004348C (en) 1970-01-30 Device for tearing off pieces of hose along lines of transverse weakening from a hose web

Publications (1)

Publication Number Publication Date
US3730411A true US3730411A (en) 1973-05-01

Family

ID=5761022

Family Applications (1)

Application Number Title Priority Date Filing Date
US00108483A Expired - Lifetime US3730411A (en) 1970-01-30 1971-01-21 Severing apparatus for severing lengths of tube from a continuously fed flattened tubular web

Country Status (4)

Country Link
US (1) US3730411A (en)
JP (1) JPS5328668B1 (en)
FR (1) FR2077126A5 (en)
GB (1) GB1333161A (en)

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3792807A (en) * 1972-07-25 1974-02-19 P Mare Band dispensing apparatus
US3818810A (en) * 1972-05-26 1974-06-25 Windmoeller & Hoelscher Apparatus for making handles for carrier bags
US3881645A (en) * 1972-10-05 1975-05-06 Sig Schweiz Industrieges Apparatus for the groupwise packaging of bags
US3942694A (en) * 1973-09-10 1976-03-09 Canadian Industries Limited Bag severing machine
US4375189A (en) * 1981-04-30 1983-03-01 Hobart Corporation Label printer
US4524659A (en) * 1981-10-23 1985-06-25 Yoshida Kogyo K. K. Apparatus for cutting continuous slide fastener chain
US4529114A (en) * 1983-09-09 1985-07-16 Moore Business Forms, Inc. Form burster
US5253560A (en) * 1989-01-19 1993-10-19 Mcdonald Gordon G Sheet dispenser
US5388746A (en) * 1990-11-09 1995-02-14 Fmc Corporation Separator/folder bag machine
US5407116A (en) * 1989-10-04 1995-04-18 Zexel Corporation Method and apparatus for cutting flat tubes
US5480083A (en) * 1992-12-18 1996-01-02 Windmoller & Hoscher Device for separating perforated sections of a tubular web
US5540369A (en) * 1993-12-07 1996-07-30 Moore Business Forms, Inc. Detaching linerless labels
US5549233A (en) * 1993-01-29 1996-08-27 C. Joyce Witt Coupon inserter
US5588280A (en) * 1989-05-08 1996-12-31 Carol Joyce Witt Coupon inserting apparatus and method
US5653022A (en) * 1994-06-20 1997-08-05 Modine Manufacturing Company Method for cutting tubing
US5803261A (en) * 1996-10-31 1998-09-08 C. Joyce Witt Three dimensional insert construction
US5845462A (en) * 1996-12-10 1998-12-08 Northfield Corporation Coupon inserter
US6135281A (en) * 1997-04-03 2000-10-24 Simhaee; Ebrahim Continuous roll of plastic bags
US6206262B1 (en) * 1994-11-14 2001-03-27 Windmöller & Hölscher Separating device for severing perforated tube sections
US6338436B1 (en) * 1992-02-13 2002-01-15 Fujitsu Limited Variable ticket and ticket printer
US6401581B1 (en) * 1993-11-19 2002-06-11 Aplicator System Ab Arrangement for feeding out fibre bundles with random fibre direction
USRE37910E1 (en) 1996-10-31 2002-11-26 C. Joyce Witt Three dimensional insert construction
US6648808B2 (en) * 2000-06-15 2003-11-18 Totani Corporation Plastic big making apparatus
US6722108B1 (en) 1989-05-08 2004-04-20 Carol Joyce Witt Coupon inserting apparatus
US20040149767A1 (en) * 2000-10-06 2004-08-05 Boehm Michael G. Web burster/inserter
US20060010835A1 (en) * 2004-07-15 2006-01-19 Shaw Kenneth L Apparatus for and method of producing and/or separating a string of interconnected packing cushions
US20080098696A1 (en) * 2006-10-26 2008-05-01 Kent Gallimore Insertion apparatus and method
US20080236995A1 (en) * 2007-03-26 2008-10-02 Lindquist Rob W Bursting apparatus and method
US20090000255A1 (en) * 2007-01-17 2009-01-01 Andreas Dandl Method and apparatus for separating foil layers as well as line for insert welding
US20090188212A1 (en) * 2008-01-28 2009-07-30 Nowakowski Anthony J Apparatus for automatic belt pressure adjustment for coupon separation
US20100024508A1 (en) * 2007-02-01 2010-02-04 Frank Opferkuch Tubes and method and apparatus for producing tubes
US20110030218A1 (en) * 2009-08-04 2011-02-10 Manfred Schmid Tube cutting apparatus and method
CN103569774A (en) * 2013-11-08 2014-02-12 无锡鼎茂机械制造有限公司 Twice-cutting bag taking device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8626179D0 (en) * 1986-11-01 1986-12-03 Deritend Eng 1983 Ltd Board treatment apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2247069A (en) * 1938-12-08 1941-06-24 Strachan & Henshaw Ltd Severing mechanism for bag making machines
US2513093A (en) * 1945-11-07 1950-06-27 Moore Business Forms Inc Strip feeding and severing machine
US2800180A (en) * 1955-07-06 1957-07-23 Uarco Inc Method of bursting unequal width portions from continuous stationery
US3543980A (en) * 1967-08-03 1970-12-01 Windmoeller & Hoelscher Apparatus for conveying workpieces of paper or plastics material sheeting,preferably for bag-making machines
US3587376A (en) * 1968-04-09 1971-06-28 Nichiban Kk Automatic adhesive tape dispenser

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2247069A (en) * 1938-12-08 1941-06-24 Strachan & Henshaw Ltd Severing mechanism for bag making machines
US2513093A (en) * 1945-11-07 1950-06-27 Moore Business Forms Inc Strip feeding and severing machine
US2800180A (en) * 1955-07-06 1957-07-23 Uarco Inc Method of bursting unequal width portions from continuous stationery
US3543980A (en) * 1967-08-03 1970-12-01 Windmoeller & Hoelscher Apparatus for conveying workpieces of paper or plastics material sheeting,preferably for bag-making machines
US3587376A (en) * 1968-04-09 1971-06-28 Nichiban Kk Automatic adhesive tape dispenser

Cited By (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3818810A (en) * 1972-05-26 1974-06-25 Windmoeller & Hoelscher Apparatus for making handles for carrier bags
US3792807A (en) * 1972-07-25 1974-02-19 P Mare Band dispensing apparatus
US3881645A (en) * 1972-10-05 1975-05-06 Sig Schweiz Industrieges Apparatus for the groupwise packaging of bags
US3942694A (en) * 1973-09-10 1976-03-09 Canadian Industries Limited Bag severing machine
US4375189A (en) * 1981-04-30 1983-03-01 Hobart Corporation Label printer
US4524659A (en) * 1981-10-23 1985-06-25 Yoshida Kogyo K. K. Apparatus for cutting continuous slide fastener chain
US4529114A (en) * 1983-09-09 1985-07-16 Moore Business Forms, Inc. Form burster
US5253560A (en) * 1989-01-19 1993-10-19 Mcdonald Gordon G Sheet dispenser
US5784861A (en) * 1989-05-08 1998-07-28 C. Joyce Witt Coupon inserting apparatus and method
US5588280A (en) * 1989-05-08 1996-12-31 Carol Joyce Witt Coupon inserting apparatus and method
US5941053A (en) * 1989-05-08 1999-08-24 Carol Joyce Witt Coupon inserting apparatus and method
US6722108B1 (en) 1989-05-08 2004-04-20 Carol Joyce Witt Coupon inserting apparatus
US5495972A (en) * 1989-10-04 1996-03-05 Zexel Corporation Method and apparatus for cutting flat tubes
US5407116A (en) * 1989-10-04 1995-04-18 Zexel Corporation Method and apparatus for cutting flat tubes
US5388746A (en) * 1990-11-09 1995-02-14 Fmc Corporation Separator/folder bag machine
AU670492B2 (en) * 1990-11-09 1996-07-18 Fmc Corporation Separator/folder bag machine
US6338436B1 (en) * 1992-02-13 2002-01-15 Fujitsu Limited Variable ticket and ticket printer
US5480083A (en) * 1992-12-18 1996-01-02 Windmoller & Hoscher Device for separating perforated sections of a tubular web
US5549233A (en) * 1993-01-29 1996-08-27 C. Joyce Witt Coupon inserter
US6401581B1 (en) * 1993-11-19 2002-06-11 Aplicator System Ab Arrangement for feeding out fibre bundles with random fibre direction
US5540369A (en) * 1993-12-07 1996-07-30 Moore Business Forms, Inc. Detaching linerless labels
AU683154B2 (en) * 1994-06-20 1997-10-30 Modine Manufacturing Company Method and apparatus for cutting tubing
US5653022A (en) * 1994-06-20 1997-08-05 Modine Manufacturing Company Method for cutting tubing
US6061905A (en) * 1994-06-20 2000-05-16 Modine Manufacturing Company Method and apparatus for cutting tubing
US6206262B1 (en) * 1994-11-14 2001-03-27 Windmöller & Hölscher Separating device for severing perforated tube sections
US5803261A (en) * 1996-10-31 1998-09-08 C. Joyce Witt Three dimensional insert construction
USRE37910E1 (en) 1996-10-31 2002-11-26 C. Joyce Witt Three dimensional insert construction
US6082079A (en) * 1996-12-10 2000-07-04 Northfield Corporation Bursting apparatus
US5966906A (en) * 1996-12-10 1999-10-19 Northfield Corporation Coupon inserter
US5845462A (en) * 1996-12-10 1998-12-08 Northfield Corporation Coupon inserter
US6135281A (en) * 1997-04-03 2000-10-24 Simhaee; Ebrahim Continuous roll of plastic bags
US6379292B1 (en) 1997-04-03 2002-04-30 Ebrahim Simhaee Continuous roll of plastic bags
US6648808B2 (en) * 2000-06-15 2003-11-18 Totani Corporation Plastic big making apparatus
US7032774B2 (en) 2000-10-06 2006-04-25 Northfield Corporation Web burster/inserter
US20040149767A1 (en) * 2000-10-06 2004-08-05 Boehm Michael G. Web burster/inserter
US20090294501A1 (en) * 2004-07-15 2009-12-03 Storopack, Inc. Apparatus For And Method Of Producing And/Or Separating A String Of Interconnected Packing Cushions
US7571589B2 (en) * 2004-07-15 2009-08-11 Storopack, Inc. Apparatus for and method of producing and/or separating a string of interconnected packing cushions
US20060010835A1 (en) * 2004-07-15 2006-01-19 Shaw Kenneth L Apparatus for and method of producing and/or separating a string of interconnected packing cushions
US20080098696A1 (en) * 2006-10-26 2008-05-01 Kent Gallimore Insertion apparatus and method
US7950204B2 (en) * 2007-01-17 2011-05-31 Kiefel Gmbh Method and apparatus for separating foil layers as well as line for insert welding
US20090000255A1 (en) * 2007-01-17 2009-01-01 Andreas Dandl Method and apparatus for separating foil layers as well as line for insert welding
US8561451B2 (en) 2007-02-01 2013-10-22 Modine Manufacturing Company Tubes and method and apparatus for producing tubes
US20100024508A1 (en) * 2007-02-01 2010-02-04 Frank Opferkuch Tubes and method and apparatus for producing tubes
US20080236995A1 (en) * 2007-03-26 2008-10-02 Lindquist Rob W Bursting apparatus and method
US7540125B2 (en) 2007-03-26 2009-06-02 Northfield Corporation Bursting apparatus and method
US7603830B2 (en) * 2008-01-28 2009-10-20 Carol Joyce Witt Apparatus for automatic belt pressure adjustment for coupon separation
US20090188212A1 (en) * 2008-01-28 2009-07-30 Nowakowski Anthony J Apparatus for automatic belt pressure adjustment for coupon separation
US20110030218A1 (en) * 2009-08-04 2011-02-10 Manfred Schmid Tube cutting apparatus and method
CN103569774A (en) * 2013-11-08 2014-02-12 无锡鼎茂机械制造有限公司 Twice-cutting bag taking device
CN103569774B (en) * 2013-11-08 2015-12-16 无锡鼎茂机械制造有限公司 Twoly cut bagging apparatus

Also Published As

Publication number Publication date
GB1333161A (en) 1973-10-10
FR2077126A5 (en) 1971-10-15
JPS5328668B1 (en) 1978-08-16
DE2004348A1 (en) 1971-11-25
DE2004348B2 (en) 1971-11-25

Similar Documents

Publication Publication Date Title
US3730411A (en) Severing apparatus for severing lengths of tube from a continuously fed flattened tubular web
US4063505A (en) Papering apparatus in rotary printing press
KR950002516B1 (en) Method of producing rolls or logs of web material and machine for implementing said method
KR930011434B1 (en) Rewinding machine for the formation of rolls or logs, and winding method
US4023470A (en) Method and apparatus for continuous production of bags from thermoplastic film
US4083747A (en) Apparatus for making stacks of plastics bags
JPS6348679B2 (en)
US2626145A (en) Tissure interfolding method and apparatus
US3727814A (en) Tear-off apparatus for successively tearing off a length from the leading end of a moving flattened tubular web of material
US5388746A (en) Separator/folder bag machine
US4144624A (en) Machine for expanding metal webs
US3557156A (en) Sectional drive apparatus for continuously feeding an elastic material
US2531619A (en) Machine for decurling labels
US3057527A (en) Sheet and bag separating and stacking mechanism
US1290800A (en) Apparatus for folding and interleaving paper sheets.
US4068998A (en) Apparatus for processing continuously-fed plastics material
US4015838A (en) Apparatus and method of forwarding sheet from paper or similar material
US6113526A (en) Bag-folding apparatus
US2710045A (en) Corrugated paper web guiding and tensioning apparatus
JP3786263B2 (en) Sheet take-out device
US1927585A (en) Paper feeding mechanism
US1961266A (en) Method and apparatus for cutting and folding paper
US1718145A (en) Sheet-material feeding and severing apparatus
EP1205414B1 (en) Peripheral rewinding machine and method for producing logs of web material
US1956807A (en) Paper feeding mechanism