US3486707A - Apparatus and method for winding,cutting and removing web materials - Google Patents

Apparatus and method for winding,cutting and removing web materials Download PDF

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Publication number
US3486707A
US3486707A US3486707DA US3486707A US 3486707 A US3486707 A US 3486707A US 3486707D A US3486707D A US 3486707DA US 3486707 A US3486707 A US 3486707A
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Prior art keywords
core bar
cutting
assembly
web
winding
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Expired - Lifetime
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English (en)
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John Mccreary
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
    • B65H19/2238—The web roll being driven by a winding mechanism of the nip or tangential drive type
    • B65H19/2246—The web roll being driven by a winding mechanism of the nip or tangential drive type and the roll being supported on two rollers
    • 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
    • Y10T83/929—Tool or tool with support
    • Y10T83/9317—Endless band or belt type

Definitions

  • Apparatus or devices which will provide means for cutting a web material as it is receive-d from a source but such devices do not provide for the automatic delivery and positioning of an element for winding the web material after it is cut without the necessity of stopping the feed thereof so as to permit the removal of the wound web material from the apparatus while starting a new roll.
  • the apparatus of this invention overcomes the many disadvantages of the devices presently used in the textile industry and other industries employing continuous feed of web material.
  • the present device allows for the continuous feed of the web material from its source without the interruption of any of the machinery for treating or processing the material while being wound on a core rod or tube.
  • the device is relatively inexpensive to manufacture, employs a novel means for feeding a new core bar onto the traveling web material and a novel means for cutting the material so that the cut end will automatically start to wind on a new core bar thereby allowing for the removal or dofling of the wound material from the device without interruption of the web material from its feed source.
  • damage to the treated web material is obviated and maximum efficiency is achieved.
  • My invention generally contemplates a new method and apparatus for continuously winding and dofiing web material while providing means for cutting the material and starting a new roll without interrupting the feed of the web material from its source.
  • FIG. 1 is a side elevational view with portions broken away and portions represented in phantom to more clearly illustrate the upper assembly of the apparatus;
  • FIG. 3 is a perspective view of the assembly for driving the rack and core bar retaining housing for moving the wound material from one position to another on the apparatus;
  • FIG. 4 is an enlarged side elevational fragmentary view of the lowering mechanism for positioning a core bar on the core bar release mechanism prior to its use for winding the material on the apparatus;
  • FIG. 6 is a fragmentary elevational view of the control mechanism for operating the knife assembly
  • FIG. 7 is a perspective fragmentary view of the pneumatic system for actuating the knife and core bar as semblies
  • FIG. 8 is an electrical schematic diagram for operating the apparatus.
  • FIG. 9 is an enlarged fragmentary view in elevation of a portion of a knife blade illustrating the manner in which the teeth of the knife cut the web material.
  • FIG. 1 illustrates the assembly of the apparatus in which the web material, for example textile material, is received from a'feed source, not shown, onto the apparatus with the material being transported across the winding rolls prior to its completion.
  • the web material for example textile material
  • the apparatus comprises the following sub-assemblies:
  • the winding assembly 12 comprises a plurality of rolls suitably mounted for rotation on a frame, not shown.
  • the winding rolls preferably comprise four rolls 20, 21, 22 and 23, each roll being similar in construction and having center shaft assemblies 24, 25, 26 and 27 mounted at each end of a roll, as seen at roll 20.
  • the outer shell 28 of each roll is rigidly mounted to the center shaft assembly by end plates 29 so that the shell of each roll rotates with its respective shaft.
  • the shell of the roll may be made of a different material than the shaft, such as a light weight material, for example, synthetic rubber, synthetic elastomeric materials, such as polyamide, or the like. As illustrated in FIG.
  • the rolls are spaced from each other a sufficient disance substantially equal to or less than the diameter of the core bar 2 which is employed for winding the material therearound and which will be discussed more fully hereinafter.
  • the chain and sprocket assembly coupled to roll 23, as seen in FIG. 2, provides drive means for roll 23.
  • Rolls 20, 21, 22 and 23 are coupled by suitable chain and sprocket assemblies as shown in dotted lines in FIG. 2 such that all of the rolls will rotate at substantially the same speed and in the same direction.
  • Shaft 50 is disposed beneath the winding assembly and extends across the width of the frame so that its end portions extend beyond shells 28 of the winding assembly and is mounted for rotation on the apparatus frame by a plurality of bearing assemblies, not shown.
  • Chain sprockets 52 are mounted at each end of shaft 50.
  • Endless chain 48 is mounted around chain sprockets 46 and 52 so that when shaft 50 is rotated sprockets 46 and 52 will rotate and thereby cause the transverse movement of racks 40 either in a forward or backward direction depending upon the rotation of shaft 50.
  • Drive means 54 comprises a reversible electric motor 56 having a driving shaft extending therefrom, not shown, with the end of the shaft mounted to gear box assembly 58.
  • Knife assembly 16 is pneumatically driven and is actuated by electrically operated valves. Knife assembly 16 comprises an endless cutting blade or knife 90 which is mounted for rotation on driven pulleys 92 by shaft or spindle 94. Shaft 94 is mounted for rotation on a supporti g m 6 and ex ends th reth sus t en si ea t e pulley 92 and the other end mounting pulley 98. Electric motor having shaft 102 extending therefrom has mounted at its end pulley 104 so that belt 106 may be mounted around pulleys 104 and 98 for rotating knife 90 around pulleys 92.
  • Pivotally connected between supporting arm 96 and the other end 116 of rod 114 is a second linkage 117 which is pivotally mounted at its ends 118 and 119 by pins 120 and 121.
  • Mounted on each side of apparatus frame are pneumatic cylinder assemblies 122.
  • Piston cylinders 126 are pivotally mounted on block 128 at one end thereof by pin 130.
  • Piston rods 132 which extend from the other end of cylinders 126 are pivotally mounted by pins 134 on the under side of supporting arm 96.
  • piston rods 132 are extended in an outward. direction so that supporting arm 96 is moved upwardly in the direction of the knife shown in phantom in FIG. 5 with mechanical linkage members 114 and 117 pivoting so as to form a substantially straight line.
  • Knife guide 136 is made of a plastic material and has a slot or opening formed along the longitudinal axis of the guide having a depth substantially equal to the width of the cutting blade 90 so that only the cutting edge 91 of knife 90 extends above the knife guide. Knife guide 136 is mounted on supporting arm 96 at each end'thereof by mounting bracket 138. A second knife guide 136 is mounted on the other side of knife'90 in a similar manner and having a similar configuration. Knife guide 136 prevents knife 90 from vibrating in a sinuous manner between pulleys 92 on which the knife is mounted for rotation. The cutting edge 91 of knife 90 is scalloped and is best illustrated in FIG. 9 which shows the points 93 of cutting edge 91 extending through web material 1.
  • Knife 90 is an endless cutting band and therefore the width of the material is not a limiting factor in cutting the web material 1 since the effective cutting stroke of knife 90 is approximately one-half inch. Knife 90 is rotated at a relatively high speed so that the time required to cut the one-half inch of material is substantially instantaneous thereby effecting the cutting of the web material in a substantially straight line.
  • Core bar feeding assembly is generally illustrated in FIG. 1 with detailed views in FIGS. 3 and 4 showing various components and operation of the assembly.
  • Side panels 140 are mounted on each side of apparatus 10 'ad-. jacent the ends of the center shafts of the winding rolls,
  • a core ba chut 142 which defi e a s b t nt a y te path illustrated in dotted lines in FIG. 1 is mounted on the inner surface of panel 140 so that the discharge end is positioned over the center line between winding rolls 20 and 21.
  • a pneumatic-ally operated valve 144 is mounted to a piston cylinder 146 having fluid inlet and outlet openings 147 and 148. Piston rod 149 is pivotally connected at its outer end to plate 150.
  • a vertically extending rod or bar 157 which extends to a point which intercepts chute 142 at its upper end.
  • core bar 2 is released by cam 154 core bar 2 will roll down the chute until it is stopped by vertical bar 157.
  • shifting assembly 14 is moved to the start position as shown in FIG. 1 so that core bar housing 45 is positioned below the exit point of chute 142 core bar 2 is controlled during its descent along chute 142 at a relatively slow rate.
  • vertical rod 157 releases core bar 2 so that it contacts the pneumatic core bar positioning device 158 as seen in FIG 4.
  • This device comprises a substantially horizontally extending bar 159 which is rigidly mounted on a rotatable shaft 160.
  • a second member 162 which is pivotally mounted to an air cylinder assembly 163.
  • the weight of core bar 2 causes horizontal rod 159 to move in a downward direction as shown by the arrow in FIG. 5 and into core bar retaining housing 45 mounted on shifting assembly 14. Due to the weight of core bar 2 air or other pneumatic fluid is expelled from the air cylinder assembly 163. Rod 159 continues in a downward direction until core bar 2 is dropped onto core bar release pin 164 which is pneumatically operated and electrically actuated. When core bare 2 contacts core bar release pin 164, core bar 2 is in position for starting a newroll of web material after the web material is cut by the knife assembly.
  • Shifting assembly 14 is in the form of a channel similar in design to chute 142.
  • a shifter door 166 forms one wall of the channel at the forward end of core bar hous ing 45 and is pivot-ally mounted .at its upper end.
  • Mounted on its outer face and extending upwardly is bar 168 having wheel 170 mounted at its outer end.
  • shifter door 166 is closed and held in that position by a fixed track 172 as seen in FIG. 1.
  • shifter door 166 is held closed by fixed track 172.
  • wheel 170 disengages from moveable member 178 and does not contact any other surface so as to permit shifter door 166 to pivot outwardly so as to release core bar 2 to cause the same to fall over the material web between rollers 20 and 21
  • the weight of the core bar will cause the material web to sag between rollers 21 and 22 and after the web material is severed by knife 90, the rotation of rollers 21 and 22 will cause the new leading edge of the web material to wind about the new core bar.
  • the web material will continue to be wound between driven winding rolls 22 and 23.
  • wheel of shifter door 166 will contact the surface of fixed track 172 so as to close shifter door 166.
  • pivotally mounted track 174 means are provided for opening shifter door 166 which is pivotally mounted at one end and is moved to an open position by a spring-loaded hinge. Further, by employing pivotal track 174 means are provided for expanding the width of the roll of web material to a greater diameter than the distance between fixed track 172 and the upper surface of the winding rolls.
  • Pivotal track 174 is mounted on rotatable shaft 176 at one end thereof.
  • pivotal arm 180 is mounted on rotatable shaft 176 at its inner end and is pivotally mounted to piston rod 181 at its outer end with piston rod 181 being disposed in piston cylinder 182.
  • Pivotal track 174 is pneumatically controlled by piston assembly through pneumatic valve 184 which is electrically actuated.
  • shifting assembly 14 When shifting assembly 14 is at the rest or start position, i.e., in which core bar housing 45 is disposed over the center line between rolls 20 and 21, the apparatus is set or has completed its cycle for receiving the next core bar which has been positioned on ,core bar releasing pin 164.
  • FIG. 7 illustrates the pneumatic system for actuating the knife and core bar assemblies, in which air or other gasses may be used, air being less expensive is preferred.
  • Air is supplied to the device through air supply line from a source not shown.
  • Air supply line 190 is connected to an electrically operated four-way valve assembly 191 by any suitable coupling means.
  • Flexible tube 192 connects air supply line 190 to the knife cutting assembly 16.
  • Air passing through valve assembly 191 is conducted through pneumatic tube 193, through flexible air inlet tubes 194 to the inlet opening 195 of cylinders 126 of the knife cutting assembly.
  • electrical solenoids 196 are energized valve assembly 191 is opened to permit air to pass into cylinder 126.
  • penumatic valve 206 supplies the necessary air pressure for operating the shifter release pin 164 when electrically actuated.
  • Pneumatic valve 208 operates the core bar lowering assembly when electrically; pneumatic valve 184 actuates the shifter door locking assembly and pneumatic valve 144 operates the core bar release mechanism.
  • FIG. '8 illustrates the electrical schematic diagram for the device when the web is about to be cut.
  • Theknife motor 100 starts, relays knife up (KU) and time delay relay (TDR) are energized but knife assembly 16 cannot move up to cut the web material until relay (TDR) times out and solenoid 196 on pneumatic valve assembly 191 is energized. After relay (TDR) times out, the cutting assembly swings arcuately upwardly between winding rolls 21 and 22 toward web 1. However, prior to cutting web 1 limit switch LS27 is closed energizing the solenoids to withdraw the core bar release pins 164 to drop core bar 2 onto web 1 producing tension on the web as illustrated in FIG. 5 so that knife blade 90- will penetrate and sever or cut web 1 as illustrated in FIG. 9.
  • limit switch LS-8 is closed energizing the knife down relay (KD) so that the knife cutting assembly will return to its rest position as shown in FIG. 1.
  • relay (KD) is energized
  • limit switch LS-3 is opened deenergizing relays (KU) and (BC) to stop motor 100 and return the knife cutting assembly to the down" position.
  • core bar 2 drops between winding rolls 20 and 21 and immediately a new roll of web material is winding around core bar 2 and the finished roll of web material is resting on revolving rolls 22 and 23 and the finished roll is ready to be dotted and removed to its place of storage or its next sequence of operation for treating the material.
  • limit switch LS-16 With the cutting assembly in the rest position, that is, with the knife in the down position, limit switch LS-16 is closed and limit switch LS2 is opened. With the shifting assembly at its raised or start position limit switches LS29, LS7, LS- and LS13 are closed and limit switch LS17 is opened.
  • button (PB-2) is pressed to energize relay (SB) and instantly relay (SB-j) contacts are opened releasing the magnetic brake (MB).
  • Relay (SB-k) is closed to magnetize overriding clutch 64. Also relay (SBZ) is closed and the magnetic brake (MB) contactor energizes the motor to revolve in the proper rotation.
  • limit switch LS31 As shifting assembly 14 moves away from its rest position limit switch LS31 is closed and energizes the solenoid to bring the core lowering arm assemby 158 to the UP position as seen in FIG. 5. Also pivotally mounted track 174 is brought to the horizontal position and is held by the time delay relay (TDRb).
  • TDRb time delay relay
  • limit switch LS13 When shifting assembly 14 reaches the position shown in dotted lines in FIG. 1 limit switch LS13 is opened and deenergizes relay (SB). With shifting assembly 14 at the position shown in dotted lines in FIG. 1 limit switch LS-24 is opened to deenergize the solenoid to extend core bar releasing pin 164 so as to hold core bar 2 thereon. At the same time limit switch LS-19 is closed.
  • Limit switch LS17 is a safety limit switch to limit the size of the roll of web material being wound on core bar 2. If the operator fails to push button (PB-2), safety limit switch LS17 will actuate the shifting assembly 14 so that it will return to its raised position so that the web material can be out. When shifting assembly 14 is at its raised position the following occurs: limit switch LS18 is opened thus stopping the movement of the shifting assembly by dllrgizing relay (SF)this releases clutch 64 and 8 applies brake 80. When limit switch LS-31 is opened the lowering core arm slowly lowers core bar 2 to release core bar release pin and the solenoid is energized to put the shifter door locking bar 174 in a vertical position. With limit switch LS7 closed and limit switch LS17 opened the apparatus is ready to repeat the sequence of cutting the web material.
  • PB-2 push button
  • Apparatus for continuously winding a web material from a web source onto a core bar and for cutting the same comprising:
  • web winding means for forming a roller of web material received from the web source rotatably coupled to the support structure, said web winding means comprising a plurality of elongated spaced rolls disposed substantially in the same plane parallel to each other, at least two of said rolls being spaced apart from each other a distance less than the diameter of said core bar so as to support the core bar between adjacent rolls and to provide means whereby the core bar is rotated in the direction of rotation of said winding means so that the web material is wound therearound to form a roll; shifting means for moving the web material transverse to the axis of rotation of the web winding means;
  • web cutting means shiftably mounted on the support structure transverse to the axis of rotation of the winding mean and adapted to be shifted from an inoperative position to an operative position wherein the cutting means in its operative position cuts the web material in substantially a straight line across the width of the material;
  • core bar feed means coupled to the support structure and adapted to discretely feed and position a core bar onto the web material
  • first actuator means for actuating the shifting means
  • the second actuator means and the third actuator means operate substantially simultaneously so as to position the core bar into the web material while the cutting means transversely cuts the web material and the cut end of the web material is wound around the core bar by the winding means to form a new roll of web material without interruption from its source.
  • the shifting means comprises a first and second rack assembly spaced from each other and mounted on the support structure in spaced relation to the winding means, the rack assembly including drive means for shifting the rack assemblies transverse to the axis of rotation of the winding means whereby a roll of web material being wound on the core bar is shifted from a first winding position to a second winding position remote from the first.
  • the core bar retaining means comprises a rotatable member mounted on the upper end of the guide member and having stop means formed thereon for retaining the core bar in a position prior to its transfer onto the web winding means, a reciprocating assembly coupled to the rotatable member so that the assembly when actuated rotates the retaining member from its core bar retaining position to its core bar releasing position; the core bar retaining means having actuating means for pneumatically reciprocating the rotatable member.
  • the core bar feeding means includes a core bar lowering assemblydisposed adjacent each core bar guide member and extends transversely across the path of the guide channel formed therein; the lowering assembly being mounted on the support structure and adjacent the lower end of the core bar guide member so that when the core bar is transferred from the upper end to the lower end of the guide member it moves along the path of the channel formed in the guide member, the lowering assembly contacting the core bar to retard the movement thereof and position the core bar on the retaining pins disposed transverse to the core bar guide member and in the path of the guide channel, the retaining pins being mounted so as to be shiftable to and away from the guide member; the pins being pneumatically operated and electrically actuated so that when the pins are actuated to move away from the path of the guide channel, the core bar is released and is transferred onto the web material with the core bar being retained in the retaining housing mounted on the shifting means.
  • the lowering assembly includes a vertically extending bar mounted on each rack assembly adjacent the core bar retaining housing, each bar being spaced from the guide member and extending upwardly to intersect the path of channel formed in the guide member at its upper end so that when the shifting means moves from the second winding position to its first winding position, the core bar contacts the vertical bar as it moves downwardly along the path of the guide channel and thereafter is released onto the lowering assembly to position the core bar onto the shiftable pins prior to its release onto the web material.
  • the cutting means comprises an endless cutting band having a scalloped cutting edge and spaced from the web material when the cutting means is in its inoperative position, the cutting edge having a plurality of raised generally equally spaced points and generally concave portion forming a substantially continuous cutting surface between the points, whereby when the cutting means is in its operative position the cutting edge will initially penetrate and cut the web material in a vertical direction and thereafter cut the web material in a substantially transverse direction.
  • Apparatus for continuously winding and cutting a web material received from a web source comprising:
  • web winding means for forming a roll of web material received from the web source and rotatably coupled to the support structure; web shifting assembly including a first and second rack assembly spaced from each other and mounted on the support structure in spaced relation to the winding means, rack drive means coupled to the assembly for shifting the assembly transverse to the axis of rotation of the winding means so as to shift a roll of web material being wound on the winding means from a first winding position to a second winding position remote from the first, a core bar retaining housing mounted on the end of each rack assembly and having means for releasably engaging the ends of the core bar when the shifting assembly is moved from its first position to its second position; web cutting means shiftably mounted on the support structure transverse to the axis of rotation of the winding means and adapted to be shifted from an inoperative position to an operative position wherein the cutting means in its operative position cuts the web material in substantially a straight line across the width of the material; core bar feed means coupled to the support structure and adapted to
  • Apparatus for continuously winding and cutting a same o i i th steps of; web material received from a web source comprising: continuously winding the b material on a web winda PPP Structure; ing assembly comprising a plurality of elongated web winding means for forming a roll of web vmaterial spaced rows disposed substantially in the same Plane received from the web source and rotatably coupled to the support structure; shifting means for moving the web material transverse to the axis of rotation of the web winding means; i web cutting means shiftably mounted on the support parallel to each other, at least two of said rows being spaced apart from each other a distance less than the diameter of said core bar forming a roll of web material about a core bar disposed between said spaced structure transverse to the axis of rotation of the F i Winding means and adapted to be Shifted from an shifting the roll of web material from a first
  • Cited core bar retaining means formed on the upper end of a guide member for retaining the core bar in posi- UNITED STATES PATENTS tion prior to its transfer on the web winding means, the lower end of the guide member having means 1 5/1866 Buschman 83-661 for retaining a core bar prior to its positioning on the 3/1934 Bessmer et a1 242*66 Web material; 2,676,764 4/1954 Aulen 242-56 first actuator means for actuating the shifting means; 3O09376 11/1961 R et a1 '24256 XR second actuator means for actuating the core bar feed 3O49 311 8/1962 Birch 242-56 2 123 522 5322 at "a en: rc thlrd actuator means for actuating the cutting means, 3,292,524 1/1966 Couzens et al- 242 56 whereby the second actuator means and the third actuator means operate substantially

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US3486707D 1968-01-08 1968-01-08 Apparatus and method for winding,cutting and removing web materials Expired - Lifetime US3486707A (en)

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US69623268A 1968-01-08 1968-01-08

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3817467A (en) * 1969-06-11 1974-06-18 J Dambroth Device for continuous winding of continuously running webs of material
US4204650A (en) * 1978-01-23 1980-05-27 Magnat Corp. Apparatus for replacing rotating mandrels on which a web is wound

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58148140A (ja) * 1982-02-24 1983-09-03 Rengo Co Ltd サ−フエ−スワインダ
DE102011007092B4 (de) * 2011-04-08 2019-02-14 PSA Technology S.à.r.l. Rückwärts-Tragwalzenwickler zum Aufwickeln von bahnförmigen Materialien zu Rollen
CN114229543A (zh) * 2021-12-23 2022-03-25 苏州中科天蚕机械有限公司 一种全自动收卷机
CN116834306B (zh) * 2023-07-28 2024-06-14 苏州苏瑞膜纳米科技有限公司 一种多层工业滤水膜的卷膜机

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US54681A (en) * 1866-05-15 Improvement in machines for cutting cloth
US1951182A (en) * 1930-04-15 1934-03-13 Hammermill Paper Co Four-drum winder
US2676764A (en) * 1950-06-19 1954-04-27 Eddystone Machinery Company Web winder
US3009376A (en) * 1958-12-12 1961-11-21 Werner P Rose Hold down pin bar assembly for continuous batcher
US3049311A (en) * 1959-10-22 1962-08-14 Birch Brothers Inc Apparatus for web winding
US3167268A (en) * 1962-01-22 1965-01-26 Birch Brothers Inc Automatic cut-off web winder apparatus
US3199393A (en) * 1963-06-20 1965-08-10 Birch Brothers Inc Chain cutter for web materials
US3292524A (en) * 1965-09-13 1966-12-20 Gen Electric Exhaust duct connection for ventilating hood

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US54681A (en) * 1866-05-15 Improvement in machines for cutting cloth
US1951182A (en) * 1930-04-15 1934-03-13 Hammermill Paper Co Four-drum winder
US2676764A (en) * 1950-06-19 1954-04-27 Eddystone Machinery Company Web winder
US3009376A (en) * 1958-12-12 1961-11-21 Werner P Rose Hold down pin bar assembly for continuous batcher
US3049311A (en) * 1959-10-22 1962-08-14 Birch Brothers Inc Apparatus for web winding
US3167268A (en) * 1962-01-22 1965-01-26 Birch Brothers Inc Automatic cut-off web winder apparatus
US3199393A (en) * 1963-06-20 1965-08-10 Birch Brothers Inc Chain cutter for web materials
US3292524A (en) * 1965-09-13 1966-12-20 Gen Electric Exhaust duct connection for ventilating hood

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3817467A (en) * 1969-06-11 1974-06-18 J Dambroth Device for continuous winding of continuously running webs of material
US4204650A (en) * 1978-01-23 1980-05-27 Magnat Corp. Apparatus for replacing rotating mandrels on which a web is wound

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GB1205299A (en) 1970-09-16
DE1900750A1 (de) 1969-07-31

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