US3319353A - Pressing and drying devices for corrugated board manufacturing equipment - Google Patents

Pressing and drying devices for corrugated board manufacturing equipment Download PDF

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US3319353A
US3319353A US355987A US35598764A US3319353A US 3319353 A US3319353 A US 3319353A US 355987 A US355987 A US 355987A US 35598764 A US35598764 A US 35598764A US 3319353 A US3319353 A US 3319353A
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corrugated board
air
board
pressing
manufacturing equipment
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US355987A
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Matsunami Hiroshi
Yagi Yoshikazu
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NIWA MACHINERY CO Ltd
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NIWA MACHINERY CO Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/2845—Details, e.g. provisions for drying, moistening, pressing
    • B31F1/285—Heating or drying equipment

Definitions

  • This invention relates to devices for pressing and heating corrugated board to be installed in a corrugating equipment adapted to dry a semi-fabricated corrugated board being fed between an endless conveyor belt and a plurality of hot plates arranged in the direction of feed, and, more particularly, to devices adapted to apply uniform pressure on said board by way of the compressed air blown into a plurality of air chambers with their bottoms open as disposed on the upper side, as opposed to the contact side with respect to the board being fed, of the conveyor belt so that a closer contact may be attained between said hot plates and the corrugated board being so fabricated.
  • the conventional device designed for stated purpose merely comprises a plurality of presser rolls arranged on the back surface of the conveyer belt so as to press the board being fed under uniform pressure.
  • This invention has as one of its objects to eifect uniform and increased drying of the corrugated board which has been fabricated and bonded together but has not yet been sufiiciently dried. Other objects and advantages of this invention will become apparent as the following description proceeds.
  • FIG. 1 represents a front view, in section, of an embodiment of this invention for pressing and heating corrugated boards (first example of application);
  • FIG. 2 is a plan view of the same device of this invention.
  • FIG. 3 is a side elevation of the above-mentioned device of this invention.
  • FIG. 4 represents a front elevation of another embodiment of the invention for pressing and heating corrugated boards (second example of application);
  • FIG. 5 is a front sectional view, on exaggerated scale, of the air passageway therefor;
  • FIG. 6 is a side elevation, on exaggerated scale, of said air passageway.
  • FIG. 7 is a cross-sectional plan View of the butting section of heating plates.
  • FIGS. 1-3 freshly glued, double faced, corrugated board 81 is paid out of a conventional manufacturing means designated in FIG- URE 6 as the board supply and the glue means.
  • the board contacts the belt 64 advancing around 'belt roll 62 and is guided into the space defined by and between heating plates 63 and the conveyor belt 64.
  • a remarkable feature of this invention lies in its numerous air chambers 75 that are arranged lengthwise on the upper side of a conveyor belt 64 running in contact with the heating plates 63. These air chambers are open at their bottoms, each being so adapted that the comice pressed air that has been sent out of a blower 76 is forced into these air chambers and applies direct pressure to the upper surface of the belt.
  • blower 76 constantly supplies a sufiicient volume of compressed air, its pressure operates on the upper surface of the belt and, accordingly, on the double faced corrugated board lying immediately below the same, thus forcing said corrugated board into intimate contact with the heating plates 63.
  • numeral 78 is an elastic material which, by virtue of its elasticity, is always kept in touch with the upper surface of the belt and substantially prevents leakage of the air.
  • the freshly glued board is then guided into the space defined by and between heating plates 63 and conveyor belt 64, wherein it goes through a heating and drying process as has already been explained hereinbefore.
  • a plurality of air chambers with their bottoms open are arranged end-to-end on the conveyer belt 64.
  • the compressed air forced into said air chambers acts directly on the upper surface of the conveyer belt, thereby forcing the underlying corrugated board against the heating plates 63.
  • an air blower '79 is rigidly secured to the lower side of the frame 65 and the compressed air that is sent out of said air blower 79 is led through a pipe 80 in the direction of arrow 1'.
  • the compressed air plays a triple role of acting directly on the entire upper surface of the conveyer belt 64, of applying uniform pressure to the underlying double faced corrugated board 81 through the thickness of the conveyer belt, and of heating and drying the double faced corrugated board from both sides, that is, from the heating plates 63 and from the air chambers.
  • the conveyer belt is made of a porous material, e.g. thick fabric, through the texture of which some of the compressed air flows to the upper surface of the double faced corrugated board, to be finally discharged through the spaces 82 at both edges of the corrugated board in the direction k.
  • the air that is discharged into said spaces 82 flows into passageways 83, whence it further flows to vertical passageways 84, and, then, to a main duct 85.
  • the air is heated while it flows through the passageways 83 and 84 and the resulting hot air returns to the abovementioned air blower 79 by way of a pipe 86 through a control valve 87.
  • the control valve 87 helps adjust the volume of the air, while the elastic material 83 secured rigidly to the lower edges of each air chamber serves to minimize the leakage of the air.
  • the compressed air that is supplied to the air chambers is forced through the fine meshes of the conveyer belt, and while circulating in the described manner, the air not only applies uniform pressure to the upper surface of the conveyer belt but also effectively heats the double faced corrugated board from the upper side thereof.
  • a double faced corrugated board manufacturing equipment comprising a plurality of hot plates and an endless conveyer belt, in which a double faced corrugated board is fed through the space defined by said hot plates and said conveyer belt so as to heat and dry the board, the arrangement of devices adapted to press and heat the corrugated board, said devices comprising a plurality of fluid chambers having open bottoms and disposed on the conveyer belt in the direction of feed, a blower, and a fluid forced by said blower into said chambers, whereby a constant pressure is exerted uniformly onto the entire upper surface of the corrugated board through the thickness of the conveyer belt.

Description

May 16, 1967 HIROSHI MATSUNAMI ET AL 3,319,353
PRESSING AND DRYING DEVICES FOR CORRUGATED BOARD MANUFACTURING EQUIPMENT Filed March 30, 1964 SUPPLY V a GLUE g; MEANS 65 I A u BI 84 HEATING PLATES 6F 64? -M 2 I T AJII F JLILIM BOARD-T s fl l BI 3o 1 80 (I MEANS 3g. 86 79 65 eO L79 is FIG.4.
ir/QE MV ATTORNEY.
United States Patent PRESSING AND DRYING DEVICES FOR CORRU- GATED BOARD MANUFACTURING EQUIPMENT Hiroshi Matsunami and Yoshikazu Yagi, Osaka, Japan,
assignors to Niwa Machinery Company, Ltd., Osaka, Japan Filed Mar. 30, 1964, Ser. No. 355,987 Claims. (Cl. 34--155) This invention relates to devices for pressing and heating corrugated board to be installed in a corrugating equipment adapted to dry a semi-fabricated corrugated board being fed between an endless conveyor belt and a plurality of hot plates arranged in the direction of feed, and, more particularly, to devices adapted to apply uniform pressure on said board by way of the compressed air blown into a plurality of air chambers with their bottoms open as disposed on the upper side, as opposed to the contact side with respect to the board being fed, of the conveyor belt so that a closer contact may be attained between said hot plates and the corrugated board being so fabricated.
As will be hereinafter described in detail, the conventional device designed for stated purpose merely comprises a plurality of presser rolls arranged on the back surface of the conveyer belt so as to press the board being fed under uniform pressure.
A major drawback of such an arrangement is instantly clear. It will be obvious that the spacing between any two adjacent rolls is not conducive but rather detrimental to the uniform distribution of pressure to act upon the board through the thickness of the conveyor belt.
This invention has as one of its objects to eifect uniform and increased drying of the corrugated board which has been fabricated and bonded together but has not yet been sufiiciently dried. Other objects and advantages of this invention will become apparent as the following description proceeds.
This invention will be hereinafter described in detail, reference being had to the accompanying drawings, in which:
FIG. 1 represents a front view, in section, of an embodiment of this invention for pressing and heating corrugated boards (first example of application);
FIG. 2 is a plan view of the same device of this invention;
FIG. 3 is a side elevation of the above-mentioned device of this invention;
FIG. 4 represents a front elevation of another embodiment of the invention for pressing and heating corrugated boards (second example of application);
FIG. 5 is a front sectional view, on exaggerated scale, of the air passageway therefor;
FIG. 6 is a side elevation, on exaggerated scale, of said air passageway; and
FIG. 7 is a cross-sectional plan View of the butting section of heating plates.
Now, this invention will be described in detail with reference to two preferred embodying examples. In the first example, which is illustrated in FIGS. 1-3, freshly glued, double faced, corrugated board 81 is paid out of a conventional manufacturing means designated in FIG- URE 6 as the board supply and the glue means. The board contacts the belt 64 advancing around 'belt roll 62 and is guided into the space defined by and between heating plates 63 and the conveyor belt 64.
From this point the board goes through a heating and drying process.
A remarkable feature of this invention lies in its numerous air chambers 75 that are arranged lengthwise on the upper side of a conveyor belt 64 running in contact with the heating plates 63. These air chambers are open at their bottoms, each being so adapted that the comice pressed air that has been sent out of a blower 76 is forced into these air chambers and applies direct pressure to the upper surface of the belt.
There is, however, some clearance between the lower edges of the air chambers 77 and the upper surface of the belt, allowing small portions of the air to leak out.
But as the blower 76 constantly supplies a sufiicient volume of compressed air, its pressure operates on the upper surface of the belt and, accordingly, on the double faced corrugated board lying immediately below the same, thus forcing said corrugated board into intimate contact with the heating plates 63. Indicated with numeral 78 is an elastic material which, by virtue of its elasticity, is always kept in touch with the upper surface of the belt and substantially prevents leakage of the air.
In the second example of this invention, which is illusstrated in FIGS. 4-6, a double faced corrugated board emerges out of a gluing device as in FIGURE 1.
The freshly glued board is then guided into the space defined by and between heating plates 63 and conveyor belt 64, wherein it goes through a heating and drying process as has already been explained hereinbefore. Similarly, it has also been explained with respect to the first example of this invention that a plurality of air chambers with their bottoms open are arranged end-to-end on the conveyer belt 64. The compressed air forced into said air chambers acts directly on the upper surface of the conveyer belt, thereby forcing the underlying corrugated board against the heating plates 63.
It should be understood, however, that according to the second embodiment of this invention, an air blower '79 is rigidly secured to the lower side of the frame 65 and the compressed air that is sent out of said air blower 79 is led through a pipe 80 in the direction of arrow 1'.
In this manner, the compressed air plays a triple role of acting directly on the entire upper surface of the conveyer belt 64, of applying uniform pressure to the underlying double faced corrugated board 81 through the thickness of the conveyer belt, and of heating and drying the double faced corrugated board from both sides, that is, from the heating plates 63 and from the air chambers.
Thus, in this second embodiment, the conveyer belt is made of a porous material, e.g. thick fabric, through the texture of which some of the compressed air flows to the upper surface of the double faced corrugated board, to be finally discharged through the spaces 82 at both edges of the corrugated board in the direction k. The air that is discharged into said spaces 82 flows into passageways 83, whence it further flows to vertical passageways 84, and, then, to a main duct 85.
The air is heated while it flows through the passageways 83 and 84 and the resulting hot air returns to the abovementioned air blower 79 by way of a pipe 86 through a control valve 87. In this way the compressed air that is supplied by the blower is continuously heated during circulation. The control valve 87 helps adjust the volume of the air, while the elastic material 83 secured rigidly to the lower edges of each air chamber serves to minimize the leakage of the air.
Thus, in the second embodiment of this invention, the compressed air that is supplied to the air chambers is forced through the fine meshes of the conveyer belt, and while circulating in the described manner, the air not only applies uniform pressure to the upper surface of the conveyer belt but also effectively heats the double faced corrugated board from the upper side thereof.
It will be apparent from the foregoing description that this invention provides an economically feasible means of manufacturing an improved type of corrugated board.
It should be understood, of course, that the foregoing disclosure relates to only preferred embodiments of the invention and that it is intended to cover all changes and modifications of the examples of the invention herein chosen for the purposes of the disclosure, which do not constitute departures from the spirit and scope of the invention set forth in the appended claims.
We claim as our invention:
1. In a double faced corrugated board manufacturing equipment comprising a plurality of hot plates and an endless conveyer belt, in which a double faced corrugated board is fed through the space defined by said hot plates and said conveyer belt so as to heat and dry the board, the arrangement of devices adapted to press and heat the corrugated board, said devices comprising a plurality of fluid chambers having open bottoms and disposed on the conveyer belt in the direction of feed, a blower, and a fluid forced by said blower into said chambers, whereby a constant pressure is exerted uniformly onto the entire upper surface of the corrugated board through the thickness of the conveyer belt.
2. An arrangement as claimed in claim 1, wherein the fluid is air.
3. An arrangement as claimed in claim 1, wherein the endless conveyer belt is made of a porous material.
4. An arrangement as claimed in claim 3, further comprising spaces along the edges of the board, a plurality of horizontal channels extending laterally along the joints of each two adjoining hot plates, a plurality of vertical channels communicating with said horizontal channels, and a main fluid duct communicating with said vertical channels and discharging into the blower, the compressed air from the fluid chambers being forced through said porous belt to emerge onto the corrugated board, along the surface of which it returns to the blower through the spaces along the edges of the board, said horizontal channels, vertical channels, and main fluid duct in such a manner that the air is heated by the hot plates as it passes through said channels, so that the corrugated board is effectively heated and dried not only from the bottom side thereof but also the upper side thereof.
5. An arrangement as described in claim 4, wherein elastic elements are provided along the lower edges of the fluid chambers to prevent leakage of the hot air for improved circulation.
References Cited by the Examiner UNITED STATES PATENTS 3/1941 Grimm 34155 X 2/1942 Poor et a1 34-16()

Claims (1)

1. IN A DOUBLE FACED CORRUGATED BOARD MANUFACTURING EQUIPMENT COMPRISING A PLURALITY OF HOT PLATES AND AN ENDLESS CONVEYOR BELT, IN WHICH A DOUBLE FACED CORRUGATED BOARD IS FED THROUGH THE SPACED DEFINED BY SAID HOT PLATES AND SAID CONVEYOR BELT SO AS TO HEAT AND DRY THE BOARD, THE ARRANGEMENT OF DEVICES ADAPTED TO PRESS AND HEAT THE CORRUGATED BOARD, SAID DEVICES COMPRISING A PLURALITY OF FLUID CHAMBERS HAVING OPEN BOTTOMS AND DISPOSED ON THE CONVEYOR BELT IN THE DIRECTION OF FEED, A BLOWER, AND A FLUID FORCED BY SAID BLOWER INTO SAID CHAMBERS, WHEREBY A CONSTANT PRESSURE IS EXERTED UNIFORMLY ONTO THE ENTIRE UPPER SURFACE OF THE CORRUGATED BOARD THROUGH THE THICKNESS OF THE CONVEYOER BELT.
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Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3861057A (en) * 1972-04-13 1975-01-21 Peters Maschf Werner H K Heating apparatus for material in strip form
DE2930883A1 (en) * 1979-07-30 1981-02-05 Siemens Ag Capacitive HF gluing device for corrugated paper mfr. - uses different air pressure either side of web to provide contact pressure between web layers
US4419173A (en) * 1980-07-22 1983-12-06 K-Three Products Kabushiki Kaisha Method of producing corrugated cardboards and apparatus
EP0135052A2 (en) * 1983-08-19 1985-03-27 Werner H. K. Peters Maschinenfabrik GmbH Heating device for corrugated board in a machine for uniting the corrugated board with a web
US4625433A (en) * 1985-04-18 1986-12-02 Owens-Corning Fiberglas Corporation Fibrous pack drying method and apparatus
US4674976A (en) * 1984-01-26 1987-06-23 Japan Styrene Paper Corporation Method for the preparation of a foamed article of a polyolefin resin
EP0281814A1 (en) * 1987-03-02 1988-09-14 Mitsubishi Jukogyo Kabushiki Kaisha Double facer
US5154010A (en) * 1989-11-06 1992-10-13 Gerhard Klemm Maschinenfabrik Gmbh & Co. Sheet drying apparatus
US5181330A (en) * 1990-11-14 1993-01-26 Bobst Sa Device for assembling superposed, glued web-like layers
EP0559181A1 (en) * 1992-03-06 1993-09-08 Fabrizio Massenzana Process and machine for coupling component elements of a multi-layered corrugated board
US5303484A (en) * 1992-04-09 1994-04-19 Thermo Electron Web Systems, Inc. Compact convective web dryer
EP0623459A2 (en) * 1993-05-06 1994-11-09 Interfic Developments Incorporated Apparatus and method for enhancing heating uniformity for setting adhesive in corrugated paperboard manufacturing
US5466329A (en) * 1994-06-03 1995-11-14 Marquip, Inc. Adjustable ballast system for the holddown belt in a double facer
US5526739A (en) * 1993-09-22 1996-06-18 Corrugated Gear & Services Inc. Apparatus for applying variable pressure to a surface
US5561918A (en) * 1995-06-26 1996-10-08 Marquip, Inc. Web holdown and drive for corrugator double backer
US5611267A (en) * 1993-09-22 1997-03-18 Corrugated Gear & Services, Inc. Apparatus and method for applying variable pressure to a surface in corrugated paperboard manufacturing
FR2739319A1 (en) * 1995-09-28 1997-04-04 Bhs Corr Masch & Anlagenbau MACHINE FOR MANUFACTURING A CURVED CARTON STRIP, DOUBLED AT LEAST ON ONE SIDE
US5632830A (en) * 1994-06-03 1997-05-27 Marquip, Inc. Adjustable ballast system for a double facer
US5732622A (en) * 1997-01-24 1998-03-31 Corrugated Gear And Services Machine for manugacturing corrugated board
US5746010A (en) * 1995-06-26 1998-05-05 Marquip, Inc. Web holddown and drive for corrugator double backer
US5788803A (en) * 1996-10-16 1998-08-04 Interfic, Inc. Corrugated paperboard manufacturing apparatus with controllable preheating
US5837974A (en) * 1996-10-16 1998-11-17 Interfic, Inc. Corrugated paperboard manufacturing apparatus with board profile monitoring and related methods
US5847362A (en) * 1996-10-16 1998-12-08 Interfic, Inc. Corrugated paperboard manufacturing apparatus providing controllable heat and related methods
US5890301A (en) * 1997-11-11 1999-04-06 Marquip, Inc. Thread-up apparatus for a corrugator double backer
US5902502A (en) * 1996-10-16 1999-05-11 Interfic, Inc. Corrugated paperboard manufacturing apparatus and related methods
US5926973A (en) * 1998-03-05 1999-07-27 Marquip, Inc Vacuum assisted beltless holddown for double backer
US5948197A (en) * 1998-03-04 1999-09-07 Marquip, Inc. Air pressure assisted beltless holddown for double backer
US6050316A (en) * 1997-04-18 2000-04-18 United Container Machinery, Inc. Single facer preheater
US6110095A (en) * 1997-04-18 2000-08-29 United Container Machinery Inc. Apparatus for heating corrugated paperboard
US20020188079A1 (en) * 2000-08-22 2002-12-12 China Petroleum & Chemical Corporation Toughened plastics and preparation thereof
US10184897B2 (en) 2014-04-04 2019-01-22 Packaging Corporation Of America System and method for determining an impact of manufacturing processes on the caliper of a sheet material

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2236056A (en) * 1938-02-04 1941-03-25 Pratt Co Henry Apparatus and method of making corrugated board
US2272383A (en) * 1939-06-15 1942-02-10 Nathan H Poor Company Drying apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2236056A (en) * 1938-02-04 1941-03-25 Pratt Co Henry Apparatus and method of making corrugated board
US2272383A (en) * 1939-06-15 1942-02-10 Nathan H Poor Company Drying apparatus

Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3861057A (en) * 1972-04-13 1975-01-21 Peters Maschf Werner H K Heating apparatus for material in strip form
DE2930883A1 (en) * 1979-07-30 1981-02-05 Siemens Ag Capacitive HF gluing device for corrugated paper mfr. - uses different air pressure either side of web to provide contact pressure between web layers
US4419173A (en) * 1980-07-22 1983-12-06 K-Three Products Kabushiki Kaisha Method of producing corrugated cardboards and apparatus
EP0135052A2 (en) * 1983-08-19 1985-03-27 Werner H. K. Peters Maschinenfabrik GmbH Heating device for corrugated board in a machine for uniting the corrugated board with a web
EP0135052A3 (en) * 1983-08-19 1986-03-05 Werner H. K. Peters Maschinenfabrik Gmbh Heating device for corrugated board in a machine for uniting the corrugated board with a web
US4674976A (en) * 1984-01-26 1987-06-23 Japan Styrene Paper Corporation Method for the preparation of a foamed article of a polyolefin resin
US4625433A (en) * 1985-04-18 1986-12-02 Owens-Corning Fiberglas Corporation Fibrous pack drying method and apparatus
EP0281814A1 (en) * 1987-03-02 1988-09-14 Mitsubishi Jukogyo Kabushiki Kaisha Double facer
US4889580A (en) * 1987-03-02 1989-12-26 Mitsubishi Jukogyo Kabushiki Kaisha Double facer
US5154010A (en) * 1989-11-06 1992-10-13 Gerhard Klemm Maschinenfabrik Gmbh & Co. Sheet drying apparatus
US5181330A (en) * 1990-11-14 1993-01-26 Bobst Sa Device for assembling superposed, glued web-like layers
EP0559181A1 (en) * 1992-03-06 1993-09-08 Fabrizio Massenzana Process and machine for coupling component elements of a multi-layered corrugated board
US5303484A (en) * 1992-04-09 1994-04-19 Thermo Electron Web Systems, Inc. Compact convective web dryer
EP0623459A2 (en) * 1993-05-06 1994-11-09 Interfic Developments Incorporated Apparatus and method for enhancing heating uniformity for setting adhesive in corrugated paperboard manufacturing
EP0623459A3 (en) * 1993-05-06 1995-04-19 Interfic Dev Inc Apparatus and method for enhancing heating uniformity for setting adhesive in corrugated paperboard manufacturing.
US5456783A (en) * 1993-05-06 1995-10-10 Interfic Developments Incorporated Apparatus and method for enhancing heating uniformity for setting adhesive in corrugated paperboard manufacturing
US5526739A (en) * 1993-09-22 1996-06-18 Corrugated Gear & Services Inc. Apparatus for applying variable pressure to a surface
US5711214A (en) * 1993-09-22 1998-01-27 Lauderbaugh; David M. Apparatus for dissipating moisture from an item
US5611267A (en) * 1993-09-22 1997-03-18 Corrugated Gear & Services, Inc. Apparatus and method for applying variable pressure to a surface in corrugated paperboard manufacturing
US5791239A (en) * 1993-09-22 1998-08-11 Corrugated Gear & Services, Inc. Machine for manufacturing corrugated paperboard with independently controlled pressure applicators
US5466329A (en) * 1994-06-03 1995-11-14 Marquip, Inc. Adjustable ballast system for the holddown belt in a double facer
US5632830A (en) * 1994-06-03 1997-05-27 Marquip, Inc. Adjustable ballast system for a double facer
US5853527A (en) * 1995-06-26 1998-12-29 Marquip, Inc. Stationary holddown mat for corrugator double backer
US5746010A (en) * 1995-06-26 1998-05-05 Marquip, Inc. Web holddown and drive for corrugator double backer
US5832628A (en) * 1995-06-26 1998-11-10 Marquip, Inc. Web holddown with thread-up mechanism
US5561918A (en) * 1995-06-26 1996-10-08 Marquip, Inc. Web holdown and drive for corrugator double backer
FR2739319A1 (en) * 1995-09-28 1997-04-04 Bhs Corr Masch & Anlagenbau MACHINE FOR MANUFACTURING A CURVED CARTON STRIP, DOUBLED AT LEAST ON ONE SIDE
US5902502A (en) * 1996-10-16 1999-05-11 Interfic, Inc. Corrugated paperboard manufacturing apparatus and related methods
US5788803A (en) * 1996-10-16 1998-08-04 Interfic, Inc. Corrugated paperboard manufacturing apparatus with controllable preheating
US5837974A (en) * 1996-10-16 1998-11-17 Interfic, Inc. Corrugated paperboard manufacturing apparatus with board profile monitoring and related methods
US5847362A (en) * 1996-10-16 1998-12-08 Interfic, Inc. Corrugated paperboard manufacturing apparatus providing controllable heat and related methods
US5732622A (en) * 1997-01-24 1998-03-31 Corrugated Gear And Services Machine for manugacturing corrugated board
US6050316A (en) * 1997-04-18 2000-04-18 United Container Machinery, Inc. Single facer preheater
US6110095A (en) * 1997-04-18 2000-08-29 United Container Machinery Inc. Apparatus for heating corrugated paperboard
US5890301A (en) * 1997-11-11 1999-04-06 Marquip, Inc. Thread-up apparatus for a corrugator double backer
US5948197A (en) * 1998-03-04 1999-09-07 Marquip, Inc. Air pressure assisted beltless holddown for double backer
US5926973A (en) * 1998-03-05 1999-07-27 Marquip, Inc Vacuum assisted beltless holddown for double backer
US20020188079A1 (en) * 2000-08-22 2002-12-12 China Petroleum & Chemical Corporation Toughened plastics and preparation thereof
EP1314752A1 (en) * 2000-08-22 2003-05-28 China Petroleum & Chemical Corporation Tenacity plastic and its preparation method
EP1314752A4 (en) * 2000-08-22 2004-08-18 China Petroleum & Chemical Tenacity plastic and its preparation method
US6998438B2 (en) 2000-08-22 2006-02-14 China Petroleum & Chemical Corporation Toughened plastics and preparation thereof
US10184897B2 (en) 2014-04-04 2019-01-22 Packaging Corporation Of America System and method for determining an impact of manufacturing processes on the caliper of a sheet material

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