US3875682A - Sheet stabilizer for dryer - Google Patents

Sheet stabilizer for dryer Download PDF

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Publication number
US3875682A
US3875682A US341963A US34196373A US3875682A US 3875682 A US3875682 A US 3875682A US 341963 A US341963 A US 341963A US 34196373 A US34196373 A US 34196373A US 3875682 A US3875682 A US 3875682A
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US
United States
Prior art keywords
web
edge
dryer
drums
rolls
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
US341963A
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English (en)
Inventor
Edgar J Justus
Elmer E Crist
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.)
Beloit Corp
Original Assignee
Beloit Corp
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
Application filed by Beloit Corp filed Critical Beloit Corp
Priority to US341963A priority Critical patent/US3875682A/en
Priority to JP49023473A priority patent/JPS52129B2/ja
Priority to CA194,642A priority patent/CA1016741A/en
Application granted granted Critical
Publication of US3875682A publication Critical patent/US3875682A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders

Definitions

  • ABSTRACT 7 [52] U.S. Cl. 34/118, 34/l20, 2-6/195 A dryer for evaporating mositure from a traveling [5 [1 Int. Cl. F26b 11/02 [58] Field of Search 34/1 104 paper web havmg dryer drums arranged in upper and "f lower tiers with the web traveling in a serpentine path 226/195 242/752 26/63 68 up and down over the drums and edge rolls positioned [56 ⁇ Reterences Cited at each edge of the web agalns t the uprunning span thereof dr1ven at a speed approxlmately 75 per cent of UNITED STATES PATENTS the speed of web travel and slightly deflecting the l.0l7 349 2/19l2 Tracy 34/118 web, preventing flutter of the edges at the higher web 1.170.309 2/1916 Meyers 34/[18 speeds.
  • the present invention relates to improvements in dryers and more particularly to dryers of the type used in a paper making machine having a series of rotating dryer drums over which the web is wrapped for heating the web and evaporating moisture therefrom.
  • the fluttering which occurs at the web edge can occur at different locations along the dryer, but will occur at any place in the web span as it travels from one drum to the other.
  • the drums are arranged in tiers with the web traveling in an S shaped serpentine path between the upper and lower tiers of the dryer.
  • the fluttering can be progressive across the sheet generally starting at the edge and is particularly disadvantageous in causing stretching of the sheet particularly if it occurs at a number of locations and a number of spans between dryer drums.
  • the moisture content decreases so that the actual weight of the web changes and fluttering can occur at various positions. Efforts to reduce this flutter have met with varying degrees of success, but have not been wholly capable of providing a simple effective means of eliminating the flutter particularly at high speeds.
  • a still further object of the invention is to provide an improved mechanism for eliminating flutter in a paper machine dryer section between dryer drums and accomplishing the elimination of the flutter by a simple construction which does not require substantial space and can be readily installed in existing dryers.
  • FIG. I is a front elevational view of a paper dryer constructed and operating in accordance with the principles of the present invention.
  • FIG. 2 is a fragmentary vertical sectional view taken substantially along line IIII of FIG. 1.
  • a dryer section of a paper making machine is supported on front and back frames with the front frame shown as having vertical posts 10 and II with a laterally extending beam 12 therebetween
  • the framework at the back of the machine will be somewhat similarly constructed and need not be shown in detail. Extending between the front and back frames of the machine will be a plurality of sequentially arranged dryer drums.
  • the drawings show first, second and third drums I3, 14 and 15.
  • the drums will be usually arranged in tiers with the drum 14 being in the upper tier and the drums l3 and 15 being in the lower tier.
  • the upper tier of drums will be at the same horizontal elevation, and the lower tier of drums will be at the same horizontal elevation with the number of drums provided being sufficient to heat the web and evaporate the moisture therefrom which is left in the web after passing through the press section of the machine.
  • Such machines will conventionally have or more drums.
  • the drums will be heated usually by steam to be at a controlled temperature which is kept uniform throughout the length of the drum.
  • the length of the drum will vary in accordance with the designed width of the paper making machine and conventionally will be approximately 24 feet to 36 feet long.
  • the web W is wrapped in serpentine fashion over the drums so as to travel in a generally S shaped path. As illustrated, the web is first wrapped over the lower drum 13 and then passes up in an upwardly extending run W-U and is wrapped over the upper drum l4 and then extends in a downward run W-D.
  • edge rolls Positioned at the edges of the web W in the upwardly extending run W-U are guide means in the form of edge rolls positioned at each edge of the web. Because the rolls are of similar construction, only the roll 16 at the front edge of the machine need be shown and described in detail.
  • the edge rolls are of limited length and do not extend completely across the machine, but extend only a short distance inwardly to contact the edge ofthe web and to deflect it a short distance D from its normal path of travel.
  • the edge rolls can be positioned on either side of the web, but preferably on the same side as the lower roll which the web has just left.
  • the roll is driven in rotation in a direction the same as the web travel, and it has been found that by driving the roll at a speed slower than the web travel, the tendency of the edge roll to eliminate flutter is enhanced.
  • a rotational speed of preferably 75 per cent of the speed of web travel is used and variations from 50 to I per cent of the speed of web travel also may be employed.
  • a sliding guide may also be employed. but substantial improvement is achieved by using a rotating roll.
  • the edge rolls are supported on brackets such as shown by the bracket 17 mounted by a plate 18 to the beam l2.
  • the plate is so constructed so as to permit lateral adjustment of the position of the edge roll and this may be accomplished by elongate slots in the plate, so that it may be adjusted by loosening tightening nuts. not shown, and shifting the plate to obtain a desired web deflection D.
  • the deflection D for each edge of the web is chosen to be the same.
  • the roll I6 may be driven by separate motors, or may be driven by sheaves carrying belts which pass over similar edge rolls.
  • the roll in FIG. 2 is shown equipped to be driven by a sheave 23 or by a motor 24. If the roll is to be usually driven by a sheave, the motor 24 may be re placed by a supporting bearing. Conversely, if a motor drive is usually to be used, the sheave 23 may be omitted.
  • the roll I6 comprises a tubular roll shell 16a with radial bearing plates 16d and lfie rotatably mounted on a trunnion 21.
  • the trunnion 21 is driven in rotation by the motor 24 or by the sheave 23 which is locked to the trunnion 2
  • the roll is held on the trunnion shaft by a nut 22 threaded on the end holding the plate l3e in place.
  • a curved shaped cone end shell 16b which is held by a screw 166 to the roll shell 16a.
  • the roll shell 16a and the end shell 16b are polished for smooth nonabrasive contact with the web.
  • a coating of teflon may be contained on the outer surface of the roll and end cone.
  • the length of the end roll is short relative to the width of the paper web, and a roll length of 6 inches to 4 feet may be employed.
  • the diameter of the roll is small relative to the dryer drums, and a diameter of 3 inches to 2 feet is satisfactory.
  • the roll may be vertically adjustable by the bracket 19 being vertically adjustable in its support I7.
  • a motor drive is used, a variable speed motor is employed to control the rotational speed of the roll to approximately 75 per cent of the web speed.
  • the main driving motor driving the belt will also be variably controlled in speed.
  • edge rolls may be employed in all of the open draws, it has been found that by using them only in the uprunning draws, edge flutter is avoided.
  • the rolls are simple in construction and easily manufactured and may be used on existing paper equipment as speeds of operation are increased.
  • a dryer for evaporating moisture from a traveling fibrous web comprising:
  • a plurality of heated dryer drums positioned in the upper and lower tiers for having a traveling web sequentially passed between the upper and lower tiers to wrap the drums for heating the web and evaporating moisture therefrom;
  • edge rolls each having an axis parallel to the drums and parallel to the web and at right angles to the direction of web travel, said rolls positioned between the upper and lower tiers at each edge of the web extending only a short distance inwardly from the web edge defiectingly supporting the web edge to reduce the tendency of the sheet to flutter at high er web travel speeds;
  • edge rolls are driven at a surface speed lower than the speed of travel of the web.
  • drums are positioned with a second drum at a higher elevation than the first drum and the edge rolls are located in the span between the first and second drum and wherein a third drum is located at a lower elevation than the second drum and the web span between the second and third drum is free from contact with any edge rolls.
  • edge rolls have a generally rounded nose end inwardly from the edge of the web.
  • edge rolls have a diameter in the range of 3 inches to 2 feet.
  • a plurality of parallel heated drums positioned so that a web sequentially wraps the drums to be heated and to evaporate moisture therefrom; and guide means at each edge of the web in the web span between drums engaging the web at the edge and extending inwardly only a short distance from the web edge preventing web flutter at higher web speeds, said guide means being in the form of a roll at each edge of the web and the roll being driven at a speed ranging from 50 per cent to per cent of the web speed.
  • said guide means being in the form of rolls at each edge of the web and the rolls being driven at a speed substantially per cent of the speed of web travel.

Landscapes

  • Drying Of Solid Materials (AREA)
  • Paper (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
US341963A 1973-03-16 1973-03-16 Sheet stabilizer for dryer Expired - Lifetime US3875682A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US341963A US3875682A (en) 1973-03-16 1973-03-16 Sheet stabilizer for dryer
JP49023473A JPS52129B2 (ja) 1973-03-16 1974-03-01
CA194,642A CA1016741A (en) 1973-03-16 1974-03-11 Inter-drum rolls to prevent web edge flutter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US341963A US3875682A (en) 1973-03-16 1973-03-16 Sheet stabilizer for dryer

Publications (1)

Publication Number Publication Date
US3875682A true US3875682A (en) 1975-04-08

Family

ID=23339753

Family Applications (1)

Application Number Title Priority Date Filing Date
US341963A Expired - Lifetime US3875682A (en) 1973-03-16 1973-03-16 Sheet stabilizer for dryer

Country Status (3)

Country Link
US (1) US3875682A (ja)
JP (1) JPS52129B2 (ja)
CA (1) CA1016741A (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996003337A1 (en) * 1994-07-27 1996-02-08 Double E Company, Inc. Web control
US5882481A (en) * 1995-12-01 1999-03-16 Voith Sulzer Papiermaschinen Gmbh Blocking device in a paper-making machine
US20040177780A1 (en) * 2003-03-14 2004-09-16 Vroome Clemens Johannes Maria De Printing material web processing machine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1017349A (en) * 1911-06-28 1912-02-13 William H H Tracy ?ing and ironing machine.
US1170309A (en) * 1915-06-04 1916-02-01 Michael H Meyers Drier sheet-steel for paper-machines.
US2067755A (en) * 1933-07-26 1937-01-12 Hammermill Paper Co Tension controlling means
US2348162A (en) * 1941-08-25 1944-05-02 Champion Paper & Fibre Co Web spreader
US3411684A (en) * 1965-07-12 1968-11-19 Seailles & Tison Sa Paying out under tension of products in sheet form,particularly paper sheet
US3509607A (en) * 1966-11-03 1970-05-05 Vepa Ag Apparatus for the crease-free heat-treatment of lengths of textile materials

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1017349A (en) * 1911-06-28 1912-02-13 William H H Tracy ?ing and ironing machine.
US1170309A (en) * 1915-06-04 1916-02-01 Michael H Meyers Drier sheet-steel for paper-machines.
US2067755A (en) * 1933-07-26 1937-01-12 Hammermill Paper Co Tension controlling means
US2348162A (en) * 1941-08-25 1944-05-02 Champion Paper & Fibre Co Web spreader
US3411684A (en) * 1965-07-12 1968-11-19 Seailles & Tison Sa Paying out under tension of products in sheet form,particularly paper sheet
US3509607A (en) * 1966-11-03 1970-05-05 Vepa Ag Apparatus for the crease-free heat-treatment of lengths of textile materials

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996003337A1 (en) * 1994-07-27 1996-02-08 Double E Company, Inc. Web control
US5797532A (en) * 1994-07-27 1998-08-25 Double E Company, Inc. Web edge control system
US5882481A (en) * 1995-12-01 1999-03-16 Voith Sulzer Papiermaschinen Gmbh Blocking device in a paper-making machine
US20040177780A1 (en) * 2003-03-14 2004-09-16 Vroome Clemens Johannes Maria De Printing material web processing machine
US8887636B2 (en) * 2003-03-14 2014-11-18 Goss Contiweb B.V. Printing material web processing machine

Also Published As

Publication number Publication date
JPS49134907A (ja) 1974-12-25
JPS52129B2 (ja) 1977-01-05
CA1016741A (en) 1977-09-06

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