US3127079A - Method for threading the leading end of a weblike material - Google Patents

Method for threading the leading end of a weblike material Download PDF

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US3127079A
US3127079A US3127079DA US3127079A US 3127079 A US3127079 A US 3127079A US 3127079D A US3127079D A US 3127079DA US 3127079 A US3127079 A US 3127079A
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web
guide rail
leading end
threading
rolls
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/04—Paper-break control devices

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  • FIG. 1 A first figure.
  • the present invention relates to a novel method for threading the leading end of a web and is characterized in that the leading end of the material web is maintained stretched in the direction of conveyance of the web and prevented from fluttering by being connected to a guiding member introduced into the machine prior to the feeding of the material web, said guiding member being preferably a thin, flexible, resilient strip, for example steel strip, inserted in a guide rail extending along the side of the entire conveyance path of the web and substantially enclosing said guiding member entirely, the said guide rail being provided with a narrow slot facing the web, and in that said guiding member is advanced by being pressed against the turning rolls or against separate support rolls which are driven during the threading operation by means of rollers provided in recesses in the guide rail.
  • a guiding member being preferably a thin, flexible, resilient strip, for example steel strip
  • the device according to the invention comprises a guiding member of the aforedescribed type with associated guide rail and coupling means for connecting the guiding member with the leading end of the material web, and is characterized in that said coupling means comprise a holder projecting through said guide rail slot and adapted to be hooked in the rear end portion of said guiding member, said holder being connected by a wire with a V-shaped folded gripping band, the legs of which are maintained pressed against one another by inserted spring means, and in that the guiding member as well as the coupling means prior to the threading are kept in a ready-for-operation position in front of the drying plant, a guide means for said gripping band being di- "ice rected obliquely towards the edge of the material web and provided with a V-shaped bar for parting the legs of the gripping band when the gripping band is being introduced and maintaining the legs in parted position until-after having passed said barthe legs are released and grip the edge of the material web.
  • both ends comprise a holder projecting through said
  • FIG. 1 is a plan view of apparatus embodying the invention
  • FIG. 2 is a vertical longitudinal section through the apparatus shown in FIG. 1;
  • FIG. 3 is an enlarged partial section of parts shown near the top of FIG. 2;
  • FIG. 4 is a top plan view of parts shown in FIG. 3;
  • FIG, 5 is an enlarged section taken on the line 5-5 of FIG. 3;
  • FIG. 6 is an enlarged section taken on the line 6-6 of FIG. 3;
  • FIG. 7 is a plan view of the flexible connecting strip
  • FIG. 8 is a side elevation of the strip shown in FIG. 7;
  • FIG. 9 is an exploded perspective view showing the coupling construction.
  • FIG. 1 designates a drying plant or the like for weblike material 2 which is to be advanced through said plant in a plurality of horizontal windings between turning rolls 3 located at both ends.
  • a guiding member is used for guiding the leading end 2a of the web 2 through said plant, which guiding member consists of a thin, flexible, resilient strip 4.
  • the strip is introduced into a guide rail 5 extending along the side of the entire conveyance path of the web and substantially enclosing said guiding member 4 entirely.
  • Said guide rail 5 is provided with a narrow slot 5a facing the web.
  • Rollers for feeding the guiding member are designated 6, said rollers being arranged in recesses 7 in the guide rail 5 and pressing the guiding member 4 against the turning rolls 3 or against separate support rolls 8 which are driven during the threading operation.
  • 9 designates springs mounted on the rollers 6.
  • the guiding member is folded at both ends 4a and 412 respectively and provided with a recess 1% for hooking therein a holder 11 projecting through the said guide rail slot 5a.
  • the said holder 11 is connected with a V-shaped gripping band 13 via a wire 12.
  • Such an edge-gripping band is disclosed in the copending application of Allander et al., S.N. 836,221, filed August 26, 1959, now Patent No. 3,085,346.
  • the legs of said gripping band are in known manner maintained pressed against one another by inherent resilience or by inserted spring means.
  • Said guiding member 4 and the coupling means are, prior to the threading of the leading end, arranged in a ready for operation position in front of the plant in an arrangement (not shown).
  • Said arrangement should comprise means for parting the legs of the gripping band when the gripping band is being introduced and maintaining said legs in parted position untilafter having passed said parting means-they are released and grip the edge of the material web, all as disclosed in said copending application.
  • 14, 15 and 16 designate driving means for the turning rolls 3 and support rolls 8.
  • the profile and dimensions of the guiding member 4 and guide rail 5 may be varied within the scope of the invention according to specific requirements.
  • Apparatus for threading the leading end of a web through drying apparatus having a plurality of web supporting rolls at the ends of web-drying passages comprising in combination, a continuous tubular guide rail arranged at at least one end of said rolls and following the web path between and around said rolls, said tubular guide rail having a continuous slot on the side toward the web path, a flexible resilient leader strip movable along the tubular space of said guide rail, connecting means between said leader strip and an edge of said web, including means extending through the slot of said rail, and power drive means engaging said leader strip to feed it through the tubular guide rail.
  • said connecting means includes a member having a hook connection with said leader strip which is movable through said tubular rail and having a lateral portion extending through said slot and connected to an edge of said web.
  • said power drive means includes roll means at the ends of said web supporting rolls engaging the leader strip on both sides to grip and drive it.
  • said roll means includes driven supporting rolls and resiliently biased pressure rolls engaging the leader strip.

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  • Drying Of Solid Materials (AREA)

Description

3,127,079 MATERIAL March 31, 1964 c. ALLANDER METHOD FOR THREADING THE LEADING END OF A WEBLIKE AND A DEVICE FOR CARRYING OUT THE METHOD 1962 3 Sheets-Sheet 1 Filed Feb. 6,
FIG. I.
INVENTOR! CLAES ALLANDER ATTYS.
March 31, 1964 c, ALLANDER 3,127,079
METHOD FOR THREADING THE LEADING END OF A WEBLIKE MATERIAL AND A DEVICE FOR CARRYING OUT THE METHOD Filed Feb. 6, 1962 3 Sheets-Sheet 2 mvsmon: CLAES ALLANDER AT TYS.
FIG4.
FIGB
3 Sheets-Sheet 3 INVENTOR. CLAES ALLANDER WWW ATTYS.
METHOD FOR THREADING THE LEADING END OF A WEBLIKE MATERIAL AND A DEVICE FOR CARRYING OUT THE METHOD Filed Feb. 6, 1962 F IG. 6.
FIGS
United States Patent 3,127,079 METHOD FOR THREADING THE LEADING END OF A WEBLIKE MATERIAL AND A DEVICE FOR QARRYING GUT THE METHQD (Ilaes Allander, Bromma, Sweden, assignor to Aktieholaget Svenska Flaktfahriken, Stockholm, Sweden Filed Feb. 6, 1962, Ser. No. 171,794 Claims priority, application Sweden Feb. 8, 1961 Claims. (Cl. Hit-92) The present invention relates to a method and a device adapted for so called threading, i.e. guiding and advancing the leading end of a weblike, preferably wet material with low mechanical strength, which material is to be advanced in one or more passages through a drying plant between turning rolls mounted at the ends of said passages. When treating a weblike material in apparatus of the aforesaid type, it has always proved difiicult to guide and advance the leading end of the web material. It was heretofore common practice to transfer the leading end of the web at the turning points of the web to the different conveying elements of the various passages by hand. This method-besides being time wastingis particularly troublesome when applied to wet material of low mechanical strength, for example cellulose pulp. The reduction in speed necessitated by the said manual threading requires, moreover, in the treatment of cellulose pulp the application of a certain complicated adjusting work with the preceding wet section. The aforesaid difficulties arising in connection with the threading of the leading end have increased still more since the introduction of more modern plants. In View of the fact that such modern plants operate without mechanical conveyors, the web being advanced entirely air-borne, it is necessary to guide the leading end of the Web in a mechanical manner continuously along all its way of conveyance and not, as before, only at the turning points. For reasons of space, the runs of the web have to be spaced relative one another in such a manner that a manual mechanical control of the leading end between the turning points is rendered impossible.
The present invention relates to a novel method for threading the leading end of a web and is characterized in that the leading end of the material web is maintained stretched in the direction of conveyance of the web and prevented from fluttering by being connected to a guiding member introduced into the machine prior to the feeding of the material web, said guiding member being preferably a thin, flexible, resilient strip, for example steel strip, inserted in a guide rail extending along the side of the entire conveyance path of the web and substantially enclosing said guiding member entirely, the said guide rail being provided with a narrow slot facing the web, and in that said guiding member is advanced by being pressed against the turning rolls or against separate support rolls which are driven during the threading operation by means of rollers provided in recesses in the guide rail.
The device according to the invention comprises a guiding member of the aforedescribed type with associated guide rail and coupling means for connecting the guiding member with the leading end of the material web, and is characterized in that said coupling means comprise a holder projecting through said guide rail slot and adapted to be hooked in the rear end portion of said guiding member, said holder being connected by a wire with a V-shaped folded gripping band, the legs of which are maintained pressed against one another by inserted spring means, and in that the guiding member as well as the coupling means prior to the threading are kept in a ready-for-operation position in front of the drying plant, a guide means for said gripping band being di- "ice rected obliquely towards the edge of the material web and provided with a V-shaped bar for parting the legs of the gripping band when the gripping band is being introduced and maintaining the legs in parted position until-after having passed said barthe legs are released and grip the edge of the material web. In a preferred embodiment of the device according to the invention both ends of the guiding member have a thickness exceeding the width of the guide rail slot and are so designed that the holder of the gripping band may be hooked in at both said ends.
The invention will now be described more in detail with reference to the accompanying drawings showing by Way of an example an embodiment of the device according to the invention.
FIG. 1 is a plan view of apparatus embodying the invention;
FIG. 2 is a vertical longitudinal section through the apparatus shown in FIG. 1;
FIG. 3 is an enlarged partial section of parts shown near the top of FIG. 2;
FIG. 4 is a top plan view of parts shown in FIG. 3;
FIG, 5 is an enlarged section taken on the line 5-5 of FIG. 3;
FIG. 6 is an enlarged section taken on the line 6-6 of FIG. 3;
FIG. 7 is a plan view of the flexible connecting strip;
FIG. 8 is a side elevation of the strip shown in FIG. 7; and
FIG. 9 is an exploded perspective view showing the coupling construction.
In the accompanying drawings 1 designates a drying plant or the like for weblike material 2 which is to be advanced through said plant in a plurality of horizontal windings between turning rolls 3 located at both ends. According to the invention, a guiding member is used for guiding the leading end 2a of the web 2 through said plant, which guiding member consists of a thin, flexible, resilient strip 4. The strip is introduced into a guide rail 5 extending along the side of the entire conveyance path of the web and substantially enclosing said guiding member 4 entirely. Said guide rail 5 is provided with a narrow slot 5a facing the web. Rollers for feeding the guiding member are designated 6, said rollers being arranged in recesses 7 in the guide rail 5 and pressing the guiding member 4 against the turning rolls 3 or against separate support rolls 8 which are driven during the threading operation. 9 designates springs mounted on the rollers 6. In the embodiment shown the guiding member is folded at both ends 4a and 412 respectively and provided with a recess 1% for hooking therein a holder 11 projecting through the said guide rail slot 5a. The said holder 11 is connected with a V-shaped gripping band 13 via a wire 12. Such an edge-gripping band is disclosed in the copending application of Allander et al., S.N. 836,221, filed August 26, 1959, now Patent No. 3,085,346. The legs of said gripping band are in known manner maintained pressed against one another by inherent resilience or by inserted spring means. Said guiding member 4 and the coupling means are, prior to the threading of the leading end, arranged in a ready for operation position in front of the plant in an arrangement (not shown). Said arrangement should comprise means for parting the legs of the gripping band when the gripping band is being introduced and maintaining said legs in parted position untilafter having passed said parting means-they are released and grip the edge of the material web, all as disclosed in said copending application. 14, 15 and 16 designate driving means for the turning rolls 3 and support rolls 8. The profile and dimensions of the guiding member 4 and guide rail 5 may be varied within the scope of the invention according to specific requirements.
What I claim is:
1. Apparatus for threading the leading end of a web through drying apparatus having a plurality of web supporting rolls at the ends of web-drying passages, comprising in combination, a continuous tubular guide rail arranged at at least one end of said rolls and following the web path between and around said rolls, said tubular guide rail having a continuous slot on the side toward the web path, a flexible resilient leader strip movable along the tubular space of said guide rail, connecting means between said leader strip and an edge of said web, including means extending through the slot of said rail, and power drive means engaging said leader strip to feed it through the tubular guide rail.
2. Apparatus as set forth in claim 1, in which said connecting means includes a member having a hook connection with said leader strip which is movable through said tubular rail and having a lateral portion extending through said slot and connected to an edge of said web.
3. Apparatus as set forth in claim 2, in which said leader strip is provided with end portions having a thickness greater than the width of said guide rail slot, said end portions being provided with means comprising part of hook connection of said Web connecting means.
4. Apparatus as set forth in claim 1, in which said power drive means includes roll means at the ends of said web supporting rolls engaging the leader strip on both sides to grip and drive it.
5. Apparatus as set forth in claim 4, in which said roll means includes driven supporting rolls and resiliently biased pressure rolls engaging the leader strip.
References Cited in the file of this patent UNITED STATES PATENTS 1,700,099 Shively Jan. 22, 1929 2,792,185 Julliard May 14, 1957 2,812,937 Robinson Nov. 12, 1957 2,944,345 Faeber July 12, 1960 FOREIGN PATENTS 1,229,320 France Sept. 6, 1960

Claims (1)

1. APPARATUS FOR THREADING THE LEADING END OF A WEB THROUGH DRYING APPARATUS HAVING A PLURALITY OF WEB SUPPORTING ROLLS AT THE ENDS OF WEB-DRYING PASSAGES, COMPRISING IN COMBINATION, A CONTINOUS TUBULAR GUIDE RAIL ARRANGED AT AT LEAST ONE END OF SAID ROLLS AND FOLLOWING THE WEB PATH BETWEEN AND AROUND SAID ROLLS, SAID TUBULAR GUIDE RAIL HAVING A CONTINOUS SLOT ON THE SIDE TOWARD THE WEB PATH, A FLEXIBLE RESILIENT LEADER STRIP MOVABLE ALONG THE TUBULAR SPACE OF SAID GUIDE RAIL, CONNECTING MEANS BETWEEN SAID LEADER STRIP AND AN EDGE OF SAID WEB, INCLUDING MEANS EXTENDING THROUGH THE SLOT OF SAID RAIL, AND POWER DRIVE MEANS ENGAGING SAID LEADER STRIP TO FEED IT THROUGH THE TUBULAR GUIDE RAIL.
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Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3195825A (en) * 1961-11-17 1965-07-20 Philips Corp Recording and reproducing apparatus
US3313247A (en) * 1964-08-28 1967-04-11 Gen Mills Inc Food processing apparatus
US3459352A (en) * 1967-10-30 1969-08-05 William L Ingram Retriever for the broken ends of strip material in an enclosed tank
US3462054A (en) * 1967-03-20 1969-08-19 Eastman Kodak Co Multiple strip leader
US3656676A (en) * 1970-12-03 1972-04-18 Henry E Hope Film transport roller system
US3771705A (en) * 1973-01-02 1973-11-13 Burroughs Corp Paper tape loading tool
US4111122A (en) * 1975-07-18 1978-09-05 Koenig & Bauer Aktiengesellschaft Method of and apparatus for threading web material preferably into web-fed rotary printing presses
US4370927A (en) * 1980-04-23 1983-02-01 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Paper web threading apparatus for rotary printing machines
US4501037A (en) * 1983-04-11 1985-02-26 Hitco Method for introducing heat-sensitive material into a hot environment
DE3405294A1 (en) * 1984-02-15 1985-08-22 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach FEEDER FOR ROLLER ROTARY PRINTING MACHINES
EP0221524A2 (en) * 1985-11-08 1987-05-13 Hoechst Aktiengesellschaft Arrangement for drawing webs
US4723698A (en) * 1985-07-10 1988-02-09 Stork Brabant B.V. Device for introducing a strip of material between the rollers of a loop take-up apparatus
US4929976A (en) * 1989-03-15 1990-05-29 Jamieson Film Company Film transport system
US5052295A (en) * 1989-09-20 1991-10-01 Kabushiki Kaisha Tokyo Kikai Seisakusho Paper web threading apparatus for rotary printing press
US5249373A (en) * 1991-01-29 1993-10-05 W. R. Grace & Co.-Conn. Web threading system
US5397044A (en) * 1990-08-28 1995-03-14 Kabushiki Kaisha Tokyo Kikai Seisakusho Paper web threading apparatus for paper web handling machine
US5400940A (en) * 1989-04-04 1995-03-28 Kabushiki Kaisha Tokyo Kikai Seisakusho Paper web threading apparatus for rotary printing press
US5455652A (en) * 1992-09-17 1995-10-03 Eastman Kodak Company Photographic transport mechanisms
US5967036A (en) * 1997-04-10 1999-10-19 Heidelberger Druckmaschinen Ag Web infeed device for rotary printing presses
US20030062247A1 (en) * 2001-09-06 2003-04-03 Kabushiki Kaisha Bridgestone Conveyor device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1700099A (en) * 1926-02-27 1929-01-22 Goodyear Tire & Rubber Attachment for calenders
US2792185A (en) * 1951-11-19 1957-05-14 Julliard Maurice Fixing of films on the spools of photographic and cinematographic apparatus
US2812937A (en) * 1954-05-07 1957-11-12 Eleanor R Robinson Leader for flexible materials
US2944345A (en) * 1958-01-30 1960-07-12 Time Inc Drive mechanism for web threading apparatus
FR1229320A (en) * 1958-12-04 1960-09-06 Svenska Flaektfabriken Ab Method and apparatus for threading material in the form of a strip

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1700099A (en) * 1926-02-27 1929-01-22 Goodyear Tire & Rubber Attachment for calenders
US2792185A (en) * 1951-11-19 1957-05-14 Julliard Maurice Fixing of films on the spools of photographic and cinematographic apparatus
US2812937A (en) * 1954-05-07 1957-11-12 Eleanor R Robinson Leader for flexible materials
US2944345A (en) * 1958-01-30 1960-07-12 Time Inc Drive mechanism for web threading apparatus
FR1229320A (en) * 1958-12-04 1960-09-06 Svenska Flaektfabriken Ab Method and apparatus for threading material in the form of a strip

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3195825A (en) * 1961-11-17 1965-07-20 Philips Corp Recording and reproducing apparatus
US3313247A (en) * 1964-08-28 1967-04-11 Gen Mills Inc Food processing apparatus
US3462054A (en) * 1967-03-20 1969-08-19 Eastman Kodak Co Multiple strip leader
US3459352A (en) * 1967-10-30 1969-08-05 William L Ingram Retriever for the broken ends of strip material in an enclosed tank
US3656676A (en) * 1970-12-03 1972-04-18 Henry E Hope Film transport roller system
US3771705A (en) * 1973-01-02 1973-11-13 Burroughs Corp Paper tape loading tool
US4111122A (en) * 1975-07-18 1978-09-05 Koenig & Bauer Aktiengesellschaft Method of and apparatus for threading web material preferably into web-fed rotary printing presses
US4370927A (en) * 1980-04-23 1983-02-01 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Paper web threading apparatus for rotary printing machines
US4501037A (en) * 1983-04-11 1985-02-26 Hitco Method for introducing heat-sensitive material into a hot environment
US4598850A (en) * 1984-02-15 1986-07-08 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Web threading arrangement for threading a paper web through a rotary printing machine
DE3405294A1 (en) * 1984-02-15 1985-08-22 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach FEEDER FOR ROLLER ROTARY PRINTING MACHINES
US4723698A (en) * 1985-07-10 1988-02-09 Stork Brabant B.V. Device for introducing a strip of material between the rollers of a loop take-up apparatus
EP0221524A2 (en) * 1985-11-08 1987-05-13 Hoechst Aktiengesellschaft Arrangement for drawing webs
EP0221524A3 (en) * 1985-11-08 1989-03-22 Hoechst Aktiengesellschaft Arrangement for drawing webs
US4929976A (en) * 1989-03-15 1990-05-29 Jamieson Film Company Film transport system
US5400940A (en) * 1989-04-04 1995-03-28 Kabushiki Kaisha Tokyo Kikai Seisakusho Paper web threading apparatus for rotary printing press
US5052295A (en) * 1989-09-20 1991-10-01 Kabushiki Kaisha Tokyo Kikai Seisakusho Paper web threading apparatus for rotary printing press
US5397044A (en) * 1990-08-28 1995-03-14 Kabushiki Kaisha Tokyo Kikai Seisakusho Paper web threading apparatus for paper web handling machine
US5249373A (en) * 1991-01-29 1993-10-05 W. R. Grace & Co.-Conn. Web threading system
US5455652A (en) * 1992-09-17 1995-10-03 Eastman Kodak Company Photographic transport mechanisms
US5967036A (en) * 1997-04-10 1999-10-19 Heidelberger Druckmaschinen Ag Web infeed device for rotary printing presses
US20030062247A1 (en) * 2001-09-06 2003-04-03 Kabushiki Kaisha Bridgestone Conveyor device
US6688508B2 (en) * 2001-09-06 2004-02-10 Kabushiki Kaisha Bridgestone Conveyor device

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