EP0634352A1 - Vorrichtung und Verfahren zum Falten von Taschentücher aus Papier und dergleichen - Google Patents

Vorrichtung und Verfahren zum Falten von Taschentücher aus Papier und dergleichen Download PDF

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Publication number
EP0634352A1
EP0634352A1 EP94830349A EP94830349A EP0634352A1 EP 0634352 A1 EP0634352 A1 EP 0634352A1 EP 94830349 A EP94830349 A EP 94830349A EP 94830349 A EP94830349 A EP 94830349A EP 0634352 A1 EP0634352 A1 EP 0634352A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
folding
several
rollers
suction
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.)
Granted
Application number
EP94830349A
Other languages
English (en)
French (fr)
Other versions
EP0634352B1 (de
Inventor
Renzo Tommasi
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.)
Rent SRL
Original Assignee
Rent SRL
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 Rent SRL filed Critical Rent SRL
Publication of EP0634352A1 publication Critical patent/EP0634352A1/de
Application granted granted Critical
Publication of EP0634352B1 publication Critical patent/EP0634352B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/24—Delivering or advancing articles from machines; Advancing articles to or into piles by air blast or suction apparatus
    • B65H29/241—Suction devices
    • B65H29/243—Suction rollers
    • 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
    • B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
    • B31D1/00—Multiple-step processes for making flat articles ; Making flat articles
    • B31D1/04—Multiple-step processes for making flat articles ; Making flat articles the articles being napkins, handkerchiefs, towels, doilies, or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/16—Rotary folders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/28—Folding in combination with cutting

Definitions

  • the present invention relates to a method and a machine for folding tissues, towels and the like.
  • machines for folding handkerchiefs include: a group for unwinding a continuous strip of paper taken from a reel; an embossing group for printing relief decorations on paper; a cutting group for forming several strips or "working channels” from the main strip supplied from the spool; means for longitudinal folding of the different strips continuously; a group of transverse cutting or “slicing" of the strips thus folded to form individual handkerchiefs, with a pair of cylinders, one said to be “cutting” and the other said to “hold” the product, on the surfaces of which adhere the strip segments which have been cut, by means of a suction action carried out on them, from the inside of the rollers, by means of a plurality of surface holes communicating with corresponding internal suction chambers of the air; a third cylinder, called “folding cylinder", with the active surface provided with several through holes communicating with corresponding internal suction chambers to retain the product being processed, which is contiguous to the holding cylinder and intended to take up the segments of paper from the latter, after
  • German patents DE 3439211A1, DE 3243778A1 and DE 3241869A1 describe as many devices for folding paper tissues and the like in machines based on the operating methodology mentioned above and which relate, more particularly, to the suction system of the air in the different folding cylinders. Substantially, they are hollow cylinders, with the active surface pierced at several points so as to be communicating with an internal suction chamber and from which the air is sucked through one or both of its ends. But this results in a non-uniform distribution of the pressure lines along the axial direction of the cylinders, mainly due to the pressure losses due to the large length of the cylinders themselves, so that the efficiency of the suction is progressively decreasing from the ends towards the center of the cylinders.
  • the machine for carrying out said method comprises a plurality of cylinders and auxiliary rollers for cutting and transverse folding of the paper, in which the active surfaces of the cutting cylinder and auxiliary rollers are provided of several groups of through holes, which are communicating with corresponding internal chambers, each of which having a length approximately equal to the width of one or two working channels and being connected, coincident with its center line, to a corresponding fixed valve , coaxial with the respective cylinder or roller, supported by the latter, and connected to an air suction installation to allow intermittent suction programmed in correspondence of said holes.
  • the folding cylinder is subdivided into several coaxial cylindrical segments in unidirectional cascade, each of which has a reduced length, and with the active surface provided with several groups of through holes: each group of holes communicating with an internal chamber connected with a corresponding fixed valve , which is internal and coaxial to the cylinder and slaved to the aforementioned installation to allow intermittent suction of the air in correspondence of said holes in a programmed sequence.
  • the advantages obtained thanks to the present invention essentially consist in the fact that it is possible to ensure a uniform and efficient suction of air over the entire length of the axis of each cylinder of the machine, even with low values of differential pressure between the inside and outside of the cylinders, without using any excess suction and thus greatly reducing energy consumption corresponding and the cost of manufacturing handkerchiefs; that the paper processing rollers and cylinders of the type described above are simple, economical and reliable to manufacture, even after an extended service period; that it is possible to improve the quality of the finished product by the effect of the more correct and effective retention of the paper segments on the active surface of the cylinders thanks to the uniformity of the depression in each zone of the surface of the cylinders; that it is possible to manufacture machines of any authorized width, with a large number of working channels, without resorting to any excess suction and ensuring on each occasion the proper functioning of the machines themselves and the good retention of the paper on the active surfaces of the aforementioned cylinders and rollers, and thus increasing production as required by the market.
  • FIG. 1 schematically represents the side view of a machine according to the invention
  • Fig. 2 shows the plan view of the machine of FIG. 1
  • Fig. 3 shows the front view of the group of cylinders of the machine of FIG. 1
  • Fig. 4 shows the right side view of the group of the Fig. 3
  • Fig. 5 shows the plan view of the group of FIG. 3
  • Fig. 6 shows the detailed longitudinal section view of a segment of the folding cylinder of the machine of FIG. 1;
  • Fig. 1 schematically represents the side view of a machine according to the invention
  • Fig. 2 shows the plan view of the machine of FIG. 1
  • Fig. 3 shows the front view of the group of cylinders of the machine of FIG. 1
  • Fig. 4 shows the right side view of the group of the Fig. 3
  • Fig. 5 shows the plan view of the group of FIG. 3
  • Fig. 6 shows the detailed longitudinal section view of a segment of the folding cylinder of the machine of FIG. 1
  • FIG. 7 shows the sectional view along line AA of the detailed view of FIG. 6;
  • Fig. 8 shows the detailed longitudinal section view of a portion of the cutting cylinder of the machine of FIG. 1, with the suction chambers of width equal to two working channels;
  • Fig. 9 shows the sectional view along line CC of the detailed view of FIG. 8;
  • Fig. 10 shows the sectional view along line BB of the detailed view of FIG. 8;
  • Fig. 11 represents the view in longitudinal section of a cylinder like that of FIG. 8, but with the suction chambers of width equal to a working channel.
  • the machine for implementing said method comprises a plurality of cylinders and rollers for cutting and transversely folding the paper, each of which with its respective active surface provided with several groups of through holes which communicate with corresponding internal air intake chambers.
  • the folding cylinder (2) of the machine consists of a plurality of coaxial cylindrical segments (20) connected in unidirectional cascade with the interposition of a fixed valve (21) between each pair of segments (20 ) contiguous, which is connected to a source (AS) of air suction, so as to delimit a main suction chamber (28) corresponding.
  • each segment (20) of the cylinder (2) is appropriately grooved longitudinally and in correspondence with each groove is fixed a rectangular plate (23) with several holes (24) through, so as to define a plurality of chambers (22) which communicate with said chamber (28) by means of several radial through holes (29), in programmed succession controlled by the valve (21) with the rotation of the cylinder (2) .
  • Each segment (20) of the cylinder (2) is mounted on a corresponding support (25) wedged on a horizontal shaft (26).
  • Each valve (21) is connected to the support '(25) of the respective segment (20) by means of two bearings (27). The rotation of the shaft (26) causes the corresponding rotation of the segments (20) of the cylinder (2) relative to the air suction valves (21).
  • each segment (20) are in communication with the corresponding chamber (28) in the desired sequence, via the radial holes (29).
  • each group of holes (24) is slaved to the desired sequential suction, so as to allow the retention and respectively the programmed release of the paper on the active surface of the corresponding cylindrical segment (20).
  • the cutting cylinder (3) is made in one piece, with the active surface provided with several longitudinal grooves, each of which has a length equal to the width of two working channels and with a corresponding rectangular plate (34) provided with several through holes (35), so as to delimit as many chambers (33), each of which communicates through an opening (36) with a fixed valve (32) arranged in correspondence of its center line and connected to the suction installation air (AS): said valve (32) being coaxial with the cylinder (3) and supported by the latter.
  • each of said longitudinal grooves has a length equal to the width of a working channel. This makes it possible to subsequently increase the uniformity of the suction flow and thus the efficiency of the machine.
  • the auxiliary rollers (4) their manufacture is identical to that described above for the cutting cylinder (3). More particularly, the auxiliary rollers (4) have the active surface provided with several internal suction chambers, which have a length equal to the width of one or two working channels and are connected to corresponding valves controlled by an installation of air suction (AS): said suction chambers being delimited by as many longitudinal grooves made on the active surface of the rollers and covered by corresponding plates provided with several through holes so as to achieve direct pneumatic communication between the suction chambers and the active surface of the rollers (4).
  • AS air suction
  • the subdivision of the cylinder (2) into several segments (20), each of which provided with a main suction chamber (28) of reduced length to exert the action of retaining the paper on the active surface, makes it possible to obtain a uniform and correct distribution of pressure lines over the entire length of the cylinder axis (2). This makes it possible to make the treatment carried out by means of the folding cylinder (2) more efficient, and consequently to improve the quality of the finished product. Furthermore, this makes it possible to drastically reduce the pressure losses associated with the action of suction of the air inside the cylinder (2). What has been said applies analogously to the cylinder (3) and to the rollers (4) with regard to the subdivision of the suction action between the different suction chambers (33) distributed along their axes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Sanitary Thin Papers (AREA)
EP94830349A 1993-07-15 1994-07-11 Vorrichtung und Verfahren zum Falten von Taschentüchern aus Papier und dergleichen Expired - Lifetime EP0634352B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITFI930132A IT1263095B (it) 1993-07-15 1993-07-15 Metodo e macchina per la piegatura di fazzoletti di carta e simili
ITFI930132 1993-07-15

Publications (2)

Publication Number Publication Date
EP0634352A1 true EP0634352A1 (de) 1995-01-18
EP0634352B1 EP0634352B1 (de) 1998-12-16

Family

ID=11350534

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94830349A Expired - Lifetime EP0634352B1 (de) 1993-07-15 1994-07-11 Vorrichtung und Verfahren zum Falten von Taschentüchern aus Papier und dergleichen

Country Status (5)

Country Link
EP (1) EP0634352B1 (de)
AT (1) ATE174572T1 (de)
DE (1) DE69415227T2 (de)
ES (1) ES2127907T3 (de)
IT (1) IT1263095B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106739174A (zh) * 2016-12-23 2017-05-31 泉州智信专利技术开发有限公司 一种纸巾机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB662947A (en) * 1949-02-02 1951-12-12 Harris Seybold Co Improvements in or relating to a sheet delivery mechanism for machines such as printing machines
AU460068B2 (en) * 1972-07-04 1975-04-17 Wentworth Harris David Improvements in or relating tothe manufacture of paper serviettes
DE2439790A1 (de) * 1970-12-24 1976-03-11 Koenig & Bauer Ag Bogenzufuehrung bei druckmaschinen
EP0302031A2 (de) * 1987-07-28 1989-02-01 FABIO PERINI S.p.A. Vorrichtung zum Falten und Aufstapeln von Servietten, ausgehend von einer endlosen Bahn aus Papier oder einem anderen Material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB662947A (en) * 1949-02-02 1951-12-12 Harris Seybold Co Improvements in or relating to a sheet delivery mechanism for machines such as printing machines
DE2439790A1 (de) * 1970-12-24 1976-03-11 Koenig & Bauer Ag Bogenzufuehrung bei druckmaschinen
AU460068B2 (en) * 1972-07-04 1975-04-17 Wentworth Harris David Improvements in or relating tothe manufacture of paper serviettes
EP0302031A2 (de) * 1987-07-28 1989-02-01 FABIO PERINI S.p.A. Vorrichtung zum Falten und Aufstapeln von Servietten, ausgehend von einer endlosen Bahn aus Papier oder einem anderen Material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106739174A (zh) * 2016-12-23 2017-05-31 泉州智信专利技术开发有限公司 一种纸巾机
CN106739174B (zh) * 2016-12-23 2018-09-07 泉州智信专利技术开发有限公司 一种纸巾机

Also Published As

Publication number Publication date
ATE174572T1 (de) 1999-01-15
DE69415227D1 (de) 1999-01-28
IT1263095B (it) 1996-07-24
EP0634352B1 (de) 1998-12-16
DE69415227T2 (de) 1999-07-08
ES2127907T3 (es) 1999-05-01
ITFI930132A0 (it) 1993-07-15
ITFI930132A1 (it) 1995-01-15

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