EP0634352B1 - Procédé et machine pour le pliage de mouchoirs en papier et similaires - Google Patents

Procédé et machine pour le pliage de mouchoirs en papier et similaires Download PDF

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Publication number
EP0634352B1
EP0634352B1 EP94830349A EP94830349A EP0634352B1 EP 0634352 B1 EP0634352 B1 EP 0634352B1 EP 94830349 A EP94830349 A EP 94830349A EP 94830349 A EP94830349 A EP 94830349A EP 0634352 B1 EP0634352 B1 EP 0634352B1
Authority
EP
European Patent Office
Prior art keywords
rollers
cylinder
folding
holes
machine
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
EP94830349A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0634352A1 (fr
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
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Filing date
Publication date
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Publication of EP0634352A1 publication Critical patent/EP0634352A1/fr
Application granted granted Critical
Publication of EP0634352B1 publication Critical patent/EP0634352B1/fr
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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 tissue paper folding machine, towels and the like.
  • machines for folding tissues include: a group of unwinding of a continuous strip of sampled paper from a reel; an embossing group for print relief decorations on paper; a cutting group to form several strips or "working channels” from the main strip powered from the coil; ways to longitudinal folding of the different strips in continued; a transverse cutting group or “slicing" of the strips thus folded to form individual handkerchiefs, with a pair of cylinders, one says “cutting” and the other says “of maintenance "of the product, on the surfaces of which adhere to the strip segments that have been cut, thanks to a suction action carried out on them, from inside the rollers, by means of a plurality of communicating surface holes with corresponding internal chambers air suction; a third cylinder, called “folding cylinder", with the active surface with several communicating through holes with corresponding internal chambers suction to retain the product during processing, which is contiguous to the cylinder of holding and intended to take the segments from paper from the latter, after activation a corresponding group of valves
  • 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 suction efficiency turns out gradually decreasing from the ends towards the center of the cylinders.
  • the main object of the present invention is to eliminate the aforementioned drawbacks. This result has been achieved, in accordance with the invention, by adopting a method for folding handkerchiefs and the like, according to claim 1. And as regards the machine for carrying out said method, it comprises the characteristics according to claim 2. Other features are provided in claims 3 to 6.
  • the advantages obtained thanks to the present invention basically consist of what is possible ensure uniform and efficient suction of the air along the entire length of the axis of each machine cylinder even with low differential pressure values between the inside and outside of the cylinders, without resort to no excess suction and reduce thus strongly energy consumption corresponding and the manufacturing cost of handkerchiefs; that the rollers and cylinders of paper processing of the type described above are simple, economical and reliable to manufacture, even after an extended period of service; that it is possible to improve the quality of the finished product by effect of more correct and effective restraint of paper segments on the active surface of cylinders thanks to the uniformity of the depression in each area of the cylinder surface; that he is possible to manufacture machines from any what width allowed, with a large number of working channels, without using any surplus and ensuring on every occasion the proper functioning of the machines themselves and the good paper retention on the active surfaces of aforementioned cylinders and rollers, and thereby increase 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 represents the front view of the group of the cylinders of the machine of FIG. 1
  • Fig. 4 represents 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 view in detailed longitudinal section of a segment of the machine folding cylinder 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 represents the front view of the group of the cylinders of the machine of FIG. 1
  • Fig. 4 represents 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 view in detailed longitudinal section of a segment of the machine folding cylinder of fig. 1
  • FIG. 7 shows the sectional view along line A-A of the detailed view of FIG. 6;
  • Fig. 8 represents the detailed longitudinal section view of a portion of the cutting cylinder of the machine of FIG. 1, with the bedrooms suction width equal to two channels of job;
  • Fig. 9 shows the sectional view along line C-C of the detailed view of the Fig. 8;
  • Fig. 10 shows the sectional view along line B-B of the detailed view of the Fig. 8;
  • Fig. 11 shows the sectional view longitudinal of a cylinder like that of FIG. 8, but with width suction chambers equal to a working channel.
  • the machine includes a plurality cylinders and rollers for cutting and transverse folding of the paper, each of which with its respective active surface provided with several groups of through holes which communicate with corresponding internal suction chambers air.
  • the folding cylinder (2) of the machine consists of a plurality of coaxial cylindrical segments (20) connected in unidirectional cascade with 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 corresponding main suction chamber (28).
  • 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 rectangular plate (34) corresponding 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 air suction installation (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 further increases 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) as regards 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 Procédé et machine pour le pliage de mouchoirs en papier et similaires Expired - Lifetime EP0634352B1 (fr)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=11350534

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94830349A Expired - Lifetime EP0634352B1 (fr) 1993-07-15 1994-07-11 Procédé et machine pour le pliage de mouchoirs en papier et similaires

Country Status (5)

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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Family Cites Families (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
IT1213807B (it) * 1987-07-28 1990-01-05 Perini Finanziaria Spa Apparecchiatura per la produzione ed il confezionamento di tovagliolini da nastro continuo in carta od altro

Also Published As

Publication number Publication date
ES2127907T3 (es) 1999-05-01
DE69415227D1 (de) 1999-01-28
DE69415227T2 (de) 1999-07-08
ATE174572T1 (de) 1999-01-15
ITFI930132A0 (it) 1993-07-15
IT1263095B (it) 1996-07-24
EP0634352A1 (fr) 1995-01-18
ITFI930132A1 (it) 1995-01-15

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