EP2311763B1 - Machine for forming packs of folded napkins, provided with means for synchronizing the speed of advancing movement of the pack separating element - Google Patents
Machine for forming packs of folded napkins, provided with means for synchronizing the speed of advancing movement of the pack separating element Download PDFInfo
- Publication number
- EP2311763B1 EP2311763B1 EP10187093A EP10187093A EP2311763B1 EP 2311763 B1 EP2311763 B1 EP 2311763B1 EP 10187093 A EP10187093 A EP 10187093A EP 10187093 A EP10187093 A EP 10187093A EP 2311763 B1 EP2311763 B1 EP 2311763B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pack
- napkins
- machine
- longitudinal direction
- advancing
- 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.)
- Not-in-force
Links
Images
Classifications
-
- 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
- B65H33/00—Forming counted batches in delivery pile or stream of articles
- B65H33/02—Forming counted batches in delivery pile or stream of articles by moving a blade or like member into the pile
-
- 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
- B65H45/20—Zig-zag 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
- B65H2513/00—Dynamic entities; Timing aspects
- B65H2513/10—Speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/10—Handled articles or webs
- B65H2701/19—Specific article or web
- B65H2701/1924—Napkins or tissues, e.g. dressings, toweling, serviettes, kitchen paper and compresses
Definitions
- the present invention relates to a machine for forming packs of napkins folded into four, provided with means for synchronizing the speed of advancing movement of the pack separating means.
- the operating devices of the known machines have, however, a structural limitation in that it is not possible to ensure correct and continuous operation of the machine in all those cases where variations in the thickness of the paper strip occur or where there is a variation in the working speed due to the different characteristics of the paper strip and machine stoppages in order to change the reel; this reduces significantly the efficiency of the machine owing to the repeated stoppages, large number of finished product rejects and incorrect transfer of the packs of napkins from the forming machine to the packaging machine.
- the technical problem which is posed, therefore, is to provide a machine for producing napkins and for dividing them into packs formed by a specific and constant number of napkins, said machine being equipped with apparatus which provide a solution to the abovementioned problems of known machines.
- the apparatus should be able to reduce the damage to the sheets at the moment of separation and/or movement away from each other of the two sheets in adjacent packs and that said apparatus should also be suitable for application to ready-existing machines with a limited need for special adaptation.
- a machine for forming packs (P) of napkins folded into four comprising a pair of cylinders for picking up a sheet of paper suitably pre-folded along a longitudinal folding line and feeding said sheet folded along vertical fold lines; said folding means also performing counting of the napkins which must form each pack; a conveying surface with vertical shoulders for supporting and retaining the napkins; means for unloading each pack (P) formed by a given number of napkins and extracted from the machine, said means being associated with at least one sensor able to detect a pressure corresponding to the presence of a complete pack and emit corresponding consent signals to programming and control means; an apparatus for separating the packs formed in succession, which comprises a feeler arm movable rotationally from a lowered position, where it engages with the first napkin in a pack, into a raised position where it does not interfere with the advancing packs (P) and vice versa; said feeler arms being mounted on a transverse shaft operated rotationally by associated pneumatic means and displaceably by
- the machine according to the present invention comprises essentially:
- the operating device which produces the displacement of the flanges 210 is formed by an electric motor 300, which is preferably of the brushless or stepper type, controlled by the programming means 1000 which also control the sequences of movements of the various parts of the machine, which programming means are also able to control the speed of rotation of the cylinders 10 and therefore the speed of advancing movement of the sheet 2; this means that the advancing movement of the packs P and extraction thereof is always linked to the actual speed of movement of the sheet 2 which forms the napkins, this being a factor which, as will emerge more clearly below, is decisive for correct operation of the machine when there is variation in the characteristics of the paper.
- the constructional details of the mechanical supporting and transmission parts are not described here, since they are conventional per se and lie within the competence of the person skilled in the art.
- the decisive factor in the sequence of movements described above is the advancing movement of the flanges 210 from the retracted engaged position F2 into the advanced disengaged position F1 produced by the motor 300, the speed of rotation of which is controlled by the programming device 1000 linked also to the speed of rotation of the two cylinders 10 and therefore to the speed of advancing movement of the sheet 1 entering the cylinders, so that any variation in the speed of movement of the sheet 1, due to different characteristics of the paper, is compensated for by a corresponding different speed of movement of the flange 210 which thus compensates for any different speeds of movement and prevents incorrect formation of the packs present on the conveying surface along the entire exit section from the cylinders/unloading means.
Landscapes
- Auxiliary Devices For And Details Of Packaging Control (AREA)
- Container Filling Or Packaging Operations (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Description
- The present invention relates to a machine for forming packs of napkins folded into four, provided with means for synchronizing the speed of advancing movement of the pack separating means.
- In the paper processing industry it is known that there are machines for the production of paper napkins formed from a continuous strip which is folded in the longitudinal direction (parallel to the direction of advancing movement) and fed to a pair of counter-rotating cylinders provided with means for producing a fold in the same strip in the transverse direction so as to form a continuous pleat which is moved forwards, in a guided manner, towards a fixed blade which cuts the pleat into two in the longitudinal direction, producing two rows of napkins which are folded and separate from each other and which are moved forwards in a parallel manner along the machine.
- It is also known that the two rows of napkins must be divided into separate packs which are each formed by a precise and specific number of napkins and which must be removed from the forming machine and supplied to the packaging machine for packaging thereof.
- Although performing their function, the operating devices of the known machines have, however, a structural limitation in that it is not possible to ensure correct and continuous operation of the machine in all those cases where variations in the thickness of the paper strip occur or where there is a variation in the working speed due to the different characteristics of the paper strip and machine stoppages in order to change the reel; this reduces significantly the efficiency of the machine owing to the repeated stoppages, large number of finished product rejects and incorrect transfer of the packs of napkins from the forming machine to the packaging machine.
- The technical problem which is posed, therefore, is to provide a machine for producing napkins and for dividing them into packs formed by a specific and constant number of napkins, said machine being equipped with apparatus which provide a solution to the abovementioned problems of known machines.
- In connection with this problem a further requirement is that the apparatus should be able to reduce the damage to the sheets at the moment of separation and/or movement away from each other of the two sheets in adjacent packs and that said apparatus should also be suitable for application to ready-existing machines with a limited need for special adaptation.
- These results are achieved according to the present invention by a machine for forming packs (P) of napkins folded into four, comprising a pair of cylinders for picking up a sheet of paper suitably pre-folded along a longitudinal folding line and feeding said sheet folded along vertical fold lines; said folding means also performing counting of the napkins which must form each pack; a conveying surface with vertical shoulders for supporting and retaining the napkins; means for unloading each pack (P) formed by a given number of napkins and extracted from the machine, said means being associated with at least one sensor able to detect a pressure corresponding to the presence of a complete pack and emit corresponding consent signals to programming and control means; an apparatus for separating the packs formed in succession, which comprises a feeler arm movable rotationally from a lowered position, where it engages with the first napkin in a pack, into a raised position where it does not interfere with the advancing packs (P) and vice versa; said feeler arms being mounted on a transverse shaft operated rotationally by associated pneumatic means and displaceably by associated pneumatic cylinders (114) designed to move the feeler arms from a position (M1) advanced in the longitudinal direction (X-X), where the downwards rotation occurs, into a position (M2) retracted in the same longitudinal direction, where the feeler arms are raised; means for retaining the advancing packs (P) in the longitudinal direction (X-X), substantially comprising a pair of flanges movable rotationally about an axis parallel to the longitudinal direction (X-X) from a raised non-interfering position into a lowered position where they interfere with the first pack (Pn) which is advancing towards the unloading means; said retaining means being mounted on a respective longitudinal pin rotationally operated by associated pneumatic actuating means where the flanges are displaceable in the longitudinal direction (X-X) from an advanced position close to the unloading means where the upwards rotation for disengagement from the pack (P) occurs into a retracted position (F2) where they rotate downwards so as to interfere with the advancing pack (P), the means for performing displacement of the flanges comprising an electric motor controlled by the programming and control means which determine the sequences of movements of the various parts of the machine and said programming and control means being able to detect the speed of rotation of the cylinders and therefore advancing movement of the sheet and determine a corresponding speed of forwards displacement of the flanges.
- Further details may be obtained from the following description of a non-limiting example of embodiment of the subject of the present invention provided with reference to the accompanying drawings in which:
- Figure 1:
- shows a schematic top plan view of the machine according to the present invention;
- Figure 2:
- shows a side view of the machine according to
Fig. 1 ; - Figure 3:
- shows a side view of the machine according to
Fig. 1 during completion of a pack of napkins; - Figure 3a:
- shows a front view of the machine according to
Fig. 3 ; - Figure 4:
- shows a side view of the machine according to
Fig. 1 during unloading of the completed pack; and - Figure 4a:
- shows a front view of the machine according to
Fig. 4 . - As shown in
Figs. 1 and 2 and assuming solely for the sake of convenience of description and without any limitation in meaning a set of three reference axes in a longitudinal direction X-X, transverse direction Y-Y and vertical direction Z-Z, respectively, as well as a front part corresponding to the part where the packs of napkins exit and a rear part opposite to the front part, the machine according to the present invention comprises essentially: - a pair of
cylinders 10 which are fed with a sheet ofpaper 1 suitably pre-folded along a longitudinal folding line by means 1a; upon leaving thecylinders 10 saidsheet 1 is already folded along vertical fold lines 1b so as to form acontinuous strip 2 which is folded into four and which, pushed by the rotation of thecylinders 10 towards the front part of the machine, is intercepted by acutting blade 2a which, acting in the longitudinal direction, cuts the strip, forming two lines of napkins 1c folded into four and individually separated from each other; - a
surface 20 withvertical shoulders 21 for supporting and retaining the napkins 1c; - means 30 for retaining and unloading each pack P which is formed by a given number of napkins and is extracted from the machine and conveyed to the packaging machine (not shown);
- sensor means 40 associated with the retaining and unloading means 30 and designed to detect the presence of a complete pack P by means of the pressure exerted longitudinally by the same and emit the start-of-cycle signals of the separation apparatus;
- an
apparatus 100 for separating packs P1..Pn formed in succession, said apparatus comprising:- a pair of
feeler arms 110, one for each line of napkins 1c, which are movable rotationally about an axis parallel to the transverse direction Y-Y, from a lowered position into a raised position and vice versa so as to interfere with / free the advancing packs P and retain / allow movement thereof in the longitudinal direction X-X; said feeler arms being mounted on atransverse shaft 112 operated by associatedpneumatic means 111;
- a pair of
- means 200 for retaining the advancing packs P in the longitudinal direction X-X, substantially comprising a pair of
flanges 210 movable rotationally about an axis parallel to the longitudinal direction X-X from a raised non-interfering position into a lowered position where they interfere with the first pack P which is advancing towards theunloading means 30; said retaining means being mounted on a respectivelongitudinal pin 211 rotationally operated by associatedpneumatic operating means 213. - It is also envisaged that:
- the
feeler arms 110 are displaceable from a start-of-cycle position M1 advanced in the longitudinal direction X-X, where the downwards rotation and engagement with the first napkin in the advancing pack occur, into a position M2 retracted in the same longitudinal direction X-X, where the feeler arms are raised; said displacement is produced by means of pneumatic cylinders 114, the rod of which acts on across-piece 114a supporting theshaft 112 of the feeler arms. - the
flanges 210 are in turn displaceable in the longitudinal direction X-X independently of the displacement of thefeeler arms 110 from a start-of-cycle position F1 close to the retaining and unloading means 30 where the upwards rotation for disengagement from the pack P occurs into a retracted position where the flanges rotation downwards so as to interfere with the advancing pack P. - The operating device which produces the displacement of the
flanges 210 is formed by anelectric motor 300, which is preferably of the brushless or stepper type, controlled by the programming means 1000 which also control the sequences of movements of the various parts of the machine, which programming means are also able to control the speed of rotation of thecylinders 10 and therefore the speed of advancing movement of thesheet 2; this means that the advancing movement of the packs P and extraction thereof is always linked to the actual speed of movement of thesheet 2 which forms the napkins, this being a factor which, as will emerge more clearly below, is decisive for correct operation of the machine when there is variation in the characteristics of the paper. The constructional details of the mechanical supporting and transmission parts are not described here, since they are conventional per se and lie within the competence of the person skilled in the art. - With the machine structure described above, the general embodiments of which are already known in the art, the operating principle of the machine in accordance with sequences programmed and controlled by the
unit 100 is as follows: - at the start of the cycle the
feeler arms 110 and theflanges 210 are located in their initial positions, M1 and F1, respectively engaged with and disengaged from the advancing packs Pn-1 and P; - the longitudinally folded
sheet 1 is pulled by thecylinders 10 and expelled by them in the longitudinal direction further folded along vertical folding lines so as to supply a continuous sheet which is already folded into four and which, cut by theblade 2a, gives rise to the formation of rows of correctly folded napkins; - the longitudinal folding device 1a arranged at the entry point of the two cylinders performs simultaneously a synchronized movement from the top downwards so that the succession of a predetermined number of napkins arranges the same with their upper edge at different heights so that the last napkin in the front pack Pn is lower than the first napkin in the immediately adjacent rear pack Pn-1; the same synchronized movement produces the correct number of napkins which form each pack;
- rotation of the two cylinders with feeding of the
sheet 2 folded into four also produces the advancing movement in the longitudinal direction X-Y of the two parallel rows of napkins 1c; - when the pack Pn-1 of each row reaches a predetermined position M1, the
corresponding feeler arm 110, which is rotated downwards, intercepts the first napkin in the pack Pn-1 (Fig.3 ) and retains the whole row until themeans 30 for unloading the front pack Pn start to rotate downwards, separating the two packs and allowing entry of theflanges 210 which are present in the position F2 and, rotating downwards, are arranged in front of the first napkin of the preceding pack Pn-1 (Fig. 4 ); - at this point the
feeler arm 110 rotates upwards, freeing the row of napkins, which is able to advance towards the unloading means 30, retained by theflange 210 which moves forwards together with the napkins upon operation of thedrive motor 300; - when the longitudinal position F1 close to the unloading means 30 is reached, the
flange 210 receives the consent signal from thesensors 40 and rotates upwards, disengaging the pack Pn and allowing the further accumulation of napkins against the unloading means 30 so that, when the pressure exerted on thesensor 40 corresponds to that produced by the exact number of napkins in the pack, the sensor sends a corresponding signal so that themeans 30 rotate again downwards in order to unload the formed pack; at the same time thefeeler arm 110 has lowered again and theflange 210 has been recalled into the initial position ready to be lowered when themeans 30 rotate so as to pick up the new pack Pn-1 being formed. - The decisive factor in the sequence of movements described above is the advancing movement of the
flanges 210 from the retracted engaged position F2 into the advanced disengaged position F1 produced by themotor 300, the speed of rotation of which is controlled by theprogramming device 1000 linked also to the speed of rotation of the twocylinders 10 and therefore to the speed of advancing movement of thesheet 1 entering the cylinders, so that any variation in the speed of movement of thesheet 1, due to different characteristics of the paper, is compensated for by a corresponding different speed of movement of theflange 210 which thus compensates for any different speeds of movement and prevents incorrect formation of the packs present on the conveying surface along the entire exit section from the cylinders/unloading means. - Although described in connection with certain constructional forms and certain preferred examples of embodiment of the invention, it is understood that the scope of protection of the present patent is defined solely by the following claims.
Claims (4)
- Machine for forming packs (P) of napkins (1c) folded into four, comprising:- a pair of cylinders (10) for picking up a sheet of paper (1) suitably pre-folded along a longitudinal folding line via associated means (1a) and feeding said sheet (1) folded along vertical fold lines (1b) so as to form a continuous strip (2) folded into four; said folding means (1a) also performing counting of the napkins which must form each pack;- a conveying surface (20) with vertical shoulders (21) for supporting and retaining the napkins (1c);- means (30) for unloading each pack (P) formed by a given number of napkins and extracted from the machine, said means being associated with at least one sensor (40) able to detect a pressure corresponding to the presence of a complete pack and emit corresponding consent signals to programming and control means (1000);- an apparatus (100) for separating the packs (P1..Pn) formed in succession, which comprises:said machine being characterized in thata feeler arm (110), for each line of napkins (1c), movable rotationally about an axis parallel to the transverse direction (Y-Y), from a lowered position, where it engages with the first napkin in a pack, into a raised position where it does not interfere with the advancing packs (P) and vice versa; said feeler arms being mounted on a transverse shaft (112) operated rotationally by associated pneumatic means (111) and displaceably by associated pneumatic cylinders (114) designed to move the feeler arms from a position (M1) advanced in the longitudinal direction (X-X), where the downwards rotation occurs, into a position (M2) retracted in the same longitudinal direction, where the feeler arms are raised;means (200) for retaining the advancing packs (P) in the longitudinal direction (X-X), substantially comprising a pair of flanges (210) movable rotationally about an axis parallel to the longitudinal direction (X-X) from a raised non-interfering position into a lowered position where they interfere with the first pack (Pn) which is advancing towards the unloading means (30); said retaining means being mounted on a respective longitudinal pin (211) rotationally operated by associated pneumatic actuating means (213) where the flanges (210) are displaceable in the longitudinal direction (X-X) from an advanced position (F1) close to the unloading means (30) where the upwards rotation for disengagement from the pack (P) occurs into a retracted position (F2) where they rotate downwards so as to interfere with the advancing pack (P),
the means for performing displacement of the flanges (210) comprise an electric motor (300) controlled by the programming and control means (1000) which determine the sequences of movements of the various parts of the machine
and in that
said programming and control means are able to detect the speed of rotation of the cylinders (10) and therefore advancing movement of the sheet (2) and determine a corresponding speed of forwards displacement of the flanges (210). - Machine according to Claim 1, characterized in that it comprises a cutting blade (2a) which, acting in the longitudinal direction, cuts the strip forming two lines of napkins (1c) folded into four and individually separated from each other.
- Machine according to Claim 1, characterized in that said electric motor is of the brushless type.
- Machine according to Claim 1, characterized in that said electric motor is of the stepper type.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI2009A001778A IT1395942B1 (en) | 2009-10-15 | 2009-10-15 | MACHINE FOR THE FORMATION OF PACKED PACKETS OF NAPKINS WITH MEANS OF SYNCHRONIZATION OF THE SPEED OF THE ADVANCEMENT OF THE PARTS SEPARATOR ELEMENT |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2311763A1 EP2311763A1 (en) | 2011-04-20 |
EP2311763B1 true EP2311763B1 (en) | 2012-07-25 |
Family
ID=42335068
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10187093A Not-in-force EP2311763B1 (en) | 2009-10-15 | 2010-10-11 | Machine for forming packs of folded napkins, provided with means for synchronizing the speed of advancing movement of the pack separating element |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2311763B1 (en) |
IT (1) | IT1395942B1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120167527A1 (en) * | 2010-12-30 | 2012-07-05 | C.G. Bretting Manufacturing Co., Inc. | Bulk pack napkin separator |
CN102887393B (en) * | 2012-09-28 | 2015-05-06 | 吴兆广 | Automatic paper piling, clamping and overturning machine for household paper folding machine |
CN104192351B (en) * | 2014-07-22 | 2016-05-11 | 全利机械股份有限公司 | Napkin paper divides stacking device automatically |
CN107521242B (en) * | 2017-01-24 | 2019-01-08 | 公安海警学院 | Scanner/printer |
CN109928257A (en) * | 2019-04-10 | 2019-06-25 | 佛山市协合成机械设备有限公司 | A kind of paper handkerchief folding Fen Da mechanism |
CN110668218A (en) * | 2019-10-28 | 2020-01-10 | 广东万安纸业有限公司 | Full-automatic paper taking machine |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1436961C3 (en) * | 1965-08-13 | 1974-01-24 | Hobema Maschinenfabrik Hermann H. Raths, 4000 Duesseldorf | Dispensing device on a folding device for paper handkerchiefs or the like |
IT1225326B (en) * | 1988-11-29 | 1990-11-06 | O M T Costruzioni Meccaniche S | METHOD AND DEVICE FOR AUTOMATIC UNLOADING AND TRANSFERING OF PAPER NAPKINS FROM A MANUFACTURING MACHINE TO A NAPKIN PACKAGING MACHINE |
DE29507166U1 (en) * | 1995-04-28 | 1995-06-22 | Hobema Maschinenfabrik Hermann H. Raths GmbH & Co KG, 40211 Düsseldorf | Device for the removal of web sections of paper, tissue, nonwoven or the like folded one or more times in the transverse direction. in packages consisting of counted individual pieces from a folding machine |
IT1318731B1 (en) * | 2000-08-04 | 2003-09-10 | O M T S R L | EQUIPMENT FOR THE SEPARATION AND THE MUTUAL REMOVAL OF TWO MOBILE CONSECUTIVE SHEETS ACCORDING TO A DIRECTION OF ADVANCE. |
-
2009
- 2009-10-15 IT ITMI2009A001778A patent/IT1395942B1/en active
-
2010
- 2010-10-11 EP EP10187093A patent/EP2311763B1/en not_active Not-in-force
Also Published As
Publication number | Publication date |
---|---|
ITMI20091778A1 (en) | 2011-04-16 |
EP2311763A1 (en) | 2011-04-20 |
IT1395942B1 (en) | 2012-11-02 |
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