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
  • B65H45/00—Folding thin material
  • B65H45/02—Folding limp material without application of pressure to define or form crease lines
  • B65H45/04—Folding sheets
• • 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
  • B65H45/16—Rotary folders
  • B65H45/162—Rotary folders with folding jaw cylinders
  • B65H45/165—Details of sheet gripping means therefor
• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2406/00—Means using fluid
  • B65H2406/30—Suction means
  • B65H2406/33—Rotary suction means, e.g. roller, cylinder or drum

Definitions

• the invention relates to a device and a method for the transverse folding of a web section. It also relates to a sanitary towel.
• Hygienic towels in the form of handkerchiefs have long been known. They are folded from a tissue blank consisting of tissue paper with the standard dimensions of about 210 mm x 210 mm and packed in stacks of five to ten folded paper tissues in an optionally resealable packaging wrapper.
• the type of folding of the sanitary towels is of greater importance, since it depends on the format and the thickness of the 5-1 Oer stack packed wipes.
• Folded paper handkerchiefs of this type often have a rectangular shape shown in DE 25 12 140 A1 with an aspect ratio of the long to short rectangle side of 2: 1.
• This rectangular shape is achieved by folding the square fabric blank around two longitudinal fold lines, the so-called Z-fold, and then folding it around three transverse fold lines. The folded in this way tissue paper has a thickness of eight folds.
• CONFIRMATION COPY It is therefore an object of the present invention to provide a device with a folded towelette, especially handkerchief while maintaining the previous surface of the unfolded cloth blank has a smaller thickness than known sanitary towels. Furthermore, an associated method for producing a folded sanitary towel is provided which, when folded into a tissue or pocket format while maintaining the previous surface of the unfolded blank fabric has a smaller thickness than known sanitary towels. Furthermore, a handkerchief is provided.
• a device for transverse folding of web sections of paper, tissue or similar materials, in particular hygienic towels with a central folding cylinder and a first and a second Vorbruchfalzzylinder, wherein the axes of rotation of the folding cylinder are aligned parallel to each other, wherein the direction of rotation the central folding cylinder is opposite to the direction of rotation of the first and second Vorbruchfalzzylinders, wherein the folding cylinders each have controllable suction holes for sucking the web portion and having a plurality of bow shafts, wherein the central folding cylinder of a first suction bore for transporting the web portion to the first Vorbruchfalzzylinder, and wherein in the central folding cylinder, a third suction hole and in the first Vorbruchfalzzylinder a second suction hole are provided by the suction of the web portion at its front end a 1/3 convolution, and wherein the second Vorbruchfalzzylinder a sixth suction hole, by the suction of the web portion preferably a
• the invention is based on the consideration that the folded format and the thickness of a sanitary towel depends on the type of folding. A smaller format and a smaller thickness can be achieved by a different type of folding of the sanitary towel. A particularly favorable combination is achievable by folding a handkerchief into three almost equal section lengths with respect to an edge length. A 210 x 210 mm handkerchief can be folded in this way to a format of 70 x 70 mm. But also folds in the approx. 104 x 54 mm (standard format) or the approx. 76 x 54 mm pocket format can be achieved with this type of folding.
• unfolded blank fabrics are fed via a centrally arranged folding cylinder to a first and a second Vorbruchfalzzylinder.
• the axes of rotation of the folding cylinders are each aligned in parallel.
• the direction of rotation of the central folding cylinder is opposite to the direction of rotation of the two Vorbruchfalzzylinder.
• the folding cylinders have controllable suction bores with which the web sections of the cloth blanks are transported further from cylinder to cylinder.
• the web sections are folded transversely to 1/3 of an edge length.
• the fast rotation of the folding cylinders causes large centrifugal forces, which may cause, among other things, a detachment of the web portion preferably at its front end of the central folding cylinder.
• the suction of the web section at the central folding cylinder after passing through the second pre-folding cylinder is critical and therefore requires a special device.
• two suction bores which are referred to as fourth and fifth and are arranged one behind the other in the direction of rotation of the central folding cylinder, are therefore advantageously provided.
• these are in combination with the suction device on the second Vorbruchfalzzylinder so ordered that both the web section is securely held on the central folding cylinder and the desired folding is achieved.
• a preferred embodiment causes the fourth suction hole in an intermediate step after completion of the suction on the second Vorbruchfalzzylinder and supported by a bow shaft that the web section receives another, only auxiliary existing fold.
• This is located inside the railway section directly behind the front of the railway section.
• the fourth suction hole is used only for a short time, so that after the end of the use of the fourth suction hole, the auxiliary fold dissolves again and the remaining suction holes can ensure safe onward transport.
• the front of the paper fold is shifted to the fifth suction hole, which corresponds approximately to the desired fold.
• the fourth and fifth suction holes are arranged so that at any time the paper fold is held by one of the two suction holes.
• the maximum distance between the fourth and fifth suction holes should therefore correspond to the Textilfalzonne.
• the object is achieved according to the invention with a method for transverse folding of web sections of paper, tissue or similar materials, in particular sanitary towels, with a central folding cylinder and a first and a second Vorbruchfalzzylinder, the axes of rotation of the folding cylinders are aligned parallel to each other, wherein the The direction of rotation of the central folding cylinder is opposite to the direction of rotation of the first and second Vorbruchfalzzylinders, the folding cylinders each having controllable suction holes for sucking the web portion, and having a plurality of bow shafts, said web portion by means of a first suction bore on the central folding cylinder to the first Vorbruchfalzzylinder is transported, and wherein provided with a provided in the central folding cylinder third suction hole and provided in the first Vorbruchfalzzylinder second suction hole through the respective suction of the web section at its front end a 1/3 fold is performed, and where by a suction a 1/6 fold in the web section is produced with the aid of a sixth suction
• unfolded cloth blanks are preferably folded around two longitudinal fold lines and two or three transverse fold lines.
• the unfolded blank fabric preferably has a square shape.
• the cloth blank is transported via the central folding cylinder to the first pre-folding cylinder. To guide the separately controllable suction ports are used for this purpose.
• the web section can be folded by a longitudinal fold in the longitudinal direction.
• Commonly used sanitary napkins have a square shape in which first and second edge lengths, i. Long side and transverse side, the same length.
• first and second edge lengths i. Long side and transverse side, the same length.
• the second edge length i. the length of the longitudinal side is three-quarters as long as the first edge length, i. the transverse side.
• the handkerchief can be folded in the same format as well as the actually known handkerchief formats. Due to the shortened side material is saved considerably. Also, the thickness of the folded handkerchief is less, so that is saved in a stack of 5 or 10 sanitary towels to a packet of packaging material.
• FIG. 1 shows a device for the transverse folding of a web section with a central folding cylinder, a first and a second Vorbruchfalzzylinder and a first and second bow shaft in a preparation step
• FIG. 2 shows the device of FIG. 1 in a first folding step
• FIG. 3 shows the device from FIG. 1 in a first intermediate step
• FIG. 4 shows the device from FIG. 1 in a second intermediate step
• FIG. 5 shows the device from FIG. 1 in a second folding step
• FIG. 6 shows the device with additionally shown suction holes
• FIG. 7 shows a handkerchief according to the prior art and a handkerchief according to the invention with two and three transverse folds and two longitudinal folds
• FIG. 8 shows a handkerchief according to the prior art and an inventive handkerchief with two or three transverse folds and a longitudinal fold
• FIG. 9 shows a handkerchief according to the prior art and a handkerchief according to the invention with two or three transverse folds and two longitudinal folds.
• the device 2 for the transverse folding of a web section according to FIG. 1 has a central folding cylinder 8. Adjacent thereto are a first pre-preg-folding cylinder 14 and a second prebreak-folding cylinder 20. A first ironing shaft 26 is disposed between the first preg-folding cylinder 14 and the second prebreak-folding cylinder 20.
• the first pre-preg-folding cylinder 14 is also referred to as 1/3 pre-preg-folding cylinder
• the second pre-preg-folding cylinder 20 is referred to as 1/6 pre-preg-folding cylinder.
• a second stirrup shaft 32 is arranged in the direction of rotation 38 of the central folding cylinder 8 behind the second Vorbruchfalzzylinder 20.
• the direction of rotation 38 of the central folding cylinder 8 corresponds in the clockwise direction, while the directions of rotation 38 of the two Vorbruchfalzzylinder 14, 20 run counterclockwise.
• the axes of rotation of the folding cylinders 8, 14, 20 are aligned parallel to each other.
• the three folding cylinders show each because a coat 40, 46, 52 on.
• the facing lateral surfaces of the central folding cylinder 8 and the first Vorbruchfalzzylinders 14, and the lateral surfaces of the central folding cylinder 8 and the second Vorbruchfalzzylinders 20 each define a passage gap 58 for the web section.
• a knife shaft 64 rotating in the counterclockwise direction is drawn, from which the web section 70 to be processed, in the present exemplary embodiment a handkerchief, is guided onto the central folding cylinder 8.
• separately controllable suction bores are respectively used in the three folding cylinders 8, 14, 20, the position and mode of operation of which will be explained in more detail below.
• the front end 76 of the web section is taken over by the knife shaft 64 with the first suction bore 82 onto the first folding cylinder 8 in the method step illustrated in FIG. 1.
• the front end 76 is just so firmly sucked on a first suction bore 82 that a secure transport on the first folding cylinder 8 is made possible without the web section 70 unintentionally becoming detached.
• the front end 76 is released with the first suction bore 82 and taken over by the first Vorbruchfalzzylinder with a second suction hole 88.
• the web section 70 continues to be held by a third suction hole 94 at the second third of the web section 70 viewed from the front end 76.
• the front end 76 is released from the second suction hole 88.
• the device 2 is shown during a first folding step, which is usually referred to as 1/3 folding.
• the suction effect of the first suction bore 82 has been stopped or switched off, ie, the first suction bore 82 is no longer in action.
• the third suction hole 94 holds the web portion 70 and the handkerchief so firmly that about 1/3 of the imaginary finished folded handkerchief rests backwards on the remaining handkerchief of about 2/3 length, creating a 1/3 fold 140 is formed.
• the handkerchief prepared in this way is now in the direction of rotation 38 of the first folding cylinder 8 in the direction of the second Vorbruchfalzzylinders 20 transports.
• FIG. 3 shows the device 2 in a first intermediate step.
• the third suction hole 94 of the central folding cylinder 8 has released from the handkerchief.
• a sixth suction bore 100 of the second Vorbruchfalzzylinders 20 has now taken over the web portion 70 in the amount of a first fold 106 and sucks him.
• a fourth suction bore 112 and a fifth suction bore 116 are still provided, the web section 70 continue to hold on the central folding cylinder 8 in the process step shown.
• the sixth suction bore 100 now lets go of the web section 70, after which the leading edge 124 is now held by the fourth suction bore 112. In this way, a Hilfsf altkante, which prepares the approximate 1/3 fold in a later step by releasing the track section 70 through the fourth suction hole 112.
• a second intermediate step illustrated in FIG. 4, in which the central folding cylinder 8 has rotated further in a clockwise direction than the first intermediate step, it can be seen that the 1/6 fold at this point in time is not exactly at the leading edge. 3 away from the actual cloth start is positioned. Rather, a small part of the actual cloth start is still held by the fourth suction hole 112. It creates in this way a kink, which is required to initiate the next fold, the so-called 1/6 fold, and favors the holding of the cloth beginning at the central folding cylinder 8.
• the temporary holding of the cloth beginning by the fourth suction bore 112 favors in particular a better distribution of the forces acting, so that the transfer of the cloth and thus the overall process runs more stable.
• the cloth beginning of the fifth suction hole 118 is held. Without the stepped use of the fourth 112 and also the fifth suction hole 118, the cloth beginning could detach from the central folding cylinder 8 and the illustrated folding process would then not be able to be carried out.
• the fourth suction bore 112 has released the web section 70.
• the leading edge 124 jumps to the fifth suction back hole and the inner leg of the cloth start rolling back in the kink of 1/6 fold.
• the handkerchief so folded in this manner is transferred to a dispensing cylinder 142 in a conventional manner under a guide 130.
• the tissue is taken over by a seventh suction bore 148 of the discharge cylinder 142 and released from the fifth suction bore 118.
• the tissue is then placed on a conveyor belt 154.
• FIG. 6 further suction holes, namely an eighth suction hole 160 and a ninth suction hole 168 of the central folding cylinder 8 are located.
• the eighth suction bore 160 assists the fifth suction bore 118 in holding the tissue after the fourth suction bore 112 has released it so that it does not open.
• the ninth suction bore 168 has a supporting effect on the region 174 of the pocket tissue so that it does not open or does not detach from the fifth suction bore 118.
• the area circled in FIG. 6 is shown next to it somewhat larger.
• the longitudinal folding of the web section 70 is advantageously carried out in the usual way in a longitudinal fold or longitudinal seam aggregate arranged in front of a cutting and folding unit.
• a handkerchief 200 according to the prior art with two longitudinal folds 218 and two transverse folds 212 is shown.
• the tissue 200 has a square shape and 210 x 210 mm, for example.
• the edge length 230 of the handkerchief 200 thus corresponds to the edge length 232.
• the handkerchief 200 is in the upper region of FIG. 7 with two folds, in the central region of FIG. 7 in the unfolded state, and in the lower region of the figure in the folded state in plan view shown.
• the edge 224 is drawn in each case filled.
• the tissue 200 with the provided folds 212, 218 in the folded state has the standard Z-format.
• the tissue 200 has two Leksfalze 218 and three Querfalze 212.
• the longitudinal folds 218 extend at right angles to the transverse folds 212. In the collapsed folded state, this sanitary towel is eight fold layers thick.
• an inventive handkerchief 206 shown in FIG. 7, which can be produced with the aid of the method described above, has exactly two transverse folds 212 and two longitudinal folds 218. Again, the Leksfalze 218 perpendicular to the transverse folds 212.
• the edge length 230 is also here 210 mm.
• the edge length 232 corresponds to only about% of the edge length 230. The edge length 232 is thus reduced in the longitudinal direction to 3/4 of the edge length 232 of the known handkerchief.
• the handkerchief 206 is replaced by a rectangular shape when unfolded.
• the handkerchief 206 can now also be folded in the manner of a Z-fold. When folded, it has the same format as the handkerchief 200, but is only 3 ⁇ SO thick. This handkerchief is only six fold layers thick.
• FIG. 8 similar to FIG. 7, a conventional handkerchief 200 and a handkerchief 206 according to the invention are shown. Both handkerchiefs 200, 206 are shown in the lower part of the figure in the so-called book or V-fold.
• the handkerchief 200 has a longitudinal fold 218 and three transverse folds 212.
• the tissue 206 has two transverse folds 212 and a longitudinal fold 218. In both handkerchiefs, the longitudinal folds 218 extend at right angles to the transverse folds 212.
• the format of the folded handkerchief 206 agrees with that of the handkerchief 200. However, also in this folding, the tissue 200 is eight fold layers thick, whereas the handkerchief 206 has only six fold layers.
• the handkerchiefs 200 (prior art) and 206 shown in FIG. 9 each have two longitudinal folds 218, respectively.
• the handkerchief 206 according to the invention has two, the known handkerchief 200 three Querfalze on. Again, the longitudinal folds 218 are perpendicular to the transverse folds 212. Both handkerchiefs are shown in the lower part of the figure in a compact pocket format or mini format. Similar to the embodiments of the handkerchief 206 according to FIGS. 7 and 8, both handkerchiefs in the folded state have the same format.
• the edge length 232 of the handkerchief 206 again corresponds to% of the edge length 230.
• the handkerchief 200 has twelve folded layers in the folded state.
• the handkerchief 206 is only nine fold layers thick.
• the Ta shown in FIGS. 7, 8, 9 Shawls are advantageously folded by the method set forth above and thus stacked into packets for packaging.

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• Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

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ID=44936220

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Citations (8)

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• 2011
  • 2011-10-17 CN CN201180059619.4A patent/CN103282295B/zh not_active Expired - Fee Related
  • 2011-10-17 EP EP20110781743 patent/EP2627594B1/de not_active Not-in-force
  • 2011-10-17 DE DE102011116003.9A patent/DE102011116003B4/de not_active Expired - Fee Related
  • 2011-10-17 WO PCT/EP2011/005207 patent/WO2012048904A1/de active Application Filing

Patent Citations (8)

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