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
  • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
  • B65H5/30—Opening devices for folded sheets or signatures
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H3/00—Separating articles from piles
  • B65H3/24—Separating articles from piles by pushers engaging the edges of the articles
• • 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
  • B65H33/06—Forming counted batches in delivery pile or stream of articles by displacing articles to define batches
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H47/00—Unfolding thin limp material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2301/00—Handling processes for sheets or webs
  • B65H2301/40—Type of handling process
  • B65H2301/42—Piling, depiling, handling piles
  • B65H2301/422—Handling piles, sets or stacks of articles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2301/00—Handling processes for sheets or webs
  • B65H2301/50—Auxiliary process performed during handling process
  • B65H2301/51—Modifying a characteristic of handled material
  • B65H2301/513—Modifying electric properties
  • B65H2301/5132—Bringing electrostatic charge
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2301/00—Handling processes for sheets or webs
  • B65H2301/50—Auxiliary process performed during handling process
  • B65H2301/51—Modifying a characteristic of handled material
  • B65H2301/513—Modifying electric properties
  • B65H2301/5133—Removing electrostatic charge
• • 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
  • B65H2701/1932—Signatures, folded printed matter, newspapers or parts thereof and books

Definitions

• the invention relates to a method according to the preamble of the independent claim.
• the method serves to separate a number of at least partially superimposed, flat objects at a predetermined location.
• the flat objects consist, for example, of paper, cardboard, tissue, felt or plastic.
• the number of flat objects to be separated is, for example, a multi-page printed product made of paper, plastic or cardboard that can be opened at a specific point, or it is a stack or a scaled formation of printed products or flat objects made of cardboard, fabric, felt or Plastic, from which stack or scaled formation, for example, by separating a certain number of objects to be removed at a certain point.
• separating element for example a separating wedge
• the patent specification CH-440339 describes a method in which, with a displacement force which has a component parallel to the main surfaces of the objects, two objects lying directly one on top of the other are displaced against one another in a number of superimposed, flat objects, without any action individual narrow sides or edges of the objects. So that the displacement can be carried out in a targeted manner between the predetermined two objects (predetermined separation point), while the other objects remain essentially not displaced relative to one another, the liability between the two objects to be displaced relative to one another is reduced compared to the liability between the other objects, in that the corresponding coefficient of friction is reduced by appropriate measures.
• the method according to the invention is based on the knowledge that the adhesion between superimposed, flat objects can be increased by static charging of their surfaces.
• static charge is now generated on the superimposed, flat objects by passing them through an electrical direct voltage field that is oriented essentially perpendicular to the main surfaces of the objects. Due to the effect of the field, dipoles are aligned or charges shifted across the main surfaces and concentrate on the two surfaces of each of the objects, positive or negative charges. These charges create electrical attraction forces between the surfaces of various objects, which increase mutual liability.
• FIG. 1 shows a diagram of the successive steps of the method according to the invention
• FIG. 2 shows the method according to the invention using the example of multi-page printed products which can be opened at a specific point;
• Figures 3 and 4 two examples of printed products equipped with a plurality of predetermined opening locations.
• FIG. 1 schematically shows the successive steps of the method according to the invention using the example of a stack 1 consisting of five superimposed, flat objects 2, the upper two objects being to be displaced relative to the lower three objects in order to separate the stack.
• the predetermined separation point is therefore between the upper surface of the third object and the lower surface of the fourth object in the stack 1.
• At least one of the surfaces involved in the separation point is treated, for example coated, with an antistatic agent 3.
• Antistatic agents are known in particular from the plastics industry. These are, for example, conductive particles (e.g. soot, carbon fibers, nickel-coated mica, steel fibers or aluminum platelets) that are finely distributed in a matrix, which usually consists of a plastic, or ionic compounds (e.g. quaternary ammonium salts) , surface-active substances (eg glycol esters, glycol ethers or esters and salts of fatty acids) or hygroscopic substances (eg glycerin or polyglycol) which are used as such or in the form of aqueous or alcoholic solutions.
• conductive particles e.g. soot, carbon fibers, nickel-coated mica, steel fibers or aluminum platelets
• ionic compounds e.g. quaternary ammonium salts
• surface-active substances eg glycol esters, glycol ethers or esters and salts of fatty acids
• hygroscopic substances eg gly
• the treatment with the antistatic agent can be for a liquid agent or a molten agent a spraying or application with a roller, for a solid agent a direct rubbing or a brushing on the surface to be treated.
• a liquid agent or a molten agent a spraying or application with a roller
• a solid agent a direct rubbing or a brushing on the surface to be treated.
• the conductive pigment Minatec® offered by Merck in Darmstadt is also suitable for this.
• antistatic agents reduces the surface resistance of the treated surfaces to usually 10 10 to 10 8 ⁇ .
• the surface treated with the antistatic agent 3 forms one of the surfaces to be shifted against one another. It is of course also possible and also advantageous in certain applications to treat not only one surface of the separation point but both surfaces involved in the separation point with an antistatic agent.
• the stack 1 is then exposed to a DC field, the field lines of which are oriented essentially perpendicular to the main surfaces of the objects.
• the stack is carried out between two electrodes 10, for example between two plates or rods between which there is a constant potential difference. Due to the effect of the field, dipoles are aligned or charges shifted in the flat objects in such a way that a potential difference or a static charge builds up between the two surfaces of an object, as is shown schematically in FIG. and minus sign is shown. These charges are on superimposed surfaces of adjacent objects opposite, which creates electrical attraction forces between the objects.
• the entire surface of an object 2 is treated with the antistatic agent and the entire stack or the entire base area of the stack is exposed to the DC voltage field.
• the antistatic agent can also be applied to a surface only in regions. It is also possible to electrostatically charge only a part of the stack. In this case, however, an electrostatic charging of those surface areas that coincide with the treated surface area is necessary, whereby the charged area can also be smaller than the treated area.
• Devices for generating static charges on flat objects are known from the paper processing industry. They are used, for example, to prevent mutual displacement of loosely stacked paper webs or loosely stacked sheets.
• An example of such a device is the ion nailer (ion shooter) from Spengler Electronics AG, Biel-Benken (Switzerland).
• the voltage difference between the two electrodes 10 of such a device is of the order of 10 kV.
• a displacement force (arrow 11), which acts for example on the stack surface and has a component parallel to the main surfaces of the objects, is applied to the stack 1.
• this displacement force 11 the two surfaces in the stack that are least adherent to one another are displaced relative to one another, even if the force does not act precisely on the separation point, but rather, for example, on the stack surface.
• FIG. 2 shows schematically, as an exemplary application of the method according to the invention, the production of a multi-page printed product 20, for example a magazine or brochure, and a targeted opening of the printed product 20, for example in order to insert an insert at a predetermined point.
• the printed product is assembled and stapled, for example, by collecting pre-folded sheets in a collecting and stapling drum, as is shown very schematically in the top line of FIG.
• the printed product can also be trimmed on three sides.
• a corner area 22 is treated with an antistatic agent, for example by spraying from a spray head 21 on an inner side in the finished printed product.
• FIGS. 3 and 4 also show multi-page printed products 30 with a bound, stapled or glued back 31, which printed products have more than one predetermined separation point.
• these separation points are realized by pages which in some areas carry an antistatic agent.
• the areas of the various separating points are advantageously non-overlapping corner areas 32 and 33 and / or areas 34 and 35 bordering on edges. With a deliberately acting displacement force that acts on the outside of the product in one of these areas 32 to 35, one of the areas The charging of the objects only activated one of the separation points.
• the static charging of flat objects generated by the DC voltage field dissipates in a relatively short time. For this reason, it is important to let the displacement force work immediately after charging.
• the effect of the antistatic agent remains for a very long time, so that the period between the application of the agent and the charging can be as long as desired, and that in particular at any time after recharging, the objects again in the manner described and at the same predetermined separation point can be pushed.

Landscapes

• Mechanical Engineering (AREA)
• Engineering & Computer Science (AREA)
• Elimination Of Static Electricity (AREA)
• Laminated Bodies (AREA)
• Mechanical Treatment Of Semiconductor (AREA)
• Control And Other Processes For Unpacking Of Materials (AREA)
• Sheets, Magazines, And Separation Thereof (AREA)
• Container, Conveyance, Adherence, Positioning, Of Wafer (AREA)
• Application Of Or Painting With Fluid Materials (AREA)
• Crystals, And After-Treatments Of Crystals (AREA)
• Apparatus For Radiation Diagnosis (AREA)
• Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
• Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
• Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
• Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
• Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
• Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
• Separation By Low-Temperature Treatments (AREA)

Priority Applications (11)

Applications Claiming Priority (2)

Publications (1)

Family

ID=4197551

Family Applications (1)

Country Status (14)

Families Citing this family (2)

Citations (2)

Family Cites Families (1)

• 1998
  • 1998-04-07 DE DE59801001T patent/DE59801001D1/de not_active Expired - Lifetime
  • 1998-04-07 JP JP54334298A patent/JP2001519750A/ja active Pending
  • 1998-04-07 CA CA002285981A patent/CA2285981C/en not_active Expired - Fee Related
  • 1998-04-07 CZ CZ0346699A patent/CZ298389B6/cs not_active IP Right Cessation
  • 1998-04-07 WO PCT/CH1998/000129 patent/WO1998046508A1/de active IP Right Grant
  • 1998-04-07 ES ES98910567T patent/ES2162425T3/es not_active Expired - Lifetime
  • 1998-04-07 IL IL13213298A patent/IL132132A/en not_active IP Right Cessation
  • 1998-04-07 EP EP98910567A patent/EP0975540B1/de not_active Expired - Lifetime
  • 1998-04-07 AU AU64932/98A patent/AU727498B2/en not_active Ceased
  • 1998-04-07 RU RU99121668/12A patent/RU2203189C2/ru active
  • 1998-04-07 PL PL98336227A patent/PL336227A1/xx unknown
  • 1998-04-07 DK DK98910567T patent/DK0975540T3/da not_active Application Discontinuation
  • 1998-04-07 AT AT98910567T patent/ATE202998T1/de not_active IP Right Cessation
• 1999
  • 1999-10-14 NO NO19994999A patent/NO313822B1/no not_active IP Right Cessation

Patent Citations (2)

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