EP0336610A1 - Vervielfältigungsverfahren und blattartiges Material zur Verwendung in einem solchen Verfahren - Google Patents

Vervielfältigungsverfahren und blattartiges Material zur Verwendung in einem solchen Verfahren Download PDF

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Publication number
EP0336610A1
EP0336610A1 EP89302899A EP89302899A EP0336610A1 EP 0336610 A1 EP0336610 A1 EP 0336610A1 EP 89302899 A EP89302899 A EP 89302899A EP 89302899 A EP89302899 A EP 89302899A EP 0336610 A1 EP0336610 A1 EP 0336610A1
Authority
EP
European Patent Office
Prior art keywords
sheets
face
pair
stack
edge
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.)
Withdrawn
Application number
EP89302899A
Other languages
English (en)
French (fr)
Inventor
Leonard Noel Bevan
Colin Reginald Moore
Victor George Atkinson
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.)
Carrs Paper Ltd
Original Assignee
Carrs Paper Ltd
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
Priority claimed from GB888807598A external-priority patent/GB8807598D0/en
Application filed by Carrs Paper Ltd filed Critical Carrs Paper Ltd
Priority to EP89302899A priority Critical patent/EP0336610A1/de
Publication of EP0336610A1 publication Critical patent/EP0336610A1/de
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G13/00—Electrographic processes using a charge pattern
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6588—Apparatus which relate to the handling of copy material characterised by the copy material, e.g. postcards, large copies, multi-layered materials, coloured sheet material
    • G03G15/6594—Apparatus which relate to the handling of copy material characterised by the copy material, e.g. postcards, large copies, multi-layered materials, coloured sheet material characterised by the format or the thickness, e.g. endless forms
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00367—The feeding path segment where particular handling of the copy medium occurs, segments being adjacent and non-overlapping. Each segment is identified by the most downstream point in the segment, so that for instance the segment labelled "Fixing device" is referring to the path between the "Transfer device" and the "Fixing device"
    • G03G2215/00371—General use over the entire feeding path
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00367—The feeding path segment where particular handling of the copy medium occurs, segments being adjacent and non-overlapping. Each segment is identified by the most downstream point in the segment, so that for instance the segment labelled "Fixing device" is referring to the path between the "Transfer device" and the "Fixing device"
    • G03G2215/00417—Post-fixing device
    • G03G2215/00426—Post-treatment device adding qualities to the copy medium product
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00443—Copy medium
    • G03G2215/00451—Paper
    • G03G2215/00476—Non-standard property
    • G03G2215/00485—Thin
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00443—Copy medium
    • G03G2215/00523—Other special types, e.g. tabbed
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00789—Adding properties or qualities to the copy medium
    • G03G2215/00814—Cutter

Definitions

  • This invention relates to reprographic processes such as printing, photocopying and the like processes and sheet material, such as paper, for use in said processes.
  • printing is used herein to encompass various methods of forming an image on sheets of paper by both conventional printing techniques which involve transferring an ink image mechanically from a carrier which strikes the paper forceably to imprint the ink on the paper and non-impact methods.
  • non-impact printing processes include on the one hand thermal and electrostatic or electro-­sensitive imaging on appropriately sensitised papers, and on the other hand ink jet or toner deposition normally on plain paper, the most common toner based technology involving electrostatic transfer of toner to the paper followed by fusion of the deposited toner to form a permanent image. Similar techniques are employed in photocopying and other like reprographic processes, and the term “reprographic” is also intended to include such other processes.
  • the apparatus currently employed for carrying out such reprographic processes usually is capable of operating at high speed, taking individual sheets of paper from a supply stack, conveying them to and through a printing station and discharging the printed sheets to form an output stack or collating the printed sheets with others.
  • paper which is entirely satisfactory for normal office use as typing paper for example may not be recommendable for use in photocopiers.
  • sheet paper which is usable in conventional printing processes may not be recommendable for non-impact printing processes.
  • photocopying and non-impact printing usually has to be carried out on a stiffer grade paper than can be used for typing or conventional printing, the former processes requiring paper which is heavier and stiffer than that required for the latter processes.
  • British patent specification No. 1145833 proposes the use in a copying machine of a duplex sheet comprising a relatively thick carrier sheet and a relatively thin copy sheet which are secured together in face-to-face relation, e.g. by gluing opposite end portions together.
  • the duplex sheet is passed through a copying machine to make a copy on the light, copy sheet which is then separated from the carrier sheet, the latter being discarded. Whilst such a duplex sheet may be satisfactory for low volume copying, it is too expensive and wasteful for high volume printing operations.
  • the present invention seeks to overcome such problems in a surprisingly simple and effective manner.
  • Images may be formed simultaneously on both exposed faces of the pair.
  • the pair may be inverted if necessary and then passed again through the same, or another, reprographic apparatus to form an image on the remaining exposed face of the pair before the two sheets are separated.
  • the sheets are preferably formed into pairs in which two sheets are connected together at at least one edge and thereby held in the required face-to-face relation.
  • the two sheets of each pair are preferably identical to one another, and where the opposed faces of the material from one another, for example in finish or coating, the two sheets in the pair should be arranged with like faces in contact.
  • the two sheets of each pair are formed integrally with one another and folded to form two leaves connected at one edge and in face-to-face relation for separation after completion of the reprographic process.
  • a row of perforations such as micro-perforations, may be formed along the fold line.
  • two separate sheets may be secured together adhesively or otherwise along at least one edge. In either case the pair of sheets may be passed through the reprographic apparatus with the connected edge leading.
  • Separation of the two sheets after passage through the reprographic apparatus may be by tearing along any line of perforations provided, or simply by pulling apart a line of adhesive, but preferably the material is cut. More particularly, the material may be cut before the sheets are unfolded so as to remove a narrow marginal strip incorporating the connected edge.
  • the two sheets may be connected together along only one edge, as by folding or by means of adhesive, in some cases it may be desirable to secure them together for example adhesively at one or more further edges. Thus, they may be connected together at two opposed edges and in some cases at all four edges.
  • the two sheets of each pair are formed integrally and folded into the required face-to-face relation, the two sheets in each pair will of course be identical, and in particular both of the same weight and stiffness. Moreover, where the two sheets are initially separate and are connected to one another they will also usually be identical so that after completion of the reprographic process a single product is produced.
  • reprographic apparatus requires paper having a weight of at least 80 grams per square metre; by using a double sheet the weight can be reduced to 60 or even 50 grams per square meter with consequent cost savings on paper usage and transportation.
  • a heavier but softer paper not having the required degree of stiffness as a single sheet may be utilised in the form of a double sheet in accordance with the invention, especially where the two sheets are integrally connected by folding or additionally stiffened by being connected at more than one edge.
  • the invention further resides in a stack of sheet material prepared for use in the above method, the stack comprising a plurality of sheets, all of like kind, wherein the sheets are connected together in pairs arranged in face-to-­ face relation, the two sheets of each pair being connected together at at least one edge, whilst the neighbouring sheets of superposed pairs in the stack are not connected to one another so that each pair can be removed successively from the stack.
  • the invention firstly provides a stack 10 of double sheets 20 of paper each comprising two leaves 21 and 22 connected together at one edge 23 in the illustrated case by an integral fold optionally with a line of perforations on the fold line.
  • the stack 10 may, of course, be boxed or packaged, and subsequently transported, handled and sold in precisely the same manner as conventional supplies of single sheets of paper.
  • Perforations on the folded edge 23 not only facilitate folding and subsequent separation of the leaves 21 and 22 by tearing if required, but also allow air to escape from between the leaves as they are folded together so as to reduce the tendency for a bulge to form at the folded edge.
  • the line of perforations is desirably provided even where, as is preferred, the two leaves are subsequently to be separated by cutting away the folded edge portion.
  • the double sheets 20 are folded so as to bring the back surfaces 21 a , 22 a together, leaving the front surfaces 21 b , 22 b exposed for use.
  • adhesive may additionally be applied along the edge 24 opposite joined edge 23 to increase the stiffness of the double sheet, and if appropriate along one or both of the end edges 25.
  • stacks 10 of double sheets 20 comprising leaves 21, 22 connected together at least along one set of edges 23 may then be printed on the exposed faces 21 b , 22 b by the method as illustrated in Figure 3. It will be appreciated that in the stack 10, successive double sheets 20 are not in any way connected to one another so that each pair of leaves can freely be removed from the stack in the same manner as a single sheet of paper in a conventional stack.
  • each successive double sheet 20 is taken from the stack 10 and passed through the reprographic (e.g. printing) apparatus, the two leaves remaining in face-to-face relation, with the connected edge 23 preferably leading.
  • the required imaging operation is performed on one exposed face of the double sheet.
  • the double sheet after one pass 20 a may be inverted 20 b by any suitable mechanism and passed through the apparatus for a second time for completion of the reprographic operation on the other exposed face of the double sheet. This may be achieved either by re-forming the double of sheets into a stack after their first pass through the apparatus and then returning the new stack, in inverted condition, to the input of the apparatus, or by inverting and returning each double sheet separately as it emerges from the first pass.
  • the two sheets of each pair are separated, preferably by cutting off the folded edge portion 23 by means of a suitable cutter 25, after which the sheets are formed into respective stacks 30, 31.
  • a suitable cutter 25 For the pairs of sheets have been passed twice through the same apparatus and therefore bear the same image, one of the two stacks can then be inverted, so that the image bearing faces of both stacks face the same way, and the two stacks placed together.
  • they instead of passing the double sheets a second time through the same apparatus, they could alternatively be fed to a second reprographic apparatus to complete the operation.
  • the reprographic apparatus used can be entirely conventional and includes standard office photocopiers, high speed commercial non-impact printing machines and normal printing presses. More significantly, the apparatus need not be modified in any way, but by virtue of the method of operation using double sheets of paper, such unmodified apparatus can satisfactorily handle paper of a kind which would not meet the normal requirements of the apparatus with regard to such factors as weight or stiffness if presented to the apparatus in single sheets. Using the sheets in connected pairs effectively increases the weight and stiffness of the paper and as each sheet is utilised to receive an image a significant saving in materials anc costs can be achieved. In the case of relatively high grade paper, a lighter weight paper can be employed; alternatively a lower grade of paper having less than the required stiffness can be employed.
  • This technique is particularly applicable to printing onto carbonless copy paper of the type employing CB coatings since printing is normally required only on the CF or uncoated side, and it is the CB coating which is particularly liable to cause contamination of electrostatic printing processes.
  • the CB coatings By arranging the CB coatings in face-to-face relation, any damage to the micro-capsules containing the colour-forming chemicals, during passage of the paper through the printing apparatus will be confined between the two sheets of paper so that contamination of the working parts of the apparatus can largely be eliminated.
EP89302899A 1988-03-30 1989-03-23 Vervielfältigungsverfahren und blattartiges Material zur Verwendung in einem solchen Verfahren Withdrawn EP0336610A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP89302899A EP0336610A1 (de) 1988-03-30 1989-03-23 Vervielfältigungsverfahren und blattartiges Material zur Verwendung in einem solchen Verfahren

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB8807598 1988-03-30
GB888807598A GB8807598D0 (en) 1988-03-30 1988-03-30 Paper for use in photocopying &c reprographic processes
EP89302899A EP0336610A1 (de) 1988-03-30 1989-03-23 Vervielfältigungsverfahren und blattartiges Material zur Verwendung in einem solchen Verfahren

Publications (1)

Publication Number Publication Date
EP0336610A1 true EP0336610A1 (de) 1989-10-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP89302899A Withdrawn EP0336610A1 (de) 1988-03-30 1989-03-23 Vervielfältigungsverfahren und blattartiges Material zur Verwendung in einem solchen Verfahren

Country Status (1)

Country Link
EP (1) EP0336610A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004042153B3 (de) * 2004-08-31 2006-05-04 OCé PRINTING SYSTEMS GMBH Verfahren zum Erzeugen von Druckbildern auf einem Trägermaterial mit Hilfe eines Druckers oder Kopierers

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1145833A (en) * 1965-06-01 1969-03-19 Rank Xerox Ltd Improvements in paper sheets
GB1534844A (en) * 1976-07-02 1978-12-06 Moore Business Forms Ltd Business forms

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1145833A (en) * 1965-06-01 1969-03-19 Rank Xerox Ltd Improvements in paper sheets
GB1534844A (en) * 1976-07-02 1978-12-06 Moore Business Forms Ltd Business forms

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
RESEARCH DISCLOSURE, no. 253, May 1985, pages 252-253, disclosure no. 25345, Emsworth, Hampshire, GB; "Methods for using a copying apparatus" *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004042153B3 (de) * 2004-08-31 2006-05-04 OCé PRINTING SYSTEMS GMBH Verfahren zum Erzeugen von Druckbildern auf einem Trägermaterial mit Hilfe eines Druckers oder Kopierers

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