GB2103190A - Sheet folding apparatus - Google Patents
Sheet folding apparatus Download PDFInfo
- Publication number
- GB2103190A GB2103190A GB08221884A GB8221884A GB2103190A GB 2103190 A GB2103190 A GB 2103190A GB 08221884 A GB08221884 A GB 08221884A GB 8221884 A GB8221884 A GB 8221884A GB 2103190 A GB2103190 A GB 2103190A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sheet
- folding
- roll
- sheets
- path
- 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.)
- Granted
Links
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
- B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
- B65H45/14—Buckling folders
- B65H45/142—Pocket-type folders
- B65H45/144—Pockets or stops 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
- B65H45/14—Buckling folders
- B65H45/142—Pocket-type folders
- B65H45/148—Pocket-type folders diverters therefor
Landscapes
- Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
Abstract
Sheet folding apparatus for four- break sheet foling comprises means for transporting a sheet 1 between one or other of two rolls 2 or 3, a folding pocket 6 selectively locatable to receive sheets passed between either pair of rolls, a roll 4, for producing folds in such sheets, and adjustable guides 7, 8 for guiding the folded sheets. <IMAGE>
Description
SPECIFICATION
Sheet folding apparatus
The present invention relates to sheet folding apparatus, and has particular reference to a variable pocket folding mechanism for preferably four-break folding in a folding machine, in which sheets are optionally provided in the folding mechanism with International or English fourbreak fold.
In folding machines of known construction, pocket folding mechanisms are provided in most cases for forming the third and fourth fold breaks, it being possible by adjustment of sheet deflectors, i.e. by free choice of the folding pockets to be used, to produce fold breaks in any direction. Such a folding mechanism construction is described in, for example, DE-AS 1 611 395 for forming the second, third and fourth fold breaks.
This optional use of upwardly or downwardly directed folding pockets is not, however, restricted to two-sheet folders, but is generally encountered. The optional utilization of the folding pockets in the folding roller assembly chosen in the afore-mentioned example is still not adequate, however, for realizing English and
International four-break folding of thick paper. For this purpose, a further folding mechanism having a folding pocket disposed to point downwards at an obtuse angle to the sheet run is required, together with all the additional cost of procurement, maintenance, storage and increased setting-up times resulting from changing over the folding mechanisms.With the folding mechanism construction described in DD-AS 1 611 395, appropriate quality of processing without additional perforation of the sheets is possible, particularly at the fourth folding mechanism, only in the case of thin paper. When the lower folding pocket is used, squeeze creases occur in paper exceeding 70 gr/m2, as after entering the feed rollers the sheet must be introduced at an acute angle into the folding pocket. In the processing of paper from 90 gr/m2 upwards, the use of a folding mechanism as described in DD-AS 1 611 395 is only possible with compromises in regard to the quality of folding, since as the folded sheet leaves the folding mechanism squeeze creases occur when the upper folding pocket is used.
There is accordingly a need for apparatus capable of producing, for example, English and
International four-break folds with minimum expenditure on procurement, maintenance, storage and installation for the folding mechanism, and with avoidance of lengthy setting-up times resulting from changing over of folding mechanisms. For preference, sheets should not be fed into folding pockets at an acute angle, regardless of their scheme-imposed arrangement.
According to the present invention there is provided sheet folding apparatus comprising transport means for sheet transport along a selectable one of a first path between two rolls and a second path between two rolls, sheet feed means for feeding sheets for transport along a selected one of the paths, a sheet receiving pocket selectably positionable in association with the selected one of the paths to receive sheets transported along that path, fold roll means associated with a roll of each path to produce folds in sheets transported along the selected one of the paths and received by the pocket, and adjustable guide means positionable to guide the folded sheets.
In a preferred embodiment, for feeding the sheets to the folding pocket, two rolls pairs and their arrangement are so provided that the forming of the fold can take place, as desired, according to the requirements relating to the desired folding scheme, either downwards or upwards. The folding pocket can accordingly be used in a first or a second position and sheet defiectors can be swung in or out respectively. To form the fold, one roll of the roll pair co-operates on each occasion for the purpose of feeding the sheets, with a folding roll. An especially advantageous construction of the folding mechanism head is achieved if the two roll pairs forfeeding the sheets constitute a total of three rolls, of which one is a constituent of both roll pairs, the direction of the rolls being changeable according to the sheet run to be selected.For the optional feeding of the sheets to one of the two roll pairs, a pivotally mounted feed table may be provided.
Depending upon the position of this feed table, the sheets are fed to one of the two roll pairs present, are transported onwards till they meet the folding pocket, are folded either in the downward direction or in the upward direction by folding roll in engagement with one roll pair and, after deflection by the swung-in sheet deflector, are fed by conveying rolls to a delivery device. When the sheets are fed to the upper roll pair in the fourth folding mechanism, the folded sheets are delivered as English four-break fold, and when they are fed to the lower roll pair they are delivered as International four-break fold. In both cases the folding pocket extends at an obtuse angle with the plane of sheet run, so that forced guidance of the sheet at an acute angle is avoided. The folding mechanism of the said embodiment can therefore be used for all types of paper without restrictions.
An embodiment of the present invention will now be more particularly described by way of example with reference to the accompanying drawings, in which:
Fig. 1 is a schematic elevation of folding apparatus according to the said embodiment, the apparatus having a sheet run for the production of
English four-break fold; and
Fig. 2 is a view similar to Fig. 1 but with the apparatus having a sheet run for the production of
International four-break fold.
Referring now the drawings, there is shown a fourth folding mechanism in which, in Fig. 1, sheets 1 can be fed to a roll pair 2 via a pivotaliy mounted feed table 5 and transported until they meet a folding pocket 6 in position I. The forming of a fold in each sheet takes place in a downward direction between a folding roll 4 and one roll of the roll pair 2 in engagement therewith. A sheet deflector 7 pivoted into an operative position, deflects the folded sheet towards conveying rolls 9 to the delivery device of the folding machine. In this position of the feed table 5 and of the folding pocket 6 in the fourth folding mechanism, the delivery is effected as English four-break fold.
In Fig. 2, the sheets 1 are fed to a roll pair 3 via the pivotally mounted feed table 5 and are transported until they meet the folding pocket 6 in position II. The forming of the fold takes place in an upward direction between the folding roll 4 and one roll of the roll pair 3 in engagement therewith. A sheet deflector 8, pivoted into an operative position, deflects the folded sheet towards conveying rolls 10 to the delivery device of the folding machine. In this position of the feed table 5 and of the folding pocket 6 changed over into position II in the fourth folding machanism, sheet delivery takes place as International fourbreak fold.
The angle a, which influences the quality of fold, i.e. the angle at which the sheet is fed to the folding pocket, is in both positions of pocket 6 greater than 900. Thus the cause of the occurrence of squeeze creases is eliminated and a universally applicable, variable folding mechanism is made available.
Claims (4)
- ClaimsSheet folding apparatus comprising transport means for sheet transport along a selectable one of a first path between two rolls and a second path between two rolls, sheet feed means for feeding sheets for transport along a selected one of the paths, a sheet receiving pocket selectably positionable in association with the selected one of the paths to receive sheets transported along that path, fold roll means associated with a roll of each path to produce folds in sheets transported along the selected one of the paths and received by the pocket, and adjustable guide means positionable to guide the folded sheets.
- 2. Apparatus as claimed in claim 1, wherein the first path is defined between a first and second roll and the second path between the second and a third roll, each roll being drivable to rotate in either direction.
- 3. Apparatus as claimed in either claim 1 or claim 2, the feed means comprising a pivotable feed table.
- 4. Sheet folding apparatus substantially as hereinbefore described with reference to the accompanying drawings.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DD23230781A DD200518A1 (en) | 1981-08-03 | 1981-08-03 | VARIABLE POCKET FOLDER FOR FOUR BREAKFAST |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2103190A true GB2103190A (en) | 1983-02-16 |
GB2103190B GB2103190B (en) | 1985-05-15 |
Family
ID=5532749
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08221884A Expired GB2103190B (en) | 1981-08-03 | 1982-07-29 | Sheet folding apparatus |
Country Status (3)
Country | Link |
---|---|
DD (1) | DD200518A1 (en) |
DE (1) | DE3221525A1 (en) |
GB (1) | GB2103190B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006028123A1 (en) * | 2006-06-15 | 2007-12-20 | JÜRG PAUL Haller | Device for manipulating flat piece goods, such as sheets of paper, plastic, cardboard and the like |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE524718C (en) * | 1931-05-11 | Kleim & Ungerer | Sheet folding machine | |
GB264607A (en) * | 1925-10-31 | 1927-01-27 | Robert John Waterworth | Improvements in and relating to machines for folding paper and similar materials |
DE478197C (en) * | 1926-06-09 | 1929-06-19 | Georg Spiess | Device for folding sheets |
US2230168A (en) * | 1936-10-30 | 1941-01-28 | Spiess Georg | Buckling folding machine |
DE1611395B2 (en) * | 1966-10-06 | 1973-06-14 | VEB Polygraph Leipzig, Kombinat fur polygraphische Maschinen und Ausrustun gen, χ 7050 Leipzig | DOUBLE SHEET FOLDING MACHINE |
DE2152078C3 (en) * | 1970-10-22 | 1973-11-08 | Vittorio S. Mauro Torinese Turin Garrone (Italien) | Automatic folding machine |
-
1981
- 1981-08-03 DD DD23230781A patent/DD200518A1/en not_active IP Right Cessation
-
1982
- 1982-06-08 DE DE19823221525 patent/DE3221525A1/en active Pending
- 1982-07-29 GB GB08221884A patent/GB2103190B/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB2103190B (en) | 1985-05-15 |
DE3221525A1 (en) | 1983-02-24 |
DD200518A1 (en) | 1983-05-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |