US1898794A - Cross folding machine - Google Patents

Cross folding machine Download PDF

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US1898794A
US1898794A US588861A US58886132A US1898794A US 1898794 A US1898794 A US 1898794A US 588861 A US588861 A US 588861A US 58886132 A US58886132 A US 58886132A US 1898794 A US1898794 A US 1898794A
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folder
feed
sheet
folding
rollers
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US588861A
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Spiess Georg
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Spiess Georg
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00Folding thin material
    • B65H45/12Folding articles or webs with application of pressure to define or form crease lines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00Folding thin material
    • B65H45/12Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/14Buckling folders
    • B65H45/142Pocket-type folders

Description

Feb. 21, 1933. c. sPlEss CROSS FOLDING MACHINE Filed Jan. 28 1932 Patented m. 21, 1933 PATENT OFFICE GEOBG SPIESS, OI LEIPZIG, exam? caoss ronnme mom Application fled January 26, 1982, Serial No. 588,881, and in Germany January 31, 1981.
I have filed an application in Germany on the 31st of January, 1931.
In the known cross folding machines of the general type described in my prior U. S. Patent No. 1,725,837, in which the sheet is checked by impact with a stop and 1s buckled or bent at the folding position by the action of feed rollers, it is necessary when feeding the sheets separately and con- 19 secutively, to let the feed device of the corner feed table and at least the rollers of the first cross folding apparatus, run at a higher speed than the folding rollers of the folding apparatus arranged anterior to the corner feed table, in order that a sheet moved upon the corner feed table towards the cross folding apparatus should leave the corner feed table entirely or substantially entirely before the following sheet reaches, with its leading edge, the corner feed table. In the known arrangements it is essential that contact of a sheet reaching the corner feed table with the sheet previously put upon the corner feed table be avoided, so as not to incur the risk of the second sheet being pushed into the open end or folding mouth of the preceding sheet.
A high feed speed or end speed of the corner feed table is, however, detrimental go to a satisfactory registration of the sheets. It is most important that the folding speed in the first cross folder should not exceed a certain magnitude as otherwise the accuracy of folding deteriorates excessively even :5 though the folding line of the sheet is preshaped before the folding operation proper.
If in the known cross folding machmes m which the sheet is bent or buckled before the actual folding operation, the foldin speed 0 of the first cross folder is kept su ciently low to ensure a satisfactory folding, the maximum capacity of the first folder can not be fully utilized, as the sheets cannot be fed so as to follow immediately upon each other but must be fed intermittently or with an interval, or the speed of the first folder must be reduced below the normal ,degree. I
One of the objects of the present invention is to avoid these drawbacks. The invention consists substantially in conve the folded sheets delivered by the first dl d er 1n such a manner to the following corner feed table that the sheets whilst moving in the direction towards the following cross folder overlap each other. This partial superlmposing of the folded sheets may be effected by any suitable means, for instance by the PI'OVlSiOIl of suitable pushin delivery rollers and guide members provi ed at the delivery end of the first folder. When applymg the invention to multiple fold machines, the superimposing of the fold sheets may, of course, be applied at every corner feed table, that is, anterior to every cross folder. In a preferred construction according to the invention the folded sheets are conveyed by pushing delivery rollers to a conveyor table arranged at a somewhat lower level so w as to provide for a slight drop at the point at which the folded sheets are transferred from the delivery and of one folder to the feed end of the following folder, and suitable guide tongues are provided at this point in such a manner as to insure that the leading edge of a folded sheet issuing from the pushing delivery rollers is moved over the open end of the previous folded sheet which is being conveyed transversely to the corner folder. These guide tongues assist in 0b taining the uired overlapping and the proper positiomng of the folded sheets upon the corner table leading to the followlng folder. It is preferred to provide the feeding means, for instance, feed rollers, of the corner feed table with counter rollers preferably in the form of rotary brushes the pressure of which may be controlled and also a guide plate under which the folded sheet,
after having been dro ped from the guide tongues, passes. The olded sheet performs, whilst dropping upon the preceding sheet, a movement parallel to itself and covers a very considerabie portion of the preceding sheet. Owing to the force of inertia imparted to a folded sheet by the pushing delivery rollers, and also owing to the action of the brush rollers, a folded sheet whilst being conveyed m9 in a transverse direction towards the following cross folder is moved simultaneously against a registering rule, and simultaneously the open end of the folded sheet is I closed by the brush rollers, so that the guide tongues are always located at a considerably hig er level than the upper edge of the open end of the previously deposite folded sheet. This arrangement efl'ectivel prevents a 1 folded sheet which is being eposited upon a corner feed table from accidentally entering the open end of a previously deposited sheet. The invention enables the conveying speed of a corner feed table and the folding speed of the cross folder fed by the table to be maintained equal to or even less than the speed of the preceding folder, and this advantage is attained whilst maintaining an uninterrupted feed of the sheets into the folding machine and employin the most favourable speed within the rst folder. Another advantage of the invention resides in an improved registration of the sheets and in slowing down the actual foldin operation within the second folder, whic results in a much more accurate and satisfactory folding action.
The accompanying drawing shows diagrammatically one construction embodying the features of the invention, all parts unnecessaryefor the understanding of the invention ing omitted.
Fig. 1 shows a simple cross folding machine in elevation said machine being suitable for effecting two parallel folds and one cross fold.
Fig. 2 is a top view corresponding to Fig.
Fig. 3 shows in detail the action and arrangement of the drop stage between the parallel folder and the corner feed table, 7
Fig. 4 shows in detail the arrangement of the adjustable brush rollers of the corner feed table.
The sheets are conveyed continuously in known manner by means of a feed tablel mounted in a frame 2 and provided with a lateral registering rule 100 to a pair of rollers 4, 7 driven in known .manner from a shaft 3, and are fed by the rollers 4, 7 into an upper folding table or pocket 8. In this pocket the leading edge of the sheets is checked by a stop 80 so that the sheet contained in the table or pocket owing to its being pushed from behind by the roller pair 4, 7, is buckled or bent at the forward end of the folding pocket 8. The buckled or bent portion is gripped by the roller pair 4, 5 and the sheet is then folded and moved by the rollers 4, 5 into a lower folding pocket 9, in which the leading edge of the sheet is checked by a stop 90. Owing to the rollers 4, 5 continuing to push the sheet, the sheet is again buckled or bent at the 65 forward end of the second folding pocket 9 and enters the rollers 5, 6, which grip the sheet and fold same a second time parallel to the first fold. After being folded by the rollers 5, 6, the sheets are conveyed to a corner feed table 16 by deliver rollers 10, 11 over a delivery table 12 and y a further delivery roller 14 which cooperates with guide rollers 15. Upon the delivery table 12 are provided guide tongues 13 which pass throug the roller pair 14 and 15 and extend approximately to the height of the lateral edge of the corner feed table. The corner feed table is located at a lower level than the table delivery roller 14, see particularly Fi 3, so that each sheet issuing from the rol er pair 14, 15 comes into contact with the corner feed table only when the leading or forward edge of the sheet reaches about the longitudinal middle line of the corner feed table. Consequently, each sheet which has been completely deposited upon the corner feed table and is being conveyed upon the corner feed table to the following cross folder, will be partly covered by the subseuent sheet, see also Fig. 2, a perfectly reliable sliding of the superimposed sheet over the preceding sheet at the time of the deposition being insured by the guide tongues 13 which lie above the corres onding edge of the corner feed table 16. roper covering and overlapping will therefore take place even in cases in which a deposited folded sheet should have the tendency to open at its rear end. As there is no risk of a subsequent sheet being inserted into the deposited open end of a sheet previously upon the corner feed table, the rollers 16a of the corner feed table and consequently the rollers of the cross folder fed by the table may be allowed to run at a lower speed. This reduction of the speed of the feed table and the cross folder may be so high that the actual working speed of the cross folder need not be higher than the speed of the previous folder. A perfect folding may,
therefore, be obtained whilst maintamin a continuous supply of sheets. In ot erwords, it is not necessary to provide for an interval between two following sheets in the first feed of the folding machine in order to compensate for the difference in the speeds of the two following folders.
The corner feed table is provided in known manner with an adjustably mounted registering rule 17 Upon this rule is mounted an adjustable riding support 18 which may be clamped in any desired position upon the rule and carries by means of a pivot pin 19 parallel to the conveying rollers 16 a double armed lever 20. The longer arm of the lever 20 carries upon its end a brush roller 21, whilst the shorter arm of the lever rests upon a set screw 23 probeing conveyed by the feed rollers 16a of the corner feed table may be regulated at will. The riding support 18 carries also a guide plate 24, which guides the sheet into position under the brush roller. If required two or more brush rollers may be provided.
Owing to the yielding and soft pressure exerted by the brush rollers, the deposited sheets are immediately and reliably pushed by the feed rollers against the registering rule and they cannot, even at very high working speed, slide back. The partial overlapping of the sheets upon the corner feed table enables the folded sheets'to be conveyed to the following cross folder 25 very closely one after the other, so that the required folding operations can be satisfactorily'performed notwithstanding the fact that the sheets are continuously and with out any interval fed by the first feed table 1. The peripheral speed of the folding rollers of the cross folder need not, as in the hitherto known constructions, be greater by about one half than the peri heral speed of the folding rollers 4, 5, 6 of the preceding folder, but it may be approximately the same or even lower than the speed of the rollers 4, 5, 6. The folding rollers of the cross folder 25 are driven from the preceding roller through a bevel gear 26. The slow folding speed within the cross folder and the slow feed of the sheets towards the cross folder leads to a very accurate registration of the sheets along the registering rule of the corner feed table and it also results in a very accurate folding, and owing to the reduction of the discharge speed, a I
very gradual and reliable discharge upon the delivery stack 27 is insured.
I claim:
1. In cross folding machines the combination of: a first folder; a second folder; means for transferring sheets folded within the first folder to the second folder, said means comprising a corner feed table; and means for partly superposing the folded sheets coming from the first folder whilst delivering same to the corner feed table, whereby the folded sheets are delivered to the second folder in such a manner that each sheet is overlapped by the following sheet, substantiall as described.
2. In a cross fo ding machine of the ty referred to, the combination of: a first folder; asecond folder; means for transferring the folded sheets from the first folder to the second folder, said means comprising a er; a second folder; a corner feed table interposed between the said two folders; means for delivering the folded sheets from the first folder to the said corner feed table, said means comprising pushing delivery rollers and guide tongues, said guide tongues being situated at a higher level than the corner feed table and projecting over the corner feed table, substantially as desrcibed.
4. In a cross folding machine of the type referred to, the combination of: a folder; a second folder; means for transferring the folded sheets from the first folder to the second folder, said means comprising a corner feed table; means for partly superposing the folded sheets during their delivery upon the corner feed table; and means for pressing the delivered sheets upon the corner feed table, said means comprising brush rollers, substantially as described.
5. In a cross folding machine of the type referred to, the combination of: a folder; 9. second folder; means for delivering the folded sheets from the first folder to the second folder, said means comprising a corner feed table provided with feed rollers arranged at an angle other than 90 to the direction of the feed; means for partly superposing the folded sheets during their delivery upon the corner feed table; and means for pressing the deposited sheets against inclined feed rollers, said means comprising brush rollers, adapted to rotate about axes parallel to the inclined feed rollers, substantially as described.
6. In a cross folding machine of the type referred to, the comblnation of: a folder; a second folder; means for transferring the folded sheets from the first folder to the second folder, said means comprising a corner feed table; means for partly superposing the folded sheets durin their delivery upon the said corner feed ta Ie; the folding speed of the second folder not being greater than the folding speed of the first folder, substantially as described.
Signed at Leipzig, Germany, this eighth day of January, 1932.
GEORG SPIESS.
US588861A 1931-01-31 1932-01-26 Cross folding machine Expired - Lifetime US1898794A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2669454A (en) * 1951-07-05 1954-02-16 Babicz George Device for aligning feed of paper sheets in printing machines
US2674456A (en) * 1950-07-29 1954-04-06 Jr George A Gibson Conveying and registering mechanism
US2782734A (en) * 1951-05-08 1957-02-26 Stickelber & Sons Inc Oblique curling loaf molders
US3260518A (en) * 1964-03-27 1966-07-12 Chicago Dryer Co Small piece folder
DE3135277A1 (en) * 1981-09-05 1983-03-31 Hagen Gaemmerler Rotating cutting system
US4585219A (en) * 1984-07-10 1986-04-29 Mathias Bauerle Gmbh Series feeding device for a folding machine
EP0578510A1 (en) * 1992-07-09 1994-01-12 Pitney Bowes, Inc. Cross folder transport

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2674456A (en) * 1950-07-29 1954-04-06 Jr George A Gibson Conveying and registering mechanism
US2782734A (en) * 1951-05-08 1957-02-26 Stickelber & Sons Inc Oblique curling loaf molders
US2669454A (en) * 1951-07-05 1954-02-16 Babicz George Device for aligning feed of paper sheets in printing machines
US3260518A (en) * 1964-03-27 1966-07-12 Chicago Dryer Co Small piece folder
DE3135277A1 (en) * 1981-09-05 1983-03-31 Hagen Gaemmerler Rotating cutting system
US4585219A (en) * 1984-07-10 1986-04-29 Mathias Bauerle Gmbh Series feeding device for a folding machine
EP0578510A1 (en) * 1992-07-09 1994-01-12 Pitney Bowes, Inc. Cross folder transport

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