DE1611339A1 - Folding device for strip-shaped or web-shaped material - Google Patents

Description

PATSNTANWXLTI "■" .-. DR. E. WIEGAND DIPL-ING. W. NfEAAANN - DR. AA. KÖHLER DlPL-ING. C. GERNHARDT MONKS HAMBUtO. Λ

3 "53i4 2000 HAMBURG 50, 9". November 1967

TELEORAMMEtKAKPATENT KONIOSTItASSESI

W.13372 / 67 12 / Me

Anelex Corporation Boston, Massachusetts (V.St.A.)

! "old device for tape-shaped or web-shaped

Material.

The invention relates to folding devices for tape-like material or sheet-like material and, more particularly, to devices which can fold paper of the type commonly used with printing devices in data processing systems and other systems . - .- ■■.

Modern printing devices for data processing and Communication systems' often use fan-like folds Paper ^ which generally consists of several layers of paper, between which carbon paper is arranged. To After printing, it is advisable to replace the paper with a new one Repackage folds along the appropriate JPaIt lines. "B§4. with? continuous low speed Often, daa fapier can only work under the influence

gravity v / ground hay folded when it is from the pressure device falls on a pile. However, it can work at high speed or intermittently the printing device may result in improper stacking due to air resistance and other effects. Previous attempts Quickly re-stacking paper at high and intermittent speeds was by using oscillating guide rods and other mechanisms e.g. Sometimes successful, but wrinkled or puckered itself Using such devices the paper sometimes behind the guide rods due to the friction between the guide rods and the paper. In general, that multiplies smallest ripple, pinch or any other deviation in the pattern of the paper to be stacked immediately, resulting in the random ejection of the paper from the printing device leads and requires that the operator shut down the printing device and the unstacked Fold paper by hand.

According to the invention, an accurate stacking is achieved that instead of guide rods or other passive Mechanisms the paper advance mechanism itself is swinging. This way, the paper won't pucker or wrinkle during or; before the swing process, but is forced to alternate along) the folding lines to form a stack wrinkles. Preferably the paper advance mechanism has two pulling organs provided with protrusions or teeth on "

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which engage holes along the edge of the paper step, and the swinging is achieved by the Exit ends of the pulling elements are moved back and forth. The traction organs are in synchronism with the; Feed of the Paper reciprocated and every complete oscillation corresponds to two sheets of paper (folds). Preferably, the oscillating circuit is changeable in order to be different on arcs Adjust length. A stacking platform is below the swinging ones Pulling organs arranged to be adjustable to collect the stacked paper «

When the paper stacking device is unitary with the printing device; is, the traction elements are _{synchronously:} advanced when the printing of lines is terminated "If a separate paper stacking apparatus is operated independently of the Druckmechanistiius, it is preferable to store the paper between the pruckmechanismus and the stacking device. In accordance with the invention, an intermediate storage chamber is provided which can hold a loop of loosely hanging paper, and a photodetector mechanism is used to determine the amount of paper in the storage chamber and to control paper advance from the storage chamber to the stacker accordingly. In the preferred embodiment of the invention, air is drawn from the bottom of the food canisters to reduce the pressure of air under the bow of hanging paper, thereby drawing papers from the food cans as it drifts off the

00385070115

• Printing device is fed. The storage chamber is rectangular Shape and dimensions such that the loop of hanging paper essentially takes the flow of air into it blocks the storage chamber, maintaining reduced pressure under the loop. Another feature consists in using an air bearing between the Storage chamber and the stacking device. Compressed air is pushed through holes around a curved surface to prevent the To hold paper at a relatively fixed distance against contact with the surface. In the preferred embodiment of the invention provides a single air flow mechanism (e.g. a blower) for both the reduced Pressure for the storage chamber as well as the increased pressure for the air bearing.

The purposes and advantages of the invention will be apparent from the following description in which the invention is explained with reference to the drawing, for example.

Figure 1 is a diagrammatic view of a preferred one Embodiment of the paper stacking device including the storage chamber and the air bearing .

FIG. 2 is a schematic view showing the operation of the apparatus of FIG. 1 is.

Fig. 5 is a detailed view showing the work err de.s paper feed mechanism is reproduced,

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both the paper feed and the swing are explained.

According to Pig. 1 enters a tape of paper ^ 2 that is stacked should be, from the back one, to a hanging one Loop in a buffer chamber or storage chamber 4 closed form. Air is drawn from the bottom of chamber 4, to cause the fed paper 2 to enter the chamber 4. Two paper feed members 6, one of which is shown engage spaced holes 8 along the edges of the paper 2, to advance the paper 2 in the downward direction against a stacking platform 10. The platform 10 is adjustable in height and as the stack of paper increases, it is lowered by the operator or by automatic means.

The pulling elements 6 engaging with the paper 2 not only move the paper 2 forward, but also give it a reciprocating or rocking motion to cause folding along fold lines or to force. The distance between the fold lines 12 determines the relationship between the feed rate of the paper 2 and the oscillation frequency of the pulling elements 6. This is done by means of a control device 14 by the operator set. The paper 2 moves between the chamber 4 and the pulling element 6 via an air bearing 16, which a generally semicircular sheet of material

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which has air holes (not shown) around its surface. The air coming from the bottom of the chamber 4 is withdrawn, the holes in the air bearing 16 below Pressure is applied to keep the paper 2 at a distance from the bearing surface and accordingly the friction to decrease.

The operation of the device can be seen more clearly from Fig. 2, in which the dimensions are somewhat enlarged to make the description easier.

The paper web 2 enters the storage chamber 4 under the influence of the reduced air pressure that is in the lower area of the chamber 4 as a result of an air flow mechanism 18 is present, for example a fan or blower. The bottom surface 20 of the Kamnjer 4 has holes to allow the evacuation of air. The end walls of the chamber 4 are not shown in FIG. 2, but are located they are at a distance from each other, which is slightly larger than the width of de & paper 2, to allow air flow in the lower Keep the area of the chamber 4 to a minimum. However, it has been found that working satisfactorily by itself is obtained when there is a considerable space at the edges of the paper 2.

The paper 2 is pulled out of the storage chamber 4 and past the air bearing l6 by engaging the pulling members 6, which advance the paper 2 in the direction towards the stacking platform 10. Compressed air ”is passed to the air bearing 16

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the same blower 18 supplied, which causes the reduced pressure in the chamber H.

The Zugorgane 6 have teeth 22 around a endless belts are arranged, which is driven around advance the paper 2. While the pulling members 6 are driven are, their lower ends are alternating to each Side of the vertical direction swung into the positions, represented by broken lines 2 ^. The traction organs 6 are from a Zügorgansteuerciechanismus 26 under the influence of signals from an optical device 28 advanced and reciprocated.

The optical device 28 sends Eicht against two inclined mirrors 30 in the direction of two mirrors 32. Das Light reflected from the mirrors j52 -were through the mirrors JO to the photodetectors of the optical device 28 retransmitted. The photodetectors in turn provide signals to the puller control mechanism 26. If the paper loop in the chamber 4 is above a first vörbestircnites The upper one is enlarged as shown in the illustration Blocked light path. "If the paper loop is enlarged further, the lower light path is also blocked is working by, the amount of paper in the chamber 4 of the Zugorgansteuermechanismus 26 controlled to the -'- 2ugoga; ne 6 advance and swing under the right conditions. .According to the invention, a two-way winciötaits-

Pulling member control mechanism 26 is used according to which the

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Pulling members 6 at low speed when the paper loop comes under the upper light path in the chamber 4, and driven at high speed as the loop passes under the lower light path. If the Pulling elements 6 are driven at high speed, the size of the loop is reduced because at faster Movement of the pulling elements 6, the paper is advanced faster than it can be fed to the chamber 4. When the paper loop rises above the lower light path, the pulling elements 6 can again be switched to the low speed will, however, in the preferred embodiment of the invention continues working rapidly until the loop is over the upper light path to whichever Time the pulling elements 6 are stopped.

The optical device 28 and the Zugorgansteuermechar.ismus 26 are not described in detail, since optically controlled drive mechanisms of the type shown are known are"

The pulling elements 6 and their control mechanism 26 are shown in detail in FIG. The paper 2 includes spaced apart holes 8 located along its edges. The pulling members 6 are of known design and they comprise an endless chain J4, the links of which carry teeth 22 which engage with the holes 8 in order to bring about a forward movement of the paper 2 when the chain ^ 4 is driven. A paper clamp 36 holds the edges of the paper 2

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against, the teeth 22. The terminal J56 is arranged in such a way that that it can be pivoted from its position to Inserting or removing paper 2. A spring 38 creates inevitable arrangement of terminal 36.

When paper 2 is to be advanced as determined by 'signals from optical device 28, Fig. 2, a motor (not shown) operates at the desired speed and drives a shaft 40 (Fig. 3) . This movement becomes from a gear 42 to a gear 44 to transmit motion to the chain ^ 4. The gear 44 is supported by bearings on a shaft 62 to allow independent movement of the gear. The movement of the shaft 40 is also transmitted to a selection gear 52 via a plurality of gears 46, 48 and 50. The gears 48 and 50 are mounted on a support 54 which is adjustable to enable the gear 50 to cooperate with the gear 52 according to the spacing between the paper folds. The selection of the gear 52 is the setting of the tax regulations ^r "direction L4 (Figures 1 and 3). The movement of the Zahnrades1 52 is transmitted via a crank 56 on an arm 58 to swing arm 60 to another. This' ächwingbeweguhg is "transfer shaft 62 to an arm 6l, which causes the lower end of ZngöigäWs 6 vibrates and 'accordingly the stacking of the paper 2 ^ along the" a cause Palfcl'inien 12 Accordingly, ^the;. traction elements 6; in a circle "'

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run swung, which depends on the advance speed of the traction elements 6 and the selected gear 52 to to cause the paper 2 to fold to the fold lines 12 corresponding times folds. To ensure synchronization with the fold lines 12, the pulling device initially set in an appropriate position by an operator. This setting is only required if when a paper tape is fed into the stacker for the first time.

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Claims (6)

fly folding device for web material or "sheet-like material having a passing with the material Iji engagement means for advancing the material along its length" characterized by means to at least a portion of the bahnförmlgen with the band-shaped or * Material (2)-engaging means ( 6) to issue a cyclical oscillating movement, the oscillating cycle being dependent on the length of the material web in a fold and the speed of movement of the material web. E. Device according to claim 1, characterized in that DA® the curving means (6) for symmetrical oscillating movement formed with respect to the vertical direction and a Faltplattform (10) is provided for the _f Auftmhme the material web under the web in the Intervening Eiiirlchtung {€) is arranged adjustable. 3 * Device according to claim 1 or S »characterized * that zviei tni% of the track engaging salt pans (Sg | provided Elnrlclituiigea | 6) are provided, the end of which eats with a line of spaced IiScheren) along a Xante the perforated material baim {&) toaawirnen works. - 4 »Apparatus according to, ^ uaem der Äiis ^ rÜclie 1 to %. characterized by a Matierialspeichereiaritihtung f%) _{4 in} front of the ^ device entering into engagement with the material path ORlGIHAL INSPECTED _t (6) is arranged and designed to create a hanging storage at the entrance of the folding device. 5. Apparatus according to claim 4, characterized in that the device engaging with the web of material (6) can optionally be activated and a device (28 to 32) for sensing the amount of sag "in the memory device (4) for controlling the activation of the device engaging the web of material is. 6. Apparatus according to claim 5, characterized in that the device engaging with the material web (6) can optionally be activated with at least two speeds and the sagging sensing device (28 to 32) for controlling the speed of activation of the device engaging the web of material is trained. 7. Device according to claim 6, characterized in that that the means (6) engaging with the web of material when sagging below a small predetermined amount can be stopped if it sags over a large pre-immtes Extent activatable at high speed with sagging between the small and large predetermined extent Can be activated at low speed after standstill and when there is sag between the small and the large a predetermined extent can be activated at high speed after high-speed state. 0 0 9 8 5 0/0115 S »Iforrichtang men one of the anxiety levels 4 big7» da «marked by * that the spear orientation (4J a 'downwardly removed öhfeöekig © Käfflraep and a tuft- ätp'omungäeinpi & hnung (18) gum Äfegiesen von. Luft; from the ground (see above) d ^ i ¹ Eammsr, the dimensions of which are a & fktt that öiiiö hanging'Bahnsshi © lfö in dei * Kamm ti * on the way dei * liUffcstji'omung in. the chamber im.wesehiJliöhen- blööklerfe,: um 'd§n LuffcdFUcsk - under det * ßähn§öhl © ife au verflngem. 9, Ve ^ iehfeung haoh Ansp ^ uüh 8V "i@kennzei.öhnet dureh An iieiifegffipfiridliehe Fühi © im? ifeung ium Abfühien des Extent of the ßu ^ ehhingena In des * Chamber (4). 10 * V6ri? Soldering after Anspj? Uoh 8 o'deif 91 daduröh: know « i that the entrance to Lingpiff by train (6) ψοά the Speiehereinrlöhtung (4) separated by an air bearing (16) ISTJ, welGhem from the chamber peeled liUft the Luftgtrömuniseinriehtung (18) mitteli under bridge is supplied _»..:; V OOSSSÖ / 011S Blank page