US3533618A - Device for feeding sheets - Google Patents

Device for feeding sheets Download PDF

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Publication number
US3533618A
US3533618A US733914A US3533618DA US3533618A US 3533618 A US3533618 A US 3533618A US 733914 A US733914 A US 733914A US 3533618D A US3533618D A US 3533618DA US 3533618 A US3533618 A US 3533618A
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United States
Prior art keywords
suction
sheet
roller
shoe
feeding
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.)
Expired - Lifetime
Application number
US733914A
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English (en)
Inventor
Jorgen V Carstens
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JORGEN V CARSTENS
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JORGEN V CARSTENS
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    • 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
    • B65H5/22—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device
    • B65H5/222—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device by suction devices
    • B65H5/226—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device by suction devices by suction rollers

Definitions

  • the invention relates to a device for feeding sheets, e. g. paper sheets, which are drawn against the surface of the suction roller by means of a vacuum.
  • sheets e. g. paper sheets
  • the suction roller rotates, the inlet of said apertures passes a short distance from an independently pivotable suction shoe having an aperture, the inlet of which is connected to the vacuum source.
  • the suction shoe is movable towards the suction roller, but is kept at a short distance from the suction roller by a suitable force, which can be overcome by the vacuum when a sheet is placed on the roller, so as to cover the grooves in register with the aperture in the suction shoe.
  • the suction shoe When a sheet covers said grooves, the suction shoe is, by the vacuum thereby becoming effective, drawn against the rotating roller and by contact with the rotating roller carried along with this roller until a stop for the suction shoe is reached.
  • the sheet is gripped continuously by the vacuum at the leading edge.
  • the zone in which the sheet is gripped moves backwards from the leading to the lagging end of the sheet.
  • the lagging end of the sheet leaves the gripping zone moved by the rotating roller, thereby permitting a larger quantity of air to reach the apertures in the grooves, so that the force on the suction shoe is no longer overcome and the suction shoe is consequently retracted.
  • a resetting force carries the suction shoe to the initial position, ready for renewed action.
  • the device can be utilized, inter alia, for feeding sheets or opening and feeding folded sheets.
  • the invention relates to a device for feeding sheets by means of a rotary feeding member, a suction roller, against which the sheet is drawn by a vacuum.
  • Devices of this type are employed in machines used in bookbinding works, e.g. in the form of a rotary, hollow cylindrical feeding member, in which a stationary suction shoe is provided, which supplies a vacuum to a part of the inner side of the cylinder provided with openings, so that on the outer side of the cylinder there is produced a suction over an area determined by the size of the suction opening in the suction shoe and by the design of the openings in the cylinder.
  • the suction area is, during the rota- 'ice tion of the cylinder, displaced along the surface of the cylinder. Viewed in relation to the sheet advanced, the suction area moves constantly to the rear from the front edge of the sheet during the feeding of the sheet.
  • the mechanism can, for example, be utilized for the opening of folded sheets.
  • the device according to the invention is characterized by a vacuum supply member, a suction shoe which cooperates with the suction roller, but is pivotable independently of the latter and arranged for being carried along by the suction roller, so that the suction area follows the suction roller over a predetermined distance.
  • FIGS. 1 to 4 show an embodiment of a device according to the invention in four different stages during the feeding of a sheet, the direction of movement of which is deflected by 7
  • FIG. 5 shows an embodiment of part of a suction roller for a device according to the invention with an internal suction shoe and viewed in partial section, and
  • FIGS. 6 and 7 viewed in the axial direction and in section, respectively show part of an embodiment of a device according to the invention comprising an external suction shoe.
  • numeral 1 designates a feeding member, which is designed as a suction roller and shown in section revealing the suction openings disposed along the circumference in a radial plane.
  • One of the said openings is denoted by 2.
  • Such suction openings are in a suitable way distributed along generatrices on the suction roller.
  • the suction roller must be imagined to move at a constant velocity in the direction of the arrow A in FIG. 1.
  • the rotary movement may, for example, be provided in the way indicated in FIG. 6 by means of a belt drive or a chain drive.
  • the shaft 3 of the suction roller is hollow and serves for supplying a vacuum to a suction shoe 4 extending a distance in the axial direction, which may correspond to the length of the suction area desired.
  • the suction shoe 4 having an elongated axial slot is mounted pivotable on the shaft 3 with the axial slot allowing movement in the radial direction, as will appear from a comparison between FIG. 1 and FIG. 2. In the latter figure, the suction shoe contacts the inside of the suction roller 1.
  • the suction shoe 4 is actuated by a setting device, not shown, e.g. a torsion spring or a vacuum mechanism. After the feeding of a sheet is finished, the setting device resets the suction shoe into the position shown in FIG. 1, the said position being determined by a stop member 5. Another stop member 6 limits the angle through which the suction shoe 4 is turned counterclockwise during operation.
  • the two stop members 5 and 6 may be adjustable.
  • the suction shoe 4 comprises an axially extending suction duct, which is shown dotted at 7 and which is in communication with a vacuum supply line, not shown, which is connnected to the hollow shaft 3.
  • P designates a sheet, e.g. a paper sheet, which in some way or other is fed to the rotary roller.
  • a sheet e.g. a paper sheet
  • the suction shoe 4 will move radially, being drawn against the inner side of the suction roller 1. Due to the friction between the suction shoe 4 and the suction roller 1, the suction shoe 4 will be carried along with the suction roller 1 in the direction opposite to that of the setting device, not shown. This causes the front edge of the sheet to remain under a vacuum and thus to be drawn continuously against the suction roller, while the suction area in the space moves along a circular arc until the suction shoe 4 is stopped by the stop member 6.
  • FIG. 3 shows the moment when the movement of the suction shoe is stopped, while FIG. 4 shows the position shortly afterwards.
  • the device shown in FIGS. 1 to 4 can be used for opening folded sheets advanced with the folded edge lagging.
  • the rigidity of the material will entail that the upper part of the folded sheet will continue along the tangent, indicated by dotted line 8 in FIG. 3, while the lower part of the sheet will be curved around the suction roller.
  • two suction rollers may be used, the outer surfaces of which almost touch, so that each of the two parts of the folded sheet is gripped by its suction roller.
  • the axes of the two suction rollers may be disposed on a horizontal plane, while the paper sheet is supplied vertically between the two rollers.
  • the device according to the invention offers the advantage that the conveyor can be placed quite closely to the suction rollers, so that the distance the sheet has to drop in its opened state is shortened, which diminishes the risk of wrong delivery.
  • the opening angle can be made optionally large, e.g. even 180".
  • the return of the suction shoe 4 from the position shown in FIG. 4 is effected by means of the resetting device, not shown, as soon as the rear edge of the paper sheet P has left the suction area, the friction between the suction shoe 4 and the suction roller 1 being reduced when air makes its way in through the suction openings in the suction roller 1.
  • the device according to the invention is distinguished by being uncritical with regard to dimensions. This applies e.g. to the distance between the suction shoe 4 and the inside of the suction roller 1, which means that a reliable functioning is preserved after even prolonged use with the wear deriving therefrom.
  • the device may also be used for removing single sheets from a pile. It has turned out that the device works more reliably than ordinary mechanisms, and this is first and foremost due to the suction area remaining at the front edge of the paper sheet during the first part of the feeding movement.
  • FIG. 5 The constructive embodiment of a suction roller shown in FIG. 5 is shown cut off at the end pointing left in the figure.
  • the suction roller is twice as long as shown, a part symmetrical with the one shown being provided which comprises a separate suction shoe, so that as a whole the mechanism may be used either for advancing two sheets independently of each other, or for advancing single wide sheets.
  • the suction roller 51 has in the embodiment shown a diameter of about 70 mm. and the surface is provided with a number of sharp-edged grooves 52, in which suction openings 53 terminate.
  • the depth of the grooves 52 is in this embodiment about 1 mm, being so dimensioned that by being drawn against the surface of the suction roller, the sheet reduces the vacuum area between sheet and roller without blocking the suction openings 53.
  • the suction shoe designated by 54, comprises a vacuum aperture 55, which is disposed in line with an opening 56, which, through the hollow shaft, designated by 57, is in communication with a vacuum source, not shown.
  • the suction shoe 54 which, when not influenced by external forces, is so adjusted as not to touch the suction roller, can move radially against the elfect of springs, not shown, which springs may be adjustable. In the figure, the suction shoe is shown resting against the inner side of the suction roller 51 and therefore at a distance shown by the clearance 58 from the outside of the hollow shaft 57.
  • the suction shoe 54 does not take up the position shown, until the suction openings 53-, in line with the suction shoe, are covered by a sheet and vacuum has been applied. Both of these conditions should be fultilled in order that a feeding of sheets may take place. This fact can be utilized for providing two different types of sheet feeding.
  • the suction roller In the case of one type of sheet feeding, the suction roller is constantly under a vacuum, which causes the functioning of the suction roller to be dependent solely on the arrival of sheets. As soon as a sheet covers the suction openings, the feeding starts, the roller rotating constantly.
  • the supply of vacuum to the suction roller is controlled by a valve inserted at a suitable point of the vacuum supply line.
  • This valve which is not shown, is controlled e.g. electrically, mechanically or pneumatically in dependence on some function or other in the machine with which the suction roller cooperates, or only by a time pulse generator. This means that it is not the arrival of a. sheet that determines the time for starting the sheet feeding, but on the contrary, it is the starting pulse, which actuates the vacuum valve for opening.
  • the advance of the sheet can be brought to a stop and the resetting of the suction shoe can be effected in two ways. viz. either by the sheet leaving the suction openings within the range of the suction shoe, or by the supply of a vacuum being interrupted, e.g. by the said valve being actuated.
  • the setting of the suction shoe is effected by means of a spiral spring 59.
  • a handle 60 with an adjustment scale, not shown, is through a tubular member 61 connected to a stop member 62, which in this way can be adjusted with a view to adjusting the angle at which the suction shoe can be turned by the suction roller, a cam on the suction shoe abutting against the stop member.
  • another adjustable stop member not shown, can limit the movement of the suction shoe in the opposite direction.
  • the suction roller 51 journalled on ball bearings, of which only two, 63 and 64 are shown to the right in the figure, is turned by means of gear wheels 65 and 66, of which 66 is shown only partially.
  • the suction shoe moves radially during the suction process, but this movement can, without any deviation from the principle of the invention, be axial as appears from the embodiment example shown in FIGS. 6 and 7, where the suction roller 1 is mounted pivotable around a stationary shaft 3 and comprises suction openings 2 arranged in rows, each of which is in communication with one duct 9 terminating in openings 10 in one of the end faces of the suction roller, while the ducts 9 are closed at the other end face.
  • a suction shoe is placed pivotable and axially displaceable on the shaft 3, which is hollow and comprises an opening 13 for the supply of a vacuum to a suction duct 12 in the suction shoe 14.
  • a helical spring 15 is disposed, one end of which is secured to the shaft 3 and the other end of which is secured to the suction shoe 14.
  • the spring functions as a resetting spring for the suction shoe 14, the movement of which around the shaft 3 may be limited by stop members as indicated in FIG. 1, or as shown in FIG. 5.
  • the suction roller 1 rotates, e.g. driven by means of a driving belt 16 and a motor 17.
  • the suction shoe 14 takes up the position shown in the figure.
  • the suction shoe 14 is drawn against the end face of the suction roller 1 and moves with the latter due to the friction.
  • the suction area remains at the front edge of the sheet as long as the suction shoe 14 is carried along by the suction roller 1.
  • the suction duct 12 which expediently extends over at least two adjacent openings 10, is thereby gradually put in communication with different ducts 9, so that the suction area moves along the surface of the suction roller 1, until the rear edge of the sheet passes out of the suction area, whereby air makes its way into the suction duct 9, so that the pressure and thereby the friction between the suction roller 1 and the suction shoe 14 is reduced and the resetting spring can lead the suction shoe 14 back into its initial position, where it is ready for receiving a new sheet.
  • An adjustment of the length of the suction area in the axial direction of the suction roller may be effected in many different ways. Interchangeable rollers or interchangeable suction shoes may be used. The number of suction shoes may be altered, so that more are in use when wider paper sheets are used.
  • the suction roller may also be constituted by two cylinders, one within the other, and both provided with suction openings, the outer cylinder being in the axial direction divided into sections which can be turned separately in relation to the inner cylinder, so that the suction openings can be made to lie flush with each other or lie displaced in relation to each other, in which latter case the suction area is limited. Between the inner cylinder and each of the sections of the outer cylinder a locking mechanism may be provided, e.g. a ball lock, which serves in part to retain the sections in the extreme positions in which they are set, partly for guiding their relative movements by grooves being provided in the inner surface of the sections.
  • a locking mechanism may be provided, e.g. a ball lock, which
  • the suction shoe can actuate a valve, which, with a desired, preferably adjustable delay effects the return of the suction shoe to its initial position. Electric, magnetic or electromagnetic forces may also be used for providing the function desired.
  • the pressure in the suction duct of the suction shoe may e.g.
  • the setting, one way or another, of the suction shoe may occur under the sole influence of the force of gravity, e.g. in the case of an at least partially vertical transport.
  • a sheet feeding device comprising a perforated suction roller; a tubular axle adapted to be connected to a vacuum source and having said roller rotatably mounted thereon; means for continuously rotating the roller; shoe means rotatably mounted on said axle and displaceable in the direction of the roller, said shoe means being adapted to contact the roller and follow the movement thereof; a conduit formed between the interior of said axle and bearing face of said shoe means; and means for resetting the shoe means to an initial position when no sheet closes those perforations of the suction roller which are positioned to receive vacuum from the end of said conduit in the bearing surface of the shoe.
  • a sheet feeding device as claimed in claim 1 further comprising adjustable stop means for limiting the rotational movement of said shoe means.
  • a sheet feeding device as claimed in claim 1 wherein the surface of the suction roller is provided with a plurality of sharp-edged suction grooves, each of which is adapted to prevent blocking of the perforations in the grooves by a sheet sucked against the surface of the roller.
  • a sheet feeding device as claimed in claim 1 further comprising means for controlling the connection of vacuum to the suction shoe.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Advancing Webs (AREA)
US733914A 1967-06-12 1968-06-03 Device for feeding sheets Expired - Lifetime US3533618A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK304767AA DK112101B (da) 1967-06-12 1967-06-12 Apparat til fremføring af ark.

Publications (1)

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US3533618A true US3533618A (en) 1970-10-13

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Application Number Title Priority Date Filing Date
US733914A Expired - Lifetime US3533618A (en) 1967-06-12 1968-06-03 Device for feeding sheets

Country Status (8)

Country Link
US (1) US3533618A (enrdf_load_stackoverflow)
JP (1) JPS5324707B1 (enrdf_load_stackoverflow)
CH (1) CH479476A (enrdf_load_stackoverflow)
DE (1) DE1761542C3 (enrdf_load_stackoverflow)
DK (1) DK112101B (enrdf_load_stackoverflow)
FR (1) FR1568586A (enrdf_load_stackoverflow)
GB (1) GB1172481A (enrdf_load_stackoverflow)
SE (1) SE321917B (enrdf_load_stackoverflow)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4029537A (en) * 1975-12-08 1977-06-14 Pitney-Bowes, Inc. Label applicator
US4168829A (en) * 1977-06-20 1979-09-25 Eastman Kodak Company Control valve for vacuum sheet feeding apparatus
US4202542A (en) * 1977-12-01 1980-05-13 International Business Machines Corporation Apparatus for handling flexible sheet material of different sizes
US4216954A (en) * 1977-06-07 1980-08-12 De La Rue Giori S.A. Apparatus for diverting paper sheets or the like from a first path into a second path
WO1983003148A1 (en) * 1982-03-01 1983-09-15 Eastman Kodak Co Image transfer apparatus with sheet handling device for electrographic copier
US4408866A (en) * 1982-03-01 1983-10-11 Eastman Kodak Company Receiver sheet transport with alignment means
US4410264A (en) * 1982-03-01 1983-10-18 Eastman Kodak Company Receiver sheet transport with a guiding member and aligning mechanism
US4410263A (en) * 1982-03-01 1983-10-18 Eastman Kodak Company Sheet handling device for image transfer in an electrographic copier
US4765457A (en) * 1986-05-24 1988-08-23 Pelikan Aktiengesellschaft Paint box
US4838982A (en) * 1987-06-26 1989-06-13 H.G. Weber & Co., Inc. Patch applicator vacuum cylinder for web material
EP0413471A3 (en) * 1989-08-12 1992-01-15 Konica Corporation Paper feeding apparatus
US5427368A (en) * 1993-08-02 1995-06-27 Meinan Machinery Works, Inc. Sheet-like article sort-out apparatus
US20030045415A1 (en) * 1999-07-13 2003-03-06 C.G. Bretting Manufacturing Company, Inc. Vacuum assisted roll apparatus and method
US6773006B2 (en) 2001-10-24 2004-08-10 Pitney Bowes Inc. Pneumatic apparatus with removable vacuum shoe
US20060021534A1 (en) * 2004-07-30 2006-02-02 Beaudry Wallace J Method and apparatus for retaining individual sheet substrates in a curved configuration
US20090084715A1 (en) * 2007-09-28 2009-04-02 Kabushiki Kaisha Toshiba Paper sheet separating apparatus
US20120152695A1 (en) * 2010-12-17 2012-06-21 Kimberly-Clark Worldwide, Inc. Vacuum roll and method of use
US8939445B2 (en) 2013-05-30 2015-01-27 Kimberly-Clark Worldwide, Inc. Vacuum roll with internal rotary valve
CN104340749A (zh) * 2014-09-11 2015-02-11 拓卡奔马机电科技有限公司 拉布机的松紧自动调节装置
US10167156B2 (en) * 2015-07-24 2019-01-01 Curt G. Joa, Inc. Vacuum commutation apparatus and methods
US11078037B2 (en) * 2017-12-15 2021-08-03 Andrea Bernacchi Roller conveying unit for conveying a sheet by means of aspiration
CN113277365A (zh) * 2020-02-20 2021-08-20 Vmi荷兰公司 用于将条带施加到鼓的施加辊、轮胎部件供料器以及方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2601984A (en) * 1950-01-20 1952-07-01 Douglas H Pope Sheet feeding apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2601984A (en) * 1950-01-20 1952-07-01 Douglas H Pope Sheet feeding apparatus

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4029537A (en) * 1975-12-08 1977-06-14 Pitney-Bowes, Inc. Label applicator
US4216954A (en) * 1977-06-07 1980-08-12 De La Rue Giori S.A. Apparatus for diverting paper sheets or the like from a first path into a second path
US4168829A (en) * 1977-06-20 1979-09-25 Eastman Kodak Company Control valve for vacuum sheet feeding apparatus
US4202542A (en) * 1977-12-01 1980-05-13 International Business Machines Corporation Apparatus for handling flexible sheet material of different sizes
WO1983003148A1 (en) * 1982-03-01 1983-09-15 Eastman Kodak Co Image transfer apparatus with sheet handling device for electrographic copier
US4408866A (en) * 1982-03-01 1983-10-11 Eastman Kodak Company Receiver sheet transport with alignment means
US4410264A (en) * 1982-03-01 1983-10-18 Eastman Kodak Company Receiver sheet transport with a guiding member and aligning mechanism
US4410263A (en) * 1982-03-01 1983-10-18 Eastman Kodak Company Sheet handling device for image transfer in an electrographic copier
US4765457A (en) * 1986-05-24 1988-08-23 Pelikan Aktiengesellschaft Paint box
US4838982A (en) * 1987-06-26 1989-06-13 H.G. Weber & Co., Inc. Patch applicator vacuum cylinder for web material
EP0413471A3 (en) * 1989-08-12 1992-01-15 Konica Corporation Paper feeding apparatus
US5427368A (en) * 1993-08-02 1995-06-27 Meinan Machinery Works, Inc. Sheet-like article sort-out apparatus
US20030045415A1 (en) * 1999-07-13 2003-03-06 C.G. Bretting Manufacturing Company, Inc. Vacuum assisted roll apparatus and method
US6773006B2 (en) 2001-10-24 2004-08-10 Pitney Bowes Inc. Pneumatic apparatus with removable vacuum shoe
US20060021534A1 (en) * 2004-07-30 2006-02-02 Beaudry Wallace J Method and apparatus for retaining individual sheet substrates in a curved configuration
US7367264B2 (en) * 2004-07-30 2008-05-06 Beaudry Wallace J Method and apparatus for treating sheets including a vacuum roller for retaining sheets in curved configuration
US20090084715A1 (en) * 2007-09-28 2009-04-02 Kabushiki Kaisha Toshiba Paper sheet separating apparatus
US20120152695A1 (en) * 2010-12-17 2012-06-21 Kimberly-Clark Worldwide, Inc. Vacuum roll and method of use
US8602198B2 (en) * 2010-12-17 2013-12-10 Kimberly-Clark Worldwide, Inc. Vacuum roll and method of use
AU2011342919B2 (en) * 2010-12-17 2017-08-24 Kimberly-Clark Worldwide, Inc. Vacuum roll and method of use
US8939445B2 (en) 2013-05-30 2015-01-27 Kimberly-Clark Worldwide, Inc. Vacuum roll with internal rotary valve
CN104340749A (zh) * 2014-09-11 2015-02-11 拓卡奔马机电科技有限公司 拉布机的松紧自动调节装置
US10167156B2 (en) * 2015-07-24 2019-01-01 Curt G. Joa, Inc. Vacuum commutation apparatus and methods
US10494216B2 (en) 2015-07-24 2019-12-03 Curt G. Joa, Inc. Vacuum communication apparatus and methods
US10633207B2 (en) 2015-07-24 2020-04-28 Curt G. Joa, Inc. Vacuum commutation apparatus and methods
US11078037B2 (en) * 2017-12-15 2021-08-03 Andrea Bernacchi Roller conveying unit for conveying a sheet by means of aspiration
CN113277365A (zh) * 2020-02-20 2021-08-20 Vmi荷兰公司 用于将条带施加到鼓的施加辊、轮胎部件供料器以及方法
WO2021167448A1 (en) * 2020-02-20 2021-08-26 Vmi Holland B.V. Applicator roll, tire component servicer and method for applying a strip to a drum
NL2024951B1 (en) * 2020-02-20 2021-10-13 Vmi Holland Bv Applicator roll, tire component servicer and method for applying a strip to a drum
JP2022524478A (ja) * 2020-02-20 2022-05-06 ヴェーエムイー ホーランド ベー． ヴェー． アプリケータロール、タイヤ部品サービサー、およびストリップをドラムに貼付するための方法
KR20220130263A (ko) * 2020-02-20 2022-09-26 브이엠아이 홀랜드 비.브이. 어플리케이터 롤, 타이어 구성요소 공급기, 및 드럼에 스트립을 적용하기 위한 방법
US20230070473A1 (en) * 2020-02-20 2023-03-09 Vmi Holland B.V. Applicator roll, tire component servicer and method for applying a strip to a drum
KR102518687B1 (ko) 2020-02-20 2023-04-06 브이엠아이 홀랜드 비.브이. 어플리케이터 롤, 타이어 구성요소 공급기, 및 드럼에 스트립을 적용하기 위한 방법
CN113277365B (zh) * 2020-02-20 2023-08-15 Vmi荷兰公司 用于将条带施加到鼓的施加辊、轮胎部件供料器以及方法

Also Published As

Publication number Publication date
SE321917B (enrdf_load_stackoverflow) 1970-03-23
DE1761542A1 (de) 1971-07-01
GB1172481A (en) 1969-12-03
DE1761542B2 (de) 1978-03-09
FR1568586A (enrdf_load_stackoverflow) 1969-05-23
DE1761542C3 (de) 1978-11-02
DK112101B (da) 1968-11-11
JPS5324707B1 (enrdf_load_stackoverflow) 1978-07-22
CH479476A (de) 1969-10-15

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