US1654158A - Sheet-feeding mechanism - Google Patents

Sheet-feeding mechanism Download PDF

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Publication number
US1654158A
US1654158A US680437A US68043723A US1654158A US 1654158 A US1654158 A US 1654158A US 680437 A US680437 A US 680437A US 68043723 A US68043723 A US 68043723A US 1654158 A US1654158 A US 1654158A
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Prior art keywords
sheet
web
feeding
speed
sheets
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US680437A
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Howard M Barber
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CB Cottrell and Sons Co
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Individual
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
    • D06H7/00—Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile materials
    • D06H7/02—Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile materials transversely
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/21—Strap tighteners
    • Y10T24/2102—Cam lever and loop
    • Y10T24/2119—Tie chain tighteners
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2092—Means to move, guide, or permit free fall or flight of product
    • Y10T83/2094—Means to move product at speed different from work speed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2092—Means to move, guide, or permit free fall or flight of product
    • Y10T83/2096—Means to move product out of contact with tool
    • Y10T83/2122—By ejector within a hollow cutter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2092—Means to move, guide, or permit free fall or flight of product
    • Y10T83/2183—Product mover including gripper means
    • Y10T83/219—Rotating or oscillating product handler
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4691—Interrelated control of tool and work-feed drives
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4737—With tool speed regulator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/474—With work feed speed regulator
    • Y10T83/4743—With means to vary cyclically speed of work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4766—Orbital motion of cutting blade
    • Y10T83/4795—Rotary tool
    • Y10T83/4818—Interconnected work feeder and tool driver

Definitions

  • the object of this invention is to provide means for coincidently adjusting the speed of the endless sheet feeding carrier with the adjustment of the speed of the Web feeding and cutting mechanisms With respect to the fixed speed of the sheet taking device so that different lengths of sheets may7 be fed to the sheet taking device Without distortion.
  • This is particularly desirable Where the sheets are cut and fed from a Web of light Weight and loosely Woven material, such for instance as burlap, and also Where the lengths of the sheets are varied between Wide limits.
  • FIG. 1 represents an elevation looking toward the right side of a web cutting and 3U sheet feeding machine including my improvement.
  • llfig. 2 represents an elevation looking to vvard the left side of the machine.
  • ltlig. 3 represents a detail horizontal cross section taken in the plane of the line iIL--TII of Fig. 2.
  • the main frame of the machine is denoted by 1 and the auxiliary frame which carries the means for feeding the Web and cutting lo the sheets therefrom is denoted by 2, which auxiliary frame 2 is adjustable longitudinally alone' the main frame 1 to different distances from the sheet taking device, to provide for the cutting and feeding of sheets of varying lengths.
  • the sheet taking device is herein shown as a set of grippers 3,
  • This cylinder 4 may be the impression cylinder of a, printing press.
  • the web feeding mechanism is herein shown as including the web feed roll 5, the web feed drum 6 and its coacting web feed sa rolls 7.
  • the mechanism for cutting the sheets from the web is shown asA comprising the coactlng rotary and stationary cutting members 8 rotary cutting member 8 is driven from the vertically disposed extensible shaft 11 at one side of the machine through the gears 12, 13.
  • This shaft 11 is driven from the main drive shaft 14 through the bevel gears 15, 16, the shaft 11 having a slidinginterloclied connection with the gear 15 to permit the longitudmal adjustment of the auxiliary frame 2 along the main frame 1 Without disconnecting the geared connection between the main drive shaft 14 and the rotary cutting member cross shaft 10, through the extensible shaft 11.
  • the cross shaft 17 of the web feed roll 5 1s driven. from the cross shaft 10 of the rotary cutting member 8 through the train of spur gears 18, 19, 20, 21, 22, 23.
  • the web feed drum 6 is driven from the cross shaft 17 through the spur gears 24, 25.
  • a horizontally arranged sheet feeding tape carrier 26 is carried by the main frame 1 and is arranged to feed the sheets from the cutting mechanism to the sheet taking grippers 3 of the cylinder 4, the tapes of which carrier pass around pulleys 27 at the inner end of the carrier and around the roll 28, the pulleys 29 and the roll 30 at the outer end of the carrier.
  • This sheet feeding tape carrier 26 is driven from the web feed roll cross shaft 17 which carries the gears 23 and 24 as follows:
  • a longitudinally disposed extensible shaft 31 is driven from the web feed roll cross shaft 17 by the bevel gears 32, 33, the vea-r 32 being slidably interlocked with the shaft 31. to permit the longitudinal adjustment of the auxiliary frame 2 along the main frame 1.
  • This extensible shaft 31 is also provided With a bevel gear 34 which meshes With a bevel gear 35 carried by a shaft 36, which shaft carries a spur gear 37 which forms a part of a train of spur gears 37, 38, 39, 40, leading to the gear 41 on the shaft 42 which carries the drive roll 29 of the sheet feeding tape carrier 26.
  • the auxiliary frame 2 After the auxiliary frame 2 has been adjusted along the main frame 1 toward or ⁇ away from the sheet taking gripper 3 of the cylinder 4, to cut a sheet of the desired length, the 'speeds of the web and the tape carrier are adjusted by a common means so as to keep the speed of the tape carrier just and 9.
  • This common means as a change gear mechanism in the drive for the web feed roll 5, which change gear mechanism includesl the change gears 21, 22, the change gear 21 being mounted on a stationary stud shaft 43 and the change gear 22 being mounted on a stud shaft 44, adjustable along a ⁇ radially elongated slut 45 in a hanger arm 46 ivoted on the shaft 17, the free end of whic arm has a concentric elongated slot 47 through which clamping bolts 48 pass into engagement with a segment 49 on the auxiliary frame 2.
  • the elongated concentric slot 47 provides for the introduction of change gears within a limited range to suit sheets of slightly varying lengths, while the segment 49 is provided with a series of holes 50 so that the hanger arm 46 may be adjusted to different positions to permit the introduction of change gears within a much wider range to suit s eets of greatly var ing lengths.
  • What I claim is 1. Mechanism for feeding a web and cutting sheets therefrom, a sheet feeding mechanism, a sheet taking device, a carriage for the web feeding and cutting mechanisms adjustable toward and away from the sheet taking device along the sheet feeding mechanism, and a common means for varying the speed of the web feeding and cutting mechamsms and the sheet feeding mechanism.l
  • Mechanisms for feeding a web and cutting sheets therefrom a sheet feeding mechanism, a sheet taking device, a carriage for the web feeding and cutting mechanisms adjustable toward and away from the sheet taking device along the sheet feeding mechanism, and a common means for varying the speed of the web feeding and cutting mechanisms and the sheet feeding mechanism, said means including a change gear device.
  • a main frame an endless sheet feeding tape carrier, an auxiliary frame adjustable on the main frame along the endless carrier, web feeding and cutting mechanisms carried by the auxiliary frame, a drive for the web feeding and cutting mechanisms including a change speed device, and a driving connection between the web feeding mechanism and the endless sheet feeding carrier.
  • Web feeding and cutting mechanisms means for varying the speed thereof to cut sheets of varying len hs from the web, and a sheet feeding mec anism driven by said means, whereby the speed of the sheets being fed is varied according to the length of the sheets.
  • Web feeding and cutting mechanisms means including a change speed device for varying the speed ef the web feeding and cutting mechanisms, to cut sheets of varying lengths, and an endless sheet. feedin ta e carrier driven from said means where y t e Speed of the sheets being fed is varied according to the length of the sheets.
  • a rotary sheet taking device traveling at a fixed speed, web feeding and cutting mechanisms, a sheet feeding mechanism and means for varying the speed of the said mechanisms with respect to the speed of the 'sheet taking device for feeding sheets of varying lengths to the sheet taking device.
  • a rotary sheet taking device web feeding and cutting mechanisms, an endless sheet feeding tape carrier, and means for varying the speed of the web :feeding and cuttin mechanism Aand of thel endless carrier wit respect tothe speed of the sheet takin device :foir feeding sheets of varying lengt to 'the sheet taking device.
  • a rotary sheet taking device web feeding and cutting mechanisms, an endless sheet feeding tape carrier, and means including a change speed device for varying the speed of the web feeding and cutting mechanisms and of the endless carrier with respect to the speed of the sheet taking device for feeding sheets of varying lengths to the sheet taking device.

Description

Dec. 27, 1927.
INVENTOR W72 ,4.621%
v BY
ATTORNEYAS Dec. 27, 1927.
H. M. BARBER SHEET FEEDING MEGHANISM Filed Dec. 13. 1923 2 Sheets-Sheet INVENTOR BYv MWL ATTORNEYS Patented Dec. 27, 1 92'7.
UNITED STATES 1,654,158 PATENT OFFICE.
v HOWARD M. BARBER, OF STONINGTON, CONNECTICUT, ASSIGNOR T C. B. COTTRELL SONS COMPANY, OF NEW YORK, N. Y., A' CORPORATION OF DELAWARE.
SHEET-Fiamme Mixer-ramen Application led December 13, 1923. Serial No. 680,437.
In machines for cutting sheets of varying lenvths from a traveling web Where the web feeding and cutting mechanisms are adjustable along the endless sheet feeding carrier toward and away from the rotary sheet talcing device which is traveling at a fixed speed, it has been usual to drive the endless sheet feeding carrier at a fixed speed sulcient to take care of the longest sheet cut from the web, which fixed speed is excessive for shorter sheets cut. from the web.
The object of this invention is to provide means for coincidently adjusting the speed of the endless sheet feeding carrier with the adjustment of the speed of the Web feeding and cutting mechanisms With respect to the fixed speed of the sheet taking device so that different lengths of sheets may7 be fed to the sheet taking device Without distortion. This is particularly desirable Where the sheets are cut and fed from a Web of light Weight and loosely Woven material, such for instance as burlap, and also Where the lengths of the sheets are varied between Wide limits.
A practical embodiment of my invention is represented in the accompanying dravings, in which Fig. 1 represents an elevation looking toward the right side of a web cutting and 3U sheet feeding machine including my improvement.
llfig. 2 represents an elevation looking to vvard the left side of the machine.
ltlig. 3 represents a detail horizontal cross section taken in the plane of the line iIL--TII of Fig. 2.
The main frame of the machine is denoted by 1 and the auxiliary frame which carries the means for feeding the Web and cutting lo the sheets therefrom is denoted by 2, which auxiliary frame 2 is adjustable longitudinally alone' the main frame 1 to different distances from the sheet taking device, to provide for the cutting and feeding of sheets of varying lengths. The sheet taking device is herein shown as a set of grippers 3,
carried by the cylinder 4 which is rotated at a hxed speed from the main drive shaft 14,
through the gears 51, 52. This cylinder 4 may be the impression cylinder of a, printing press.
The web feeding mechanism is herein shown as including the web feed roll 5, the web feed drum 6 and its coacting web feed sa rolls 7. The mechanism for cutting the sheets from the web is shown asA comprising the coactlng rotary and stationary cutting members 8 rotary cutting member 8 is driven from the vertically disposed extensible shaft 11 at one side of the machine through the gears 12, 13. This shaft 11 is driven from the main drive shaft 14 through the bevel gears 15, 16, the shaft 11 having a slidinginterloclied connection with the gear 15 to permit the longitudmal adjustment of the auxiliary frame 2 along the main frame 1 Without disconnecting the geared connection between the main drive shaft 14 and the rotary cutting member cross shaft 10, through the extensible shaft 11.
The cross shaft 17 of the web feed roll 5 1s driven. from the cross shaft 10 of the rotary cutting member 8 through the train of spur gears 18, 19, 20, 21, 22, 23. The web feed drum 6 is driven from the cross shaft 17 through the spur gears 24, 25.
A horizontally arranged sheet feeding tape carrier 26 is carried by the main frame 1 and is arranged to feed the sheets from the cutting mechanism to the sheet taking grippers 3 of the cylinder 4, the tapes of which carrier pass around pulleys 27 at the inner end of the carrier and around the roll 28, the pulleys 29 and the roll 30 at the outer end of the carrier. This sheet feeding tape carrier 26 is driven from the web feed roll cross shaft 17 which carries the gears 23 and 24 as follows:
A longitudinally disposed extensible shaft 31 is driven from the web feed roll cross shaft 17 by the bevel gears 32, 33, the vea-r 32 being slidably interlocked with the shaft 31. to permit the longitudinal adjustment of the auxiliary frame 2 along the main frame 1. This extensible shaft 31 is also provided With a bevel gear 34 which meshes With a bevel gear 35 carried by a shaft 36, which shaft carries a spur gear 37 which forms a part of a train of spur gears 37, 38, 39, 40, leading to the gear 41 on the shaft 42 which carries the drive roll 29 of the sheet feeding tape carrier 26.
After the auxiliary frame 2 has been adjusted along the main frame 1 toward or` away from the sheet taking gripper 3 of the cylinder 4, to cut a sheet of the desired length, the 'speeds of the web and the tape carrier are adjusted by a common means so as to keep the speed of the tape carrier just and 9. The cross shaft l0 of the f sli htl ter than the speed of the sheet beigng yctliea I have shown "this common means as a change gear mechanism in the drive for the web feed roll 5, which change gear mechanism includesl the change gears 21, 22, the change gear 21 being mounted on a stationary stud shaft 43 and the change gear 22 being mounted on a stud shaft 44, adjustable along a` radially elongated slut 45 in a hanger arm 46 ivoted on the shaft 17, the free end of whic arm has a concentric elongated slot 47 through which clamping bolts 48 pass into engagement with a segment 49 on the auxiliary frame 2. The elongated concentric slot 47 provides for the introduction of change gears within a limited range to suit sheets of slightly varying lengths, while the segment 49 is provided with a series of holes 50 so that the hanger arm 46 may be adjusted to different positions to permit the introduction of change gears within a much wider range to suit s eets of greatly var ing lengths.
rom the above description it will be seen that I have provided a common means whereby the speed of the sheet feeding tape carrier can be accurately adjusted at the same time that the speed of travel of the web is adjusted for sheets of varying lengths, such means being very readily introduced without disturbing the other driving connections.
It is evident that various changes ma be resorted to in the form, construction an arrangement of the several parts without departing from the s irit and scope of my invention; hence, I o not wish to be limited to the particular embodiment herein shown and described, but
What I claim is 1. Mechanism for feeding a web and cutting sheets therefrom, a sheet feeding mechanism, a sheet taking device, a carriage for the web feeding and cutting mechanisms adjustable toward and away from the sheet taking device along the sheet feeding mechanism, and a common means for varying the speed of the web feeding and cutting mechamsms and the sheet feeding mechanism.l
2. Mechanisms for feeding a web and cutting sheets therefrom, a sheet feeding mechanism, a sheet taking device, a carriage for the web feeding and cutting mechanisms adjustable toward and away from the sheet taking device along the sheet feeding mechanism, and a common means for varying the speed of the web feeding and cutting mechanisms and the sheet feeding mechanism, said means including a change gear device.
3. Mechanisms for feeding a web and cutting sheets therefrom, a sheet taking device, an endless tape carrier for feeding the sheets to the sheet taking device, a carriage for the web feedin and cuttin mechanisms ad'ustable towar and away rom the sheet ta ing device along the endless carrier, and a common means for varying the speed of the web feeding and cutting mechanisms and the endless carrier.
4. Mechanisms for feeding a web and cutting sheets therefrom, a sheet takin device, an endless tape carrier for feeding t e sheets to the sheet taking device, a carriage for the web feedin and` cutting mechanisms ad'ustable towai and awa from the sheet ta ing device along the end ess carrier, and a common means for varying the speed of the web feeding and cutting mechanisms and the endless carrier, said common means including a change gear device. f
5. A main frame, an endless sheet feeding tape carrier, an auxiliary frame adjustable on the main frame along the endless carrier, web feeding and cutting mechanisms carried by the auxiliary frame, a drive for the web feeding and cutting mechanisms including a change speed device, and a driving connection between the web feeding mechanism and the endless sheet feeding carrier.
6. A main frame, a drive shaft, and an endless sheet feedin tape carrier, an auxiliary frame adjusta le on the main frame along the endless carrier, web feedin and cutting mechanisms carried by the auxiliary frame, a driving connection between the drive shaft and the web cutting mechanism including an extensible and contractible shaft, a driving connection between the web cutting and feeding mechanisms including a change gear device, and a driving connection between the web feeding mechanism and the endless sheet feeding carrier including an extensible andcountractible shaft.
7. Web feeding and cutting mechanisms, means for varying the speed thereof to cut sheets of varying len hs from the web, and a sheet feeding mec anism driven by said means, whereby the speed of the sheets being fed is varied according to the length of the sheets.
8. Web feeding and cutting mechanisms, means including a change speed device for varying the speed ef the web feeding and cutting mechanisms, to cut sheets of varying lengths, and an endless sheet. feedin ta e carrier driven from said means where y t e Speed of the sheets being fed is varied according to the length of the sheets.
9. A rotary sheet taking device traveling at a fixed speed, web feeding and cutting mechanisms, a sheet feeding mechanism and means for varying the speed of the said mechanisms with respect to the speed of the 'sheet taking device for feeding sheets of varying lengths to the sheet taking device.
10. A rotary sheet takin device traveling at a fixed speed, web feeing and cuttin mechanisms, a sheet feeding mechanism, and means including a speed gear device for varying the speed of the said mechanisms lill with respect to the s eed of the sheet taking device for feeding s eets of varying lengths to the sheet taking device.
11. A rotary sheet taking device, web feeding and cutting mechanisms, an endless sheet feeding tape carrier, and means for varying the speed of the web :feeding and cuttin mechanism Aand of thel endless carrier wit respect tothe speed of the sheet takin device :foir feeding sheets of varying lengt to 'the sheet taking device.
12. .A rotary sheet taking device, web feeding and cutting mechanisms, an endless sheet feeding tape carrier, and means including a change speed device for varying the speed of the web feeding and cutting mechanisms and of the endless carrier with respect to the speed of the sheet taking device for feeding sheets of varying lengths to the sheet taking device.
In testimony, that I claim the foregoing as my invention, I have signed my name this 10th day of December, 1923.
HOWARD M. BARBER.
US680437A 1923-12-13 1923-12-13 Sheet-feeding mechanism Expired - Lifetime US1654158A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3015978A (en) * 1956-07-11 1962-01-09 S I B S P A Scipione Innocenti Spring-storage rotary cutting device
US4969862A (en) * 1986-11-26 1990-11-13 Winkler & Duennebier Maschinenfabrik Und Eisengiesserei Gmbh & Co. Kg. Method and apparatus for producing folded articles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3015978A (en) * 1956-07-11 1962-01-09 S I B S P A Scipione Innocenti Spring-storage rotary cutting device
US4969862A (en) * 1986-11-26 1990-11-13 Winkler & Duennebier Maschinenfabrik Und Eisengiesserei Gmbh & Co. Kg. Method and apparatus for producing folded articles

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