US3652084A - Apparatus for separating a stack of flat articles into single articles - Google Patents

Apparatus for separating a stack of flat articles into single articles Download PDF

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Publication number
US3652084A
US3652084A US29913A US3652084DA US3652084A US 3652084 A US3652084 A US 3652084A US 29913 A US29913 A US 29913A US 3652084D A US3652084D A US 3652084DA US 3652084 A US3652084 A US 3652084A
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US
United States
Prior art keywords
stack
opening
article
articles
slit
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
US29913A
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English (en)
Inventor
Jurg Eberle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ferag Fehr and Reist AG
Original Assignee
Ferag Fehr and Reist AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ferag Fehr and Reist AG filed Critical Ferag Fehr and Reist AG
Application granted granted Critical
Publication of US3652084A publication Critical patent/US3652084A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65H3/00—Separating articles from piles
    • B65H3/28—Separating articles from piles by screw or like separators

Definitions

  • a generally round table with a section cut out which table is secured to a drive shaft by a boss.
  • the stack to be separated lies to one side of the boss on the table.
  • the lowermost article in the stack must lie with practically its whole surface on the table.
  • the opening for the respective lowermost article to pass through during rotation in the known apparatus is sector-shaped and generally open to the outside, diverging side edges of the opening being at different heights. This difference in height of the side edges corresponds approximately to the thickness of the articles to be separated, the respective lowermost article in the stack being passed through the opening in the course of one rotation of the table.
  • the known apparatus has disadvantages.
  • This resistance is also large because the size of the bearing surface of the table is almost as large as the area of the stack lying on the table.
  • Another disadvantage is the stress on the holders necessary to keep the stack stationary in respect to the rotating table which are required because of the considerable frictional resistance between table and stack.
  • the table itself and its shaft with the associated bearing is subjected to a considerable strain because of the one-sided loading.
  • the known apparatus occupies a great deal of space because the radius of the table must be at least as large as the width of the articles, i.e., the diameter of the table must be at least as large as the width of the articles to be separated from the stack added to which is the diameter of the boss.
  • FIG. 2 a section through the apparatus shown in FIG. 1 along the line AA;
  • FIGS. 3a-3d show sections through the apparatus shown in FIG. 1 along the line B-B at different stages in time, namely: when points marked a-d on the table in FIG. 1 lie in a fixed line marked B-B during rotation of the table;
  • FIGS. 4 and 5 show details of a bearing and drive system for the table on a larger scale in cross section along the lines C-C and DD in FIG. I;
  • FIGS. 6a-6d are plan views of various sequential positions of the articles to be separated with respect to the position of rotation of the table.
  • the apparatus comprises a revolving table 1 on which there rests a stack 3 of flat articles 5.
  • a section of the contour of the opening 2 which on rotation of the table 1 approaches one side of the stack forms an approaching edge 8 of the'opening 2 for releasing an edge of the lowermost article 5 to be separated.
  • One of the holders in the form of an angle rail e.g., the holder 23b, may be adjustable so that the apparatus can be used to separate a stack of articles which are smaller in size, e.g., as depicted by the dash-dot line 25 (FIG. 1).
  • Means for gripping the article to be separated from the stack and introduce it into the opening may be of various kinds.
  • One possibility is to provide a blade 9 which is pivotally and adjustably linked to the approaching edge 8. This blade 9 is elastically pretensioned towards the carrying side of the table 1.
  • This gripping device may either be a mechanical gripping arm 10 (FIGS. 1, 2, and 3) or alternatively a suction device (not depicted).
  • FIG. 2 depicts a cross section through the disc 13 of the table 1 together with articles 5 piled in the stack 3, the cross section being along the line A-A in FIG. 1.
  • the gripping device is shown as the arm 10.
  • a gripping rod 11 of this gripping arm 10 has at its free end a finger 12, the purpose of which is to grip the respective lowermost article 5, whilst the other end of the gripping rod 11 is connected to a drive system not depicted.
  • the drive moves the gripping arm in the axial direction of the gripping rod 1 1 with reciprocating motion and brings the engaging arm 10 into engagement with the article 5 to be separated.
  • the gripping arm 10 is shown in its lowermost position when it has drawn the edge 24 of the lowermost article 5 through the slit 7 and is still in engagement with this edge 24 when drawn through.
  • the curved tongue 20 is formed with an inclined surface 26 at the inner side thereof, the purpose of which is to ease the passage of the flat object 5 through the opening 2 as the disc 13 continues to rotate.
  • the gripping arm 10 is in its lowermost position and is in engagement with the side edge 24 of the lowermost article 5 to be separated (FIG. 3a).
  • the edge 24 of the lowermost article 5, i.e., the article nearest the disc 13, is bent downwards and drawn through the opening 2.
  • FIG. 6a shows the table 1 in its initial position in which only part of the edge 24 of the article 5 is drawn through the opening 2 in the table 1 and is held below the latter by the blade 9.
  • the stack is held stationary by the holders 22, 23a, 23b just as before.
  • FIGS. 6b and 60 it can be seen that the connecting slit 4 extends from the axis of rotation of the table 1 for such a distance that the corners of the article to be separated 5 can pass through the opening 2 without any contact with the outside edge 27 of the connecting slit 4.
  • FIG. 6d shows the article, almost released, lying almost entirely on the other side of the table. Only a small remaining part of one edge of this article 5 is still supported by the holder 22.
  • Apparatus for separating single flat articles from a stack of such articles which comprises a table having an upper side for supporting said stack in a predetermined position thereon and a lower side, said table being rotatable about an axis under a supported stack and being provided with an opening leading from said upper side to said lower side and of a contour which embraces said axis and intersects the base outline of the supported stack in at least two points regardless of the rotational position of the table relative to the stack;
  • gripping means for introducing a side edge of the lowermost article in said stack into said opening in the table from the upper side thereof when said leading edge is approaching the base outline of said stack;
  • holder means for positioning said stack in said predetermined position on said table and for preventing rotation of said stack while the table is rotating.
  • the opening is in the form of a central hole which is concentrically surrounded by a ring-sector slit, there being a connecting slit which extends from the hole through the end of the ring-sector slit and radially outwards therefrom.
  • said gripping means is a blade pivotally linked to the table at the periphery of the opening, the blade being elastically pretensioned toward the stack supporting side of the table and being adapted to guide the respective article to be separated into the opening.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • De-Stacking Of Articles (AREA)
US29913A 1969-04-29 1970-04-20 Apparatus for separating a stack of flat articles into single articles Expired - Lifetime US3652084A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH652369A CH493398A (de) 1969-04-29 1969-04-29 Vorrichtung zum Vereinzeln eines Stapels flacher Gegenstände

Publications (1)

Publication Number Publication Date
US3652084A true US3652084A (en) 1972-03-28

Family

ID=4310947

Family Applications (1)

Application Number Title Priority Date Filing Date
US29913A Expired - Lifetime US3652084A (en) 1969-04-29 1970-04-20 Apparatus for separating a stack of flat articles into single articles

Country Status (6)

Country Link
US (1) US3652084A (de)
CH (1) CH493398A (de)
DE (1) DE2008888A1 (de)
GB (1) GB1253481A (de)
NL (1) NL7005595A (de)
SE (1) SE356019B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4383683A (en) * 1979-10-06 1983-05-17 Rahdener Maschinenfabrik August Kolbus Apparatus for separating the bottom sheet of a stack or sheets
US4439100A (en) * 1980-12-08 1984-03-27 Fichtner Karl Heinz Device for separating and taking off of sheets from a stack
CN108639769A (zh) * 2018-07-05 2018-10-12 漳州盈塑工业有限公司 刀片自动分离设备

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3629491A1 (de) * 1986-08-29 1988-03-03 Schneider Gmbh & Co Verfahren und vorrichtung zum vereinzeln von papierbloecken aus einem stapel
DE4028513A1 (de) * 1990-09-07 1992-03-12 Geimuplast Mundt Kg Peter Verfahren und vorrichtung zum vereinzeln uebereinander gestapelter flacher gegenstaende, insbesondere diapositiv-raehmchen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2731271A (en) * 1952-07-14 1956-01-17 Robert N Brown Combined dealer, shuffler, and tray for playing cards
US3109642A (en) * 1958-11-21 1963-11-05 Seary Mfg Company Apparatus for folding transparency mounts

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2731271A (en) * 1952-07-14 1956-01-17 Robert N Brown Combined dealer, shuffler, and tray for playing cards
US3109642A (en) * 1958-11-21 1963-11-05 Seary Mfg Company Apparatus for folding transparency mounts

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4383683A (en) * 1979-10-06 1983-05-17 Rahdener Maschinenfabrik August Kolbus Apparatus for separating the bottom sheet of a stack or sheets
US4439100A (en) * 1980-12-08 1984-03-27 Fichtner Karl Heinz Device for separating and taking off of sheets from a stack
CN108639769A (zh) * 2018-07-05 2018-10-12 漳州盈塑工业有限公司 刀片自动分离设备

Also Published As

Publication number Publication date
GB1253481A (en) 1971-11-17
NL7005595A (de) 1970-11-02
CH493398A (de) 1970-07-15
SE356019B (de) 1973-05-14
DE2008888A1 (de) 1970-11-12

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