US3586316A - Apparatus for feeding sheets,blanks and the like - Google Patents

Apparatus for feeding sheets,blanks and the like Download PDF

Info

Publication number
US3586316A
US3586316A US864014A US3586316DA US3586316A US 3586316 A US3586316 A US 3586316A US 864014 A US864014 A US 864014A US 3586316D A US3586316D A US 3586316DA US 3586316 A US3586316 A US 3586316A
Authority
US
United States
Prior art keywords
sucker
suction
rocking
pile
suckers
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
US864014A
Other languages
English (en)
Inventor
Gunter Ehlscheid
Ernst Meess
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3586316A publication Critical patent/US3586316A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
    • B65H3/48—Air blast acting on edges of, or under, articles
    • 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
    • B65H3/08—Separating articles from piles using pneumatic force
    • B65H3/0808—Suction grippers
    • B65H3/085—Suction grippers separating from the bottom of pile
    • B65H3/0858—Suction grippers separating from the bottom of pile this action resulting merely in a curvature of each article being separated
    • B65H3/0866—Suction grippers separating from the bottom of pile this action resulting merely in a curvature of each article being separated the final separation being performed between rollers

Definitions

  • An apparatus used for feeding sheets, blanks l l Germany and the like from beneath a pile into a converting or l l P 09 376-0 processing machine, particularly a machine for making envelopes and the like, includes a middle rocking sucker engaging the bottom sheet of a pile and side suckers which rock [Sill FEEDING SHEETS BLANKS along with the middle sucker.
  • the apparatus is particularly 4 Cl 7D characterized in that a separate control member is provided aims rawmg for the side suckers. This control member controls the start of [52] US. Cl 271/29 the suction of the side suckers with a time delay with respect [5 l 1 Int. Cl B65h 3/08 to the start of suction of the middle sucker and causes the suc- [50] Field of Search 271 I29, 23, tion of the side suckers to end simultaneously with the end of 32, 19, 2 suction of the middle sucker.
  • PATENTEDJUNZBIQH I 3586316 sum 1 or 3 Inventor: 6'. ffilscfzeicl M E. Me ass Isa ATTORNGHS PATENIEU Juu22
  • This invention relates to an apparatus for individually feeding sheets, envelope blanks and the like (hereinafter referred to as sheets) made of paper or other suitable material from beneath a pile of such sheets.
  • German Pat. No. 537,189 describes an apparatus of this type in which a rocking sucker engaging the bottom sheet of the pile near its front edge and connected to or separated from a suction air pipe in time with its rocking movements cooperates with rotating feed segments in order to feed each sheet brought by the sucker into the region of the feed segments, into a processing machine from beneath a pile of sheets.
  • German Pat. No. 836,431 describes additionally that pile supports may be located laterally beside the sucker and caused to carry out a rocking movement. The remainder of the pile situated above the bottom sheet is then supported beneath its front edge while the bottom sheet is guided downwardly by the rocking sucker.
  • the same patent describes the rocking pile supports as consisting of blower nozzles which just before the beginning of the withdrawal of the bottom sheet by the feed segments blow controlled air between the bottom sheet and the next sheet situated thereabove in order to prevent the sheet above the bottom sheet from being entrained.
  • German Pat. No. 1,238,319 describes additionally a tongue which rocks above the sucker in time therewith and which penetrates into the gap formed by the sucker between the bottom sheet which is bent down at its front edge, and the next sheet thereabove, and holds back the latter sheet on the subsequent downward movement of the sucker with the sheet attached thereto. This construction ensures that the rocking sucker will supply only a single sheet to the feed segments.
  • German Pat. specification No 1,270,941 describes a construction wherein the suction nozzle of the sucker is hollowed out at its top side contacting the sheet, so that the bottom sheet is drawn into this cavity of the suction nozzle during the suction operation. This prevents the rocking sucker from bending simultaneously two sheets downwardly at their front edges and supplying them both together to the feed segments. Blanks for envelopes or the like, which frequently adhere to one another at their cut edges are reliably separated by a hollowed suction nozzle of this type, and it is not possible to obtain this effect reliably simply by bending the sheets downwards with a sucker having a flat suction nozzle.
  • An object of the present invention is to eliminate the drawbacks of prior art devices.
  • an apparatus comprising a plate bearing or supporting a pile of sheets, a rocking sucker which engages the bottom sheet of the pile approximately in the middle and near its front edge projecting beyond the plate, said sucker being periodically connected to or separated from a suction air pipe, and comprising a suction nozzle which is hollowed out at its top which contacts the sheet, a tongue which rocks in time with the sucker and penetrates into the gap formed by the sucker between the bottom sheet and the next sheet situated thereabove, rocking pile supports constructed as blower nozzles and disposed laterally beside the sucker and the tongue, rotating feed segments for drawing the sheet brought into the range thereof by the sucker from beneath the pile, and additional suckers, each disposed on one side of the middle rocking sucker and rocking in time therewith and engaging beneath the bottom sheet, whereby a separate control member is provided for the side suckers and controls the start of the suction of the side suckers with a time delay with respect to the start of the suction
  • the middle rocking sucker whose suction nozzle is hollowed out at its top contacting the bottom sheet has associated with it a tongue rocking in time therewith for separating the sheet drawn into the suction nozzle cavity from the net sheet thereabove.
  • the lateral rocking suckers have no such tongues associated with them. They contact the bottom sheet only lightly near its front edge. Since their suction operation begins after the suction of the middle sucker, the bottom sheet can be sucked without obstruction into the cavity of the suction nozzle of the middle rocking sucker. The actual separation of the bottom sheet from the part of the pile thereabove is thus carried out solely by the middle rocking sucker and its associated rocking tongue.
  • the middle rocking sucker and its associated rocking tongue may have a stationary blower nozzle associated therewith, such nozzle blowing air for a short period into the gap above the bottom sheet formed by the suction nozzle, the blown air being controlled in time with the rocking sucker, so that the sheet above the bottom sheet is forced upwardly.
  • a stationary blower nozzle associated therewith, such nozzle blowing air for a short period into the gap above the bottom sheet formed by the suction nozzle, the blown air being controlled in time with the rocking sucker, so that the sheet above the bottom sheet is forced upwardly.
  • One and the same rotary valve is advantageously used as the control member for this blown air and for the suction air for the lateral rocking suckers.
  • the system according to the present invention is particularly suitable for feeding blanks for relatively wide envelopes, in which the flap situated at the front in the direction of feed is recessed in the center and hence recedes with respect to the lateral parts of the front edge. It was hitherto very difficult to feed such blanks with known systems and these difficulties are eliminated by the system according to the present invention.
  • FIG. 1 is a section through the apparatus of the present invention along the line ll-I-I in FIG. 2 at the start of the downward movement of the rocking suckers;
  • FIG. 2 is a section through the apparatus along the line ll-ll in FIG. 1;
  • FIG. 3 is a section through the apparatus similar to that of FIG. 1, but illustrates the apparatus at the end of the downward movement of the rocking suckers;
  • FIG. 4 is a longitudinal section through the common control member for the blown air and the suction air;
  • FIG. 5 is a side elevation of the control member for the blown air and the suction air in the direction of the arrow A in FIG. 4;
  • FIG. 6 is a longitudinal section through the suction nozzle of the middle sucker on an enlarged scale.
  • FIG. 7 is a section through the middle sucker along the line VII-VII in FIG. 6.
  • the apparatus shown in FIGS. l-3 includes a plate 1 which carries a pile of sheets S and the front edge 1 of which is bent downwardly.
  • the pile S projecting beyond the front edge 1' of the plate is held in the correct position by stops 3.
  • Cross members 2 fixed to the plate 1 secure it to the machine sidewalls 4.
  • a shaft 5 with feed segments 6 secured thereto is mounted rotatably in the machine sidewalls.
  • Rubber rollers 8 are mounted on a shaft 7 and cooperate with feed segments 6.
  • a retainer 15 for a tongue 16 is rotatably mounted on the shaft 12 and is controlled by a rod or bar 15 independently of the angular rotation of the shaft 12.
  • the shafts 9 and 12, and the tongue 16 are intermittently vibrated or oscillated in known manner (not shown) by cams or the like rotating in time with the feed.
  • the middle sucker 10 has a suction nozzle 17 which is hollowed out at the top and which has suction apertures 18 receiving suction air through the hollow shaft 17 and a longitudinal bore 20 in the shaft 9, the suction air being controlled in time with the feed.
  • Each of the side suckers 11 has a suction nozzle 21 with a suction aperture 22.
  • Their retainers 23 are also clamped on the shaft 9.
  • the side suckers and their suction apertures 22 receive suction air through hoses 24 and a control member 25 rotating with the shaft 14, the air being controlled in time with the feed, the air supply being independent of the air supply to the sucker 10.
  • Each of the pile supports 13 has a shoe 26 which engages beneath the pile S and which has an air slot 27.
  • the supports are mounted rigidly in retainers 28 secured to the shaft 112 and receive blown air through a longitudinal bore 29 in the shaft 12, the air being controlled in time with the feed and penetrating, when the pile supports are in the position shown in FIG. 3, through the air slot 27 between the sheet B drawn down by the oscillating suckers 10, 11, and the part of the pile situated above the sheet B.
  • a stationary blower nozzle 30 is located and is secured in a manner not shown.
  • the blower 30 is slightly spaced from the front bottom edge of the pile of sheets S, so that it blows air exactly into the gap between the bottom sheet of the pile sucked up by the suction nozzle 17 of the middle rocking sucker 10 and the net sheet situated thereabove, before the tip of the tongue 16 penetrates into the gap.
  • the blower 30 is connected to the control member 25 by a hose 31.
  • the control member 25 comprises a rotating disc 32 which is secured against rotation on the shaft 14 by a screw 33, and two nonrotating side parts 34, 35 rotatably mounted on the shaft 14 and secured against longitudinal displacement thereon by rings 36.
  • Each of the two side parts 34, 35 has a forked stop 37 with longitudinal slots 37 for fixing screws 38, which engages over a bolt 45 secured in the sidewall 4 and prevents the side parts 34, 35 from moving with the shaft 14.
  • Two ducts 39, 40 are provided in the flat side of the side part 34 adjacent the disc 32; they have the shape of arcs of a circle and are situated on the same radius. Opposite them are corresponding ducts 39, 40' in the flat side of the side part 35.
  • Spigots 41, 41 lead from outside into the ducts 39, 39', respectively, which are used to control the suction air of the rocking side suckers 11, while spigots 42, 42 lead into the ducts 40, 40, respectively, which are used to control the blown air of the blower nozzle 30.
  • Spigot 41 is connected by hose 43 to the machine suction line, while spigot 41 is connected by two hoses 24 to the two side suckers 11.
  • Spigot 42 is connected by a hose 50 to the machine blown air line, while spigot 41 is connected by hose 31 to the blower nozzle 30.
  • the disc 32 rotating with the shaft 14 is provided with an aperture 44 which alternately interconnects the registering air ducts 39, 39 and 40, 40 respectively, for as long as it registers with these air ducts on rotation of the disc 32.
  • the lengths of the arcs of these air ducts correspond to the required suction time for the side rocking suckers 11 and the blowing time of the blower nozzle 30.
  • a slot 46 is provided in the side part 35 just after the rear end of the air duct 39 as considered in the direction of rotation of the disc 32; the slot 46 leads outwards and through it air from the exterior flows for a short time into the air duct 39 through the aperture 44 in the rotating disc 32, so that the suckers l 1 release the sucked-in sheet.
  • the control member (not shown) for the middle rocking sucker 10 is advantageously constructed in the same manner. Displacement of the forked stops 37 in the region of the slots 37 after the screws 38 have been released, provides an accurate adjustment of the time when the suction of the suckers l 1 starts with respect to the time when the suction of the middle sucker starts.
  • a full working cycle of the system comprises the following stages:
  • the tongue 16 pivots into the gap between the bottom sheet and the next sheet thereabove and thus separates the bottom sheet from the remainder of the pile.
  • the blower nozzle 30 is separated from the blown air supply by the control element 25.
  • the suckers 11 which are still in their position shown in FIG. ll, receive suction air through the air ducts 39, 39' and also suck the bottom sheet B with a time delay. The downward movement of the suckers 10, 11, together with the bottom sheet held by them, then starts.
  • the rocking suckers l0, 11 are simultaneously separated from the suction air pipe.
  • the feed segments 6 take over the sheet B which has been brought into their range by the rocking suckers, and draw it, in cooperation with the rollers 8, around the rounded front edge 1 of the plate 1 beneath the pile, while the pile supports 13 blow air.
  • the feed segments 6 engage the sheet B near its front end first of all by their engagement edge 47 which presses against the rollers 8, and as they continue to rotate they hold it by suction apertures 48 which receive periodically controlled suction air through a longitudinal bore 49 in the shaft 5.
  • the feed segments 6 then pass the sheet to a following roller (not shown) of the processing or converting machine.
  • An apparatus for feeding sheets from beneath a pile of sheets comprising a plate for carrying said pile, a rocking middle sucker having a suction nozzle which is hollowed out at its top and which is adapted to contact the bottom sheet of the pile, whereby said bottom sheet is engaged approximately in the middle and near its front edge projecting beyond the plate, a suction air pipe, means connecting said sucker to said suction air pipe and periodically supplying suction to said sucker and then ending this supply of suction, a rocking tongue, said tongue rocking in time with the sucker and being adapted to penetrate between the bottom sheet drawn by the sucker and the next sheet of the pile, rocking pile supports consisting of blower nozzles and located laterally beside said sucker and said tongue, rotating feed segments for drawing the bottom sheet brought by the sucker, two additional rocking side suckers located on opposite sides of said middle sucker and rocking in time therewith, said side suckers being adapted to engage beneath the bottom sheet, and a separate control member connected with said side suckers and a suction
  • An apparatus in accordance with claim 1, comprising a stationary blower nozzle associated with said middle sucker.
  • control member is connected with said stationary blower nozzle for controlling both the suction air of said side suckers and the blowing air of said stationary blower nozzle.
  • control member constitutes a rotary valve and comprises a rotary middle part and two stationary side parts located on opposite sides of said middle part, each of said side parts having two separate arcuate air ducts, said middle part having an aperture for intermittently connecting said air ducts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Making Paper Articles (AREA)
US864014A 1968-11-16 1969-10-06 Apparatus for feeding sheets,blanks and the like Expired - Lifetime US3586316A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681809376 DE1809376B2 (de) 1968-11-16 1968-11-16 Vorrichtung zum einziehen von blaettern zuschnitten oder dergleichen unter einem stapel hinweg in eine verarbeitungs maschine insbesondere eine maschine zum herstellen von brief umschlaegen oder dergleichen

Publications (1)

Publication Number Publication Date
US3586316A true US3586316A (en) 1971-06-22

Family

ID=5713556

Family Applications (1)

Application Number Title Priority Date Filing Date
US864014A Expired - Lifetime US3586316A (en) 1968-11-16 1969-10-06 Apparatus for feeding sheets,blanks and the like

Country Status (3)

Country Link
US (1) US3586316A (enrdf_load_stackoverflow)
DE (1) DE1809376B2 (enrdf_load_stackoverflow)
GB (1) GB1287904A (enrdf_load_stackoverflow)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3806114A (en) * 1972-11-20 1974-04-23 Ato Inc Pneumatic picker
US4275877A (en) * 1979-10-03 1981-06-30 Xerox Corporation Interrupted jet air knife for sheet separator
US4542895A (en) * 1983-01-07 1985-09-24 Winkler & Dunnebier Maschinenfabrik Und Eisengiesserei Gmbh & Co. Kg Separator plates for rotating feed segments of a sheet feeder
US5116040A (en) * 1990-04-06 1992-05-26 De La Rue Giori S.A. Sheet-feeder
US5535998A (en) * 1993-04-16 1996-07-16 Kolbus Gmbh & Co. Kg Sheet separation method and apparatus
US6015145A (en) * 1997-11-03 2000-01-18 Hartel; Siegfried Separator guide for Z-folded sheets
US6155554A (en) * 1997-11-10 2000-12-05 F. L. Smithe Machine Company, Inc. Multiple action shovel feed mechanism for stacked sheets
US6206361B1 (en) * 1998-05-27 2001-03-27 Kolbus Gmbh & Co. Kg Device for separating blanks
US6550388B2 (en) 2000-12-06 2003-04-22 Creo Products Inc. Apparatus and method for removing a thin deformable sheet
US6623000B2 (en) 2001-06-15 2003-09-23 Prim Hall Enterprises Inc. Apparatus and method for separating sheet material by means of a reciprocating disk separator
US6634635B2 (en) * 2001-01-31 2003-10-21 Heidelberger Druckmaschinen Ag Lift hook for a sheet separating device
US6659448B2 (en) * 2001-10-30 2003-12-09 Heidelberger Druckmaschinen Ag Adjustable separator for a sheet separating device
US6698749B2 (en) * 2000-10-05 2004-03-02 Grapha-Holding Ag Device for feeding folded or unfolded signatures to a production line
US20050218580A1 (en) * 2004-03-30 2005-10-06 Noll Harry C Jr Product separator and feeder

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5231222Y2 (enrdf_load_stackoverflow) * 1971-05-24 1977-07-16
DE3070025D1 (en) * 1979-10-03 1985-03-07 Xerox Corp Bottom sheet separator-feeder
DE4218203A1 (de) * 1992-06-03 1993-12-09 Kolbus Gmbh & Co Kg Vorrichtung zum Vereinzeln von Bogen aus einem Stapelmagazin

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3806114A (en) * 1972-11-20 1974-04-23 Ato Inc Pneumatic picker
US4275877A (en) * 1979-10-03 1981-06-30 Xerox Corporation Interrupted jet air knife for sheet separator
US4542895A (en) * 1983-01-07 1985-09-24 Winkler & Dunnebier Maschinenfabrik Und Eisengiesserei Gmbh & Co. Kg Separator plates for rotating feed segments of a sheet feeder
US5116040A (en) * 1990-04-06 1992-05-26 De La Rue Giori S.A. Sheet-feeder
US5535998A (en) * 1993-04-16 1996-07-16 Kolbus Gmbh & Co. Kg Sheet separation method and apparatus
US6015145A (en) * 1997-11-03 2000-01-18 Hartel; Siegfried Separator guide for Z-folded sheets
US6155554A (en) * 1997-11-10 2000-12-05 F. L. Smithe Machine Company, Inc. Multiple action shovel feed mechanism for stacked sheets
US6206361B1 (en) * 1998-05-27 2001-03-27 Kolbus Gmbh & Co. Kg Device for separating blanks
US6698749B2 (en) * 2000-10-05 2004-03-02 Grapha-Holding Ag Device for feeding folded or unfolded signatures to a production line
US6550388B2 (en) 2000-12-06 2003-04-22 Creo Products Inc. Apparatus and method for removing a thin deformable sheet
US6634635B2 (en) * 2001-01-31 2003-10-21 Heidelberger Druckmaschinen Ag Lift hook for a sheet separating device
US6623000B2 (en) 2001-06-15 2003-09-23 Prim Hall Enterprises Inc. Apparatus and method for separating sheet material by means of a reciprocating disk separator
US6659448B2 (en) * 2001-10-30 2003-12-09 Heidelberger Druckmaschinen Ag Adjustable separator for a sheet separating device
US20050218580A1 (en) * 2004-03-30 2005-10-06 Noll Harry C Jr Product separator and feeder
EP1582488A3 (en) * 2004-03-30 2006-03-29 Graphic Management Associates, Inc. Product separator and feeder
US7384031B2 (en) 2004-03-30 2008-06-10 Graphic Management Associates, Inc. Product separator and feeder

Also Published As

Publication number Publication date
GB1287904A (enrdf_load_stackoverflow) 1972-09-06
DE1809376A1 (de) 1970-06-04
DE1809376B2 (de) 1971-07-29

Similar Documents

Publication Publication Date Title
US3586316A (en) Apparatus for feeding sheets,blanks and the like
US3952651A (en) Sheet feeding apparatus for printing machines
US3482833A (en) Sheet feeder assembly
US2108702A (en) Automatic sheet feeding machinery
US2449690A (en) Mechanism for feeding sheets of stiff fibrous material
US2317993A (en) Sheet feeder
US2827290A (en) Vacuum feed
US3523685A (en) Apparatus for feeding blanks or sheets
US2236363A (en) Sheet feeding machine
US3588095A (en) Suction table system for feeding of warped sheets
US2133726A (en) Sheet feeder
JPS59133132A (ja) Ｖ字形に切除された前縁を有する断裁片を断裁片パイルから個別的に分離する装置
US3588093A (en) Suction feeder bar for warped sheets
US747395A (en) Feeder.
US2328943A (en) Means for registering sheets
US2159147A (en) Sheet feeding apparatus
US1898535A (en) Method of and means for feeding paper sheets
US2643121A (en) Sheet feeding apparatus
US1736340A (en) Paper-feeding machine
US1646230A (en) Feeding device
US1134822A (en) Front-registering mechanism.
US1098234A (en) Paper-feeding machine.
US1998337A (en) Folding machine
US2599602A (en) Mechanism for registering sheets
US3949980A (en) Metering means for blanks