US3633903A - Sheet-transporting assembly - Google Patents

Sheet-transporting assembly Download PDF

Info

Publication number
US3633903A
US3633903A US1119A US3633903DA US3633903A US 3633903 A US3633903 A US 3633903A US 1119 A US1119 A US 1119A US 3633903D A US3633903D A US 3633903DA US 3633903 A US3633903 A US 3633903A
Authority
US
United States
Prior art keywords
suction
grid
sheet
wires
conveyor
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
US1119A
Other languages
English (en)
Inventor
Joseph E Foster Jr
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 US3633903A publication Critical patent/US3633903A/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
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/26—Delivering or advancing articles from machines; Advancing articles to or into piles by dropping the articles
    • B65H29/32—Delivering or advancing articles from machines; Advancing articles to or into piles by dropping the articles from pneumatic, e.g. suction, carriers
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/40—Extraction of image or video features
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/40—Extraction of image or video features
    • G06V10/44—Local feature extraction by analysis of parts of the pattern, e.g. by detecting edges, contours, loops, corners, strokes or intersections; Connectivity analysis, e.g. of connected components
    • G06V10/457—Local feature extraction by analysis of parts of the pattern, e.g. by detecting edges, contours, loops, corners, strokes or intersections; Connectivity analysis, e.g. of connected components by analysing connectivity, e.g. edge linking, connected component analysis or slices

Definitions

  • PATENTEDJAN 1 1912 31533903 sHmuuFe
  • This invention relates in general to the paper-converting industry and more particularly is directed to a sheet-transporting assembly finding utility in stacking previously die-cut and stripped cardboard stock.
  • the present invention is designed for use in the paper-converting industry in the cutting and creasing operations. It is present practice to employ automatic cutting and creasing machines to cut and crease paper stock from one tenthousandth to one hundred-thousandth of an inch in thickness. These machines deliver the paper stock automatically in skid loads approximately 4 to 5 feet in'height with the die-cut waste portions still attached.
  • the machine is capable of handling 4,000 previously die-cut and stripped sheets per hour without requiring setup.
  • the machine is unique in that it is not necessary to orient or time the die-cut sheets to the machine in order to remove the waste portions of the sheet and to stack them on a skid in an even pile in the order in which they were cut.
  • Applicant is aware of no other prior art devices designed for and capable of automatically and continuously stripping the waste from die-cut cardboard stock and transporting the stripped sheets for stacking upon pallets.
  • Prior art cardboard stock handling machines have utilized suction conveyors to transport the sheets from one location to another. Such devices generally function as designed and are suitable for the use intended.
  • prior art machines have incorporated mechanisms either to intermittently stop the conveyor or the suction fans in order to deposit the transported sheets at the desired terminal location.
  • the intermittent starting and stopping of the equipment necessarily limits the speed of the operation and in addition, causes increased maintenance expenditures due to mechanical wear of the moving parts.
  • prior art cardboard stock handling machinery required normal adjustment and considerable setup time to compensate for cardboard stock of different sizes. The additional setup time and workers time required in order to accommodate sheets of different sizes has resulted in greatly increased handling costs during normal operating periods.
  • the instant device seeks to overcome the shortcomings of prior art machines by providing a means and method of transporting paper stock from one location to another across the machine in a continuous manner without interruption or stoppage of the operating cycle.
  • means have been provided to automatically separate the cardboard stock from the suction conveyor while the conveyor continuously moves and to deposit the die-cut and stripped sheets upon an elevating pallet capable of continuously descending in response to automatic signals monitoring the height of the pile of blanks deposited thereon.
  • a unique cardboard blank separating grid system comprising a plurality of wires passing through the suction conveyor and capable of reciprocal motion therethrough at right angles to the plane of operation of the conveyor functions to disassociate the cardboard blanks from the conveyor at a predetermined location without interruption to or interference with the continuous operation of the suction conveyor.
  • It is another object of the instant invention to provide a novel, sheet-transporting assembly including in one machine the operations of vibrating cardboard blanks, removing waste portions from previous die-cut operations, transporting the said die-cut and stripped sheets upon a continuous suction conveyor and depositing said sheets upon a descending pallet elevator system.
  • FIG. 1 is a right front perspective view of the device showing the stripping mechanism and suction and pressure chambers.
  • FIG. 2 is a rear perspective view of the assembly showing the descending pallet elevator system.
  • FIG. 3 is a partial cross-sectional view taken along line 33 of FIG. I looking in the direction of the arrows and showing generally the front half of the machine.
  • FIG. 3a is a partial cross-sectional view taken along line 3- 3 of FIG. 1, showing generally the rear half of the machine and continuing the view of FIG. 3.
  • FIG. 4 is a partial, cross-sectional view similar to FIG. 3a showing the grid system in lower position.
  • FIG. 5 is a top plan view of a perforated suction box.
  • FIG. 6 is a cross-sectional view taken along line 66 of FIG. 4, looking in the direction of the arrows.
  • FIG. 7 is a cross-sectional view taken along line 7-7 of FIG. 5, looking in the direction of the arrows.
  • FIG. 8 is a left front perspective view of the device.
  • FIG. 9 is a detail view of the perforated suction box.
  • the device consists generally of a vibrating and stripping section generally designated A wherein previously die-cut cardboard blanks 14 are fed by the cutter and creaser (not shown) toward the impactor 12 for vibrating the waste portions free from the blank as will hereinafter be more fully set forth.
  • the stripped blank 14 then travels across the machine upon the underside of the suction conveyor system generally designated B.
  • the suction conveyor system B integrally incorporates the vertically reciprocating grid system C which functions to precisely separate the previously stripped blanks from the suction conveyor system B and to deposit the blanks upon a pallet carried by a descending pallet elevator system herein generally designated D.
  • the impactor 12 rotates at 3000 r.p.m. for optimum results.
  • the impactor is constructed of square cross-sectional configuration and thereby provides four striking surfaces each revolution. It is therefore seen that the impactor is capable of striking the cardboard blanks 14 at a rate of 12,000 times per minute when rotating at optimum speed.
  • US. Pat. No. 3,270,929 it can be appreciated that the forward edge of the blank 14 vibrates freely upon contact with the impactor 12 after it feeds through the intake rollers 16, 18.
  • the trailing edge of the blank 14 vibrates freely due to the contacts of the impactor 12 when the forward edge of the blank 14 feeds into the nip of the upper and lower discharge rollers 24, 26.
  • the combination of the vibrating action of the sheet itself and the force of the multiple rotary blows of the impactor cooperate to shake the die-cut scrap sections 36 free from the usable portions of the blank sheet 14.
  • the lower blower 34 receives its suction through the waste removal chamber 38 and serves as a vacuum-cleaning operation in cooperation with the impactor 12.
  • waste particles 36 which are vibrated free by the operation of the impactor l2 and the vibrating action of the leading and trailing edges of the blanks 14 as they pass respectively between the rollers l6, 18, 24, 26 are pulled by the vacuum of the lower blower 34 through the waste removal chamber 38 for ultimate disposal at the fan discharge 40.
  • a motor 42 powers the lower blower 34 through a conventional drive 44 in a well-known manner.
  • the blank 14 travels rearwardly out of the vibrating and stripping section Av under impetus of the upper and lower discharge rollers 24, 26 through the lower roller 46 and upper segmented skate roller 48 which cooperate to drive the stripped blanks onto the suction conveyor system B.
  • the suction conveyor rolls 52, 54 are rotatively carried respectively on the shafts 56, 58 which are journaled through the right and left machine supports 64, 66 and rotate affixed sprockets for chain drive purposes.
  • the driving motor 60 functions to rotate the suction conveyor 50 which is trained about the roll-affixed sprockets through a chain drive 70.
  • the chain drive 70 operatively connects to a direct-connected driving gear 62 and to a driven gear 68 which may be pinned or otherwise affixed to the end of the leading suction roll shaft 56 in the usual manner.
  • the suction conveyor 50 comprises an endless chain rotating about the leading and trailing suction rolls 52. 54 and includes a plurality of horizontally juxtaposed, elongated, perforated, transverse, suction boxes 72 which are operatively affixed to the supporting conveyor links 74 as required for longitudinal and rotative motion with respect to the stripping machine 10.
  • Each suction box 72 comprises a plurality of transverse segments 76 joined together through the longitudinal, arched junctions 78 which rise above the floor of each segment to provide a plurality of spaced, longitudinal, grid-receiving slots 80.
  • the floor 82 of each segment 76 is drilled or otherwise provided with a plurality of openings 84 as hereinafter will be more fully set forth.
  • Each suction box 72 is substantially channel-shaped in cross section having the openings 84 drilled through the web section between the right and left flanges 86, 88.
  • Each segment 76 is preferably provided with five suction openings 84 of elevensixteenths inch diameter each and arranged in a cross pattern for optimum operating efficiency.
  • Fans 96 overly the medial portion of the suction conveyor 50 and are powered through a belt drive 92 by the electrical motor 30 in well-known manner.
  • the fans 96 draw their suction directly through the multiple openings 84 provided in the suction boxes 72 and thus create sufficient suction pressure to attract and carry the cardboard blanks 14.
  • the fans discharge directly upwardly through a discharge plenum 98 through operatively affixed suction control louvers 100.
  • the louvers 100 may be manually operated as a conventional volume damper in the usual manner to precisely control the air volume and thus the suction pressure imposed at the suction openings 84. In this manner, the suction pressure available at the conveyor 50 may be readily adjusted as required to pick up and carry previously die-cut and stripped cardboard blanks 14 across the conveyor for deposit upon the deelevating pallet system D" as hereinafter more fully discussed.
  • a reciprocating grid system C" comprising a plurality of spaced, horizontally disposed, longitudinal, separating wires 104 may be observed.
  • Each wire 104 longitudinally stretches between the front and rear grid bars 106, 108, which are reciprocal between an upper position and a lower position 112 (FIG. 4) in response to automatic sensing devices as will hereinafter be more fully explained.
  • Each grid wire 104 respectively lies within the aligned suction box slots 80 and permits longitudinal motion of the suction boxes with respect therewith as the conveyor 50 rotates about the rolls S2, 54.
  • Individual tumbuckles 114 function to permit individual tension adjustment of the respective grid wires 104.
  • the front and rear grid bars 106, 108 vertically reciprocate a distance of approximately 2 inches in response to operation of the air cylinder 120.
  • the vertical reciprocal distance must be sufficient to positively separate the cardboard blanks 14 from the suction attraction of the blowers 96.
  • a sensing device 122 which may be an electric eye, a microlimit or suitable combination of the two, precisely senses the leading edge of the blank 14 when the blank is transported to a position over the deelevating pallet system to activate the air cylinder 120.
  • the air cylinder functions through the crosshead 124 and quickly lowers the entire grid system and the affixed front and rear grill bars 106, 108 approximately 2 inches, thereby forcing the blank 14 downwardly away from the bottom of the suction boxes 72 to release the blanks from the attraction of the suction forces impressed at the openings 84 by the blowers 96.
  • the right and left sleeve bearings 126. 128, 130, 132 journal the vertical grid shafts 134, 136 and facilitate rapid, aligned, reciprocal movement of the grid system C.
  • the deelevating pallet system D receives the cardboard blanks 14 which are transported by the conveyor system B and released therefrom by the separating action of the grid system C.
  • a horizontal platform 138 provides the base of the deelevating pallet system D" and functions to removably receive pallets (not shown) in well-known manner upon which the previously die-cut, stripped and transported cardboard blanks 14 are automatically piled as herein set forth.
  • the individual pallets may be removed from the platform 138 after being loaded by using conventional forklift trucks in the usual manner.
  • the platform 138 securely rests upon the transverse supports, 140, 142 which in turn are end carried by the elevating chains 144, 146, 148, 150.
  • the chains 144, 146, 148, 150 rotatively engage the teeth of the gears 164, 166, 168, 170 to thus raise or lower the platform 138 in response to the operation of the clutch brakes 152, 154.
  • the counterweights 172, 174, 176, 178 respectively end connect to the chains 144, 146, 148, 150 and serve to equalize the weight of chains about the gears 164, 166, 168, 170 in the usual manner to compensate for movement of the chains.
  • a second sensing device 180 which may be an electric eye circuit, determines the height of the pile 182 of cardboard blanks 14 deposited upon the platform 138 and functions to lower the platform 138 by activating the clutch brakes 152, 154 in response to the buildup of the pile 182 by successive deposits of transported blanks. In this manner, the tope 184 of the pile may be maintained at a constant vertical distance from the bottom of the suction conveyor 50 at all times in response to the operation of the sensing device 180.
  • the entire pallet (not shown) with the pile 184 of stripped cardboard blanks 14 may be removed from the platform 138 by utilizing the usual forklift type of equipment and a new pallet can then be inserted in lieu thereof to receive further deposits of stripped and transported blanks.
  • said suction conveyor including a plurality of parallel, transverse suction boxes arranged in an endless loop, each said suction box being provided with a plurality of suction openings,
  • each suction box being provided at the bottom thereof with a plurality of spaced, grid wire receiving slots
  • said slots extending in the direction of sheet travel and being longitudinally aligned to define continuous grid wire receiving areas
  • sensing means detecting the leading edge of each sheet at a precise location along the suction conveyor to activate the grid means to separate the sheet from the suction conveyor;
  • said grid means including an operator connected to front and rear bars, said bars reciprocating between an upper position and a lower position in response to function of the operator,
  • said grid means further including a plurality of longitudinally extending, spaced, parallel wires, said wires respectively connecting between the front and rear bars,

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Mechanical Engineering (AREA)
  • Character Discrimination (AREA)
  • Making Paper Articles (AREA)
US1119A 1968-07-10 1970-01-07 Sheet-transporting assembly Expired - Lifetime US3633903A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB3290268 1968-07-10
FR179550 1968-12-20
US111970A 1970-01-07 1970-01-07

Publications (1)

Publication Number Publication Date
US3633903A true US3633903A (en) 1972-01-11

Family

ID=27244924

Family Applications (1)

Application Number Title Priority Date Filing Date
US1119A Expired - Lifetime US3633903A (en) 1968-07-10 1970-01-07 Sheet-transporting assembly

Country Status (4)

Country Link
US (1) US3633903A (enrdf_load_stackoverflow)
DE (1) DE1774485A1 (enrdf_load_stackoverflow)
FR (1) FR1604067A (enrdf_load_stackoverflow)
GB (1) GB1234066A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3737160A (en) * 1971-07-02 1973-06-05 Recognition Equipment Inc Document stacker system
JPS4890757U (enrdf_load_stackoverflow) * 1972-01-14 1973-10-31
US4203590A (en) * 1978-01-09 1980-05-20 Levi Strauss & Co. Gripper belt transfer
US4981206A (en) * 1987-11-11 1991-01-01 Bishopbarn Limited Package handling apparatus
US7007942B1 (en) 2003-03-25 2006-03-07 Wps Industries, Inc. Panel handling apparatus
US20070006450A1 (en) * 2003-12-16 2007-01-11 Jaen Jose B Pallet assembling machine
US10858237B2 (en) 2018-03-12 2020-12-08 Atlanta Attachment Company System and method for forming a foundation truss

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2969869A (en) * 1957-09-12 1961-01-31 Karl A Klingler Vacuum delivery belt
US3205999A (en) * 1963-09-19 1965-09-14 Weber Marking Systems Inc Stencil conveyor
US3305233A (en) * 1963-05-07 1967-02-21 Weyerhaeuser Co Ejector mechanism for vacuum conveyor
US3477558A (en) * 1966-10-27 1969-11-11 Fred J Fleischauer Air lift and vacuum conveyors and foraminous belt means therefor
US3490764A (en) * 1966-07-16 1970-01-20 Carl K B Mueller Process and device for depositing leaf or sheet material,especially veneer sheets

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2969869A (en) * 1957-09-12 1961-01-31 Karl A Klingler Vacuum delivery belt
US3305233A (en) * 1963-05-07 1967-02-21 Weyerhaeuser Co Ejector mechanism for vacuum conveyor
US3205999A (en) * 1963-09-19 1965-09-14 Weber Marking Systems Inc Stencil conveyor
US3490764A (en) * 1966-07-16 1970-01-20 Carl K B Mueller Process and device for depositing leaf or sheet material,especially veneer sheets
US3477558A (en) * 1966-10-27 1969-11-11 Fred J Fleischauer Air lift and vacuum conveyors and foraminous belt means therefor

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3737160A (en) * 1971-07-02 1973-06-05 Recognition Equipment Inc Document stacker system
JPS4890757U (enrdf_load_stackoverflow) * 1972-01-14 1973-10-31
US4203590A (en) * 1978-01-09 1980-05-20 Levi Strauss & Co. Gripper belt transfer
US4981206A (en) * 1987-11-11 1991-01-01 Bishopbarn Limited Package handling apparatus
US7007942B1 (en) 2003-03-25 2006-03-07 Wps Industries, Inc. Panel handling apparatus
US20070006450A1 (en) * 2003-12-16 2007-01-11 Jaen Jose B Pallet assembling machine
US7472474B2 (en) * 2003-12-16 2009-01-06 Jose Boix Jaen Pallet assembling machine
US10858237B2 (en) 2018-03-12 2020-12-08 Atlanta Attachment Company System and method for forming a foundation truss
US11407633B2 (en) 2018-03-12 2022-08-09 Atlanta Attachment Company System and method for forming a foundation truss
US11845649B2 (en) 2018-03-12 2023-12-19 Atlanta Attachment Company System and method for forming a foundation truss

Also Published As

Publication number Publication date
FR1604067A (enrdf_load_stackoverflow) 1971-07-05
GB1234066A (enrdf_load_stackoverflow) 1971-06-03
DE1774485A1 (enrdf_load_stackoverflow)

Similar Documents

Publication Publication Date Title
US3583614A (en) Continuous suction conveyor stacker
US5006042A (en) Apparatus for feeding boards or sheets from a stack
FR2418186A1 (fr) Appareil pneumatique d'alimentation en feuilles
US5014582A (en) Carton blank deceleration unit
US3737051A (en) Apparatus for aligning edges of stacked sheets in the vertical direction
US5228373A (en) Method and apparatus using electrostatic charges to temporarily hold packets of paper
US5947470A (en) Stacker with discharge control
US3633903A (en) Sheet-transporting assembly
SE8007029L (sv) Anordning for stapling av plana arbetsstycken, serskilt kartongemnen
US3171647A (en) Suction feed mechanism for cardboard and like blanks
US5062764A (en) Method and apparatus using electrostatic charges to stabilize the upper sheets of a stack of paper
US2863663A (en) Delivery end mechanism
US2704209A (en) Paper feeding mechanism
US3328027A (en) Sheet delivery unit
US4136865A (en) Sheet feeding apparatus
US5222720A (en) Hopper with third lifter
JPS592572B2 (ja) 打抜かれた部分の搬出のための装置
US3807610A (en) Stripping machine
US3079150A (en) Oscillating backstop for right angle delivery
US3588093A (en) Suction feeder bar for warped sheets
US3610577A (en) Suction feed conveyor
EP0033799A1 (en) Conveying apparatus for sheet-like articles
JPH0847896A (ja) 段ボール製函機の打ち抜き屑除去装置
US3374904A (en) Machine for arranging letters and the like into rows
CN213893013U (zh) 一种无纺布卷包装设备