Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
  • B43M—BUREAU ACCESSORIES NOT OTHERWISE PROVIDED FOR
  • B43M3/00—Devices for inserting documents into envelopes
  • B43M3/04—Devices for inserting documents into envelopes automatic
  • B43M3/045—Devices for inserting documents into envelopes automatic for envelopes with only one flap
• • 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
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S271/00—Sheet feeding or delivering
  • Y10S271/902—Reverse direction of sheet movement

Definitions

• the present invention relates to a destacker for removing an envelope from a stack and delivering it open.
• Document US-A-2 267 574 discloses a destacker comprising a chassis; means for storing a stack of envelopes, folded flaps; means for extracting an envelope from the bottom of the stack; and means for driving the envelope extracted on a path from upstream to downstream, in a direction of advance.
• a movable member such as a claw is used to open the flap of the envelope extracted from the stack, which causes some kinematic complications and a non-optimal use of space.
• the object of the invention is to improve the known destackers with in particular greater compactness and a simplification of the mechanical members involved.
• a device for unstacking and opening envelopes from a stack of envelopes with folded flaps comprising:
• a fixed wedge-shaped deflector directed obliquely to said direction of advance and disposed downstream of said first drive means, second envelope drive means on said downstream path upstream, in a backward direction, arranged upstream of said deflector,
• wedge-shaped deflector it is meant that the wedge shape, preferably rounded, allows the deflector to deflect the flap when the envelope recedes, and authorizes its unfolding.
• said extraction means comprise an endless strip disposed at the bottom of the storage means and cooperating with an extraction space left at the bottom of a wall of said storage means.
• the extraction means can cooperate with envelope separating means, arranged downstream, and for example made up of overlapping rollers arranged on either side of the path of the envelope and rotating in the same direction.
• the first and second drive means consist of antagonistic rollers in mutual support.
• the first and second means are preferably combined in the same said rollers, driven by a bidirectional motor.
• the destacker of the invention advantageously comprises a device for pressing the envelope stack, the commissioning of which can be monitored by detection means so as to activate the operation of the destacker.
• the board 1 is a developed sectional view of a destacker according to the present invention
• - Plate 2 shows the profile section view of Plate 1
• - Plates 3, 4, 5, 6, 7 and 8 show internal profile views of Plate 1 describing each stage of operation of said destacker.
• the envelope unstacker comprises a main frame or structure formed by the plates 1 and 1 'and a number of spacers 2. Inside this structure, the envelope storage area comprises the vertical sheet 3 and the horizontal support sheet 4. The envelopes 5 are placed in a stack on the two fm without extraction belts 6 and 6 ′, the upper strand of which slightly exceeds the plane of the sheet 4.
• a cylindrical presser 7 is applied to the top of the stack of envelopes; two cables 9 and 9 'passing around the return rod 11 and winding on the shaft 10.
• the presence of the cylindrical presser 7 on the top of the envelope stack 5 is detected by a contactor 12.
• a pierced tab of the contactor 12 is crossed by the cable 9.
• the envelope separation device comprises rollers 13 mounted on a shaft 14 and pairs of rollers 15 mounted on the shaft 16. Each roller 13 penetrates slightly into the pair of rollers 5 associated with so that an envelope can pass between said rollers, undulating slightly.
• the drive device comprises rollers 17 mounted on the shaft 18 and rollers 19 mounted on the shaft 20.
• the rollers 17 are in contact with the rollers 19.
• the belts 6 and 6 'and the rollers 13, 15 and 19 are set in motion by the bidirectional motor 21 via the pulley-belt assembly 22, 23, 24, 25, 26, 27, 28, 29 and 30.
• the means for opening the flap comprise the wedge-shaped fixed deflector 31 and the movable flap 32.
• the movable flap 32 is controlled by the electromagnet 33 by means of the rod 34.
• the shutter 32 In the rest position, shown by the arrow 35, the shutter 32 is, under the action of the return spring 37, in contact with the stop 36.
• the electromagnet 33 moves the movable shutter 32 in the low position shown by the arrow 38.
• An optical barrier composed of the transmitting cell 39 and the receiving cell 40, informs the control unit of the passage of the envelope in front of the cells.
• the control unit therefore takes as reference the passage of the hinge of the envelope at this barrier and knows at all times the position of the envelope in the mechanism since the motor 21 is a so-called servo actuator (motor stepper, DC motor with encoder ...)
• the device is in the starting position.
• the casing presser 7 is brought into the high position by the motor 8 by the cables 9 and 9 '.
• the cables are therefore stretched and the contactor 12 is closed.
• the latter informs the control unit that the presser is in the high position and that the device can receive a packet of envelopes to be unstacked.
• the package of envelopes 5 is then placed manually by the operator or automatically by a mechanical system not forming part of the invention.
• the envelopes are stacked in contact with the vertical sheet 3 with their flaps positioned at the front in the high position.
• the cylindrical presser 7 is lowered into contact with the top of the stack of envelopes by means of the motor 8 and the cables 9 and 9 '.
• the contactor 12 changes state and indicates to the control unit that the presser 7 is in pressure on the stack of envelopes 5.
• the motor 21 is then set in rotation which has the effect of setting in motion the mechanical members which are linked to it, in particular the extraction and transport belts 6 and 6 ′ and the separation assembly 13 and 15.
• the envelope being in contact with the belts 6 and 6 'is driven towards the separator 13, 15. Often, some envelopes accompany it.
• the envelopes accompanying the lower envelope remain blocked at the height of the separator by the action of the roller 13 s Opposing by its rotation to their advance.
• the lower casing can pass through the separator because it is directly in contact with the conveyor belts 6 and 6 'and thus has great driving power.
• FIG. 4 shows the next step. Transporting the envelope
• the control unit knows what movement the envelope 5 must make from its passage in front of the light barrier 39 and 40 so that the flap of the envelope comes off completely from the body of the envelope.
• FIG. 5 shows the next step.
• the rotation of the motor 21 is reversed.
• the envelope body is stored partially under the envelope stack.
• the detached flap slides along the vertical part of the deflector 31.
• FIG. 6 shows the next step.
• the movable deflector 32 is then brought into the high position shown by the arrow 35 by stopping the control of the electromagnet 33.
• the casing 5 continuing to retreat, the flap opens under the action of the wedge end rounding of the fixed deflector 31.
• the control unit stops the reverse of the motor 21.
• Figure 7 shows the next step.
• the movable deflector 32 is returned to the low position.
• the motor 21 is then started forward: the envelope moves to the left.
• the flap which is at the head of this movement, is deflected downwards by the movable deflector 32 then passes under the fingers 41 for receiving the dynamic insertion system not forming part of the invention.
• This system can in particular be that described in US-A-5 410 860, the fingers 1-1 'of which correspond to the fingers 41 of FIG. 7 of the present invention. Reference may also be made to document WO-A-95/16578.
• Figure 8 shows the final step.
• the movable deflector 32 is brought back to the high position shown by the arrow 35 by the action of the electromagnet 33.
• the deflection of the casing 5 ceases; which allows it to open and fit the fingers 41 for receiving the dynamic insertion system.
• the cycle is then finished.

Landscapes

• Supplying Of Containers To The Packaging Station (AREA)
• Packaging Of Special Articles (AREA)
• Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
• Sheets, Magazines, And Separation Thereof (AREA)
• Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=9484664

Family Applications (1)

Country Status (7)

Families Citing this family (9)

Family Cites Families (10)

• 1995
  • 1995-11-17 FR FR9513646A patent/FR2741299B1/fr not_active Expired - Fee Related
• 1996
  • 1996-11-04 US US09/068,843 patent/US6036185A/en not_active Expired - Lifetime
  • 1996-11-04 EP EP96937389A patent/EP0958148B1/de not_active Expired - Lifetime
  • 1996-11-04 CA CA002238001A patent/CA2238001C/fr not_active Expired - Fee Related
  • 1996-11-04 WO PCT/FR1996/001729 patent/WO1997018957A1/fr active IP Right Grant
  • 1996-11-04 DE DE69613407T patent/DE69613407T2/de not_active Expired - Lifetime
  • 1996-11-04 AT AT96937389T patent/ATE202039T1/de not_active IP Right Cessation

Non-Patent Citations (1)

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