Sheet feeding or delivering – Feeding – By means to change direction of sheet travel
Patent
1993-02-11
1994-11-08
Olszewski, Robert P.
Sheet feeding or delivering
Feeding
By means to change direction of sheet travel
271275, 271177, 271184, 271292, 198457, 198531, 198532, 198605, B65H 500
Patent
active
053620402
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a device for individually transferring flat objects, in particular for a postal sorting machine.
Postal sorting machines comprise tools for acquiring and processing images of mail in order to carry out the automated encoding of the addresses by automatic recognition or by video encoding using a recognition carried out by an operator in deferred time. The cost of these installations leads to seeking high productivity for these operations. However, the handling mechanics of existing equipment does not always allow rates to be obtained which are compatible with the performance conferred by the acquisition optoelectronics and the processing electronics.
Postal sorting machines are known of the type comprising a module for unstacking the objects to be sorted, a conveyor or antenna in which the postcode is read and in which a direction is assigned to flat objects moving one after another in the same plane, and a transfer device or injector which receives the objects at the outlet of the conveyor and injects them one by one into bins of a carousel for the purpose of routing them into a compartment corresponding to the destination which has been assigned to the object when it passed through the antenna.
In this way, the document U.S. Pat. No. 2,761,680 describes a transfer device comprising a sequentially driven transfer member adapted so as to transfer the lower edge of flat objects received one by one from an input conveyor from a reception position to a position for ejection towards a receptacle. The transfer member comprises two channels arranged symmetrically with respect to an axis of rotation and which are placed in the extension of the input conveyor in order to receive, one by one, the letters which are held in a position which is slightly inclined with respect to the vertical, by a fixed wall. Once a letter is in position on one of the channels, the transfer member carries out a rotation through 180.degree. about the axis and the other channel is placed in the extension of the input conveyor in order to receive the following letter.
Now, in postal sorting machines of the aforementioned type, the rate of the unstacking module may reach high values of the order of three objects per second, for example, and the output of the conveyor or antenna may easily be adapted to reach such a rate. In contrast, the rate of known transfer devices, which combine a horizontal movement for input of the object to the injector and a vertical movement for insertion into the receptacles of the carousel, may be difficult to increase because, for higher transfer speeds, the mail risks flying away and, for higher outputs, there is a high risk of damaging the objects. Such is the case of the transfer device according to U.S. Pat. No. 2,761,680.
The invention aims to provide a transfer device which allows, without damage, flat objects to be transferred individually at a high rate and in a reliable manner from a conveyor, on which the said objects move in the same plane in a given direction, into receptacles moving at right angles to the said direction, and this being in synchronism with the movement of the said receptacles and without disturbing the operation of the conveyor and, possibly, of the upstream unstacking module, from which the flat objects are brought to the transfer device.
For this purpose, the subject of the invention is such a device comprising a transfer member adapted so as to transfer the lower edge of the flat objects received one by one from the input conveyor from a reception position to a position for ejection towards a receptacle, characterized in that the said transfer member is shaped so as jointly to allow the arrival of at least one flat object in the said reception position and the transfer of another flat object into a receptacle from the said ejection position, and in that the said device also comprises a reception conveyor adapted in order to hold the said flat objects resting on the said transfer member in a position which is slightly inclined with respect to the ve
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Creedon et al., Card Feed System, Jun. 1971, IBM Tech. Disclosure Bulletin, vol. 14, No. 1, p. 136.
Midavaine Pierre
Roch Jean
Bertin & Cie
Milef Boris
Olszewski Robert P.
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