Package making – Apparatus for forming or partially forming receptacle and... – Forming by opening or setting up collapsed receptacle
Patent
1996-05-10
1998-01-13
Sipos, John
Package making
Apparatus for forming or partially forming receptacle and...
Forming by opening or setting up collapsed receptacle
532843, 533815, B65B 4326
Patent
active
057066361
DESCRIPTION:
BRIEF SUMMARY
The present invention pertains to an envelope-stuffing device with a stacking device and a pull-off device each for the envelopes and for the envelope contents, as well as with a device for spreading the envelopes and for introducing the envelope contents into the spread envelope, along with a conveyor for removing the stuffed envelopes.
Prior-art envelope-stuffing machines of this class have a limited output, because the opened envelope pulled off from the stack must be pulled from one side onto a so-called packing pocket, with which the envelope is also spread at the same time. The envelope contents are then fed into the packing pocket from the other side and pushed into the envelope. Consequently, the two processes take place one after another and thus limit the maximum efficiency of the envelope-stuffing device.
The task of approximately doubling the stuffing speed has been known from EP-A 0 504 114. The reciprocating movements of different elements in the prior-art envelope-stuffing machine were believed to be the cause of the impossibility of increasing the output. It is suggested in EP-A 0 504 114, instead, that an increase in output be brought about by performing the opening and the pulling off of the envelopes from the stack by means of rotating elements, which are mounted on a common axis, but are driven differently. However, this disclosure also involves the use of a packing pocket, onto which the envelope fed in must first be pulled in order to introduce the envelope contents into the envelope from the other side.
In contrast, the basic object of the present invention is to bring about the desired increase in output by working with a plurality of packing pocket and another envelope at another point is stuffed with the envelope contents at the same time in order to thus substantially reduce the cycle times.
This object is accomplished according to the present invention by the device for spreading and keeping ready the envelopes being designed as a link chain equipped with a plurality of spreading members, whose conveying plane extends at right angles to and between the conveying planes for the envelopes and the envelope contents, which are located at different levels, wherein the individual spreading member picks up the opened envelope in one conveying plane during the stopped phase and keeps the envelope received ready for pushing in the envelope contents in the other conveying plane.
Consequently, the cycle time is reduced in the subject of the present invention by the pulling of the envelope onto the spreading member (packing pocket) taking place simultaneously with the pushing of the envelope contents into another envelope and by the time needed to feed in or pull off an envelope being used to move the spreading members from the envelope pick-up station into the discharge station.
Advantageous embodiments of the present invention are disclosed in claims 2 through 6. It is advantageous, e.g., according to claim 2 to allow the conveyors for the envelopes and for the envelope contents to revolve continuously and the link chain intermittently. An additional increase in output is achieved as a result, because the times for pulling the envelopes onto the spreading member and for stuffing in the envelope contents and for pulling off the stuffed envelope can be further reduced.
According to claim 3, it is recommended that the conveyors for the envelopes and for the envelope contents be allowed to revolve in the transfer area in the horizontal plane (at levels one on top of another) and the link chain in the vertical direction.
Another subject of the present invention pertains to the special design of the link chain according to claim 4. According to this claim, the link chain comprises two individual chains, which are arranged at spaced locations from one another, revolve around mutually parallel axes, and on which the spreading members are arranged in the same plane, directed toward each other. The envelope fed in can consequently be spread with ease during the pulling onto the two spreading member
REFERENCES:
patent: 4781013 (1988-11-01), Depasquale et al.
patent: 5408811 (1995-04-01), Satake
Bowe Systec AG
Sipos John
Tolan Ed
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