Envelope-stuffing machine
AssigneeBowe Bohler & Weber KG Maschinenfabrik
InventorRudolf Wanner
Life of this patent
Estimating the term…
Abstract
An envelope-stuffing machine adapted to insert sheets of paper or the like into an envelope or a folder comprises a pair of opposite perforated surfaces connected to a suction chamber and between which the envelope or folder is introduced so as to draw the opposite sides of the envelope or folder apart to receive the sheets to be inserted. A pressure sensor is provided to respond to the suction in the chamber communicating with the perforations of the surfaces to trigger the insertion of the sheets upon the detection of a predetermined reduced pressure in the chamber. The pressure sensor is of the threshold type.
Claims10
A machine for introducing an insert between spreadable sides of a cover forming a mouth to receive said insert upon the spreading of said sides, said machine comprising:
- means for displacing said cover into an insertion station;
- a suction head at said station having a pair of perforated suction surfaces juxtaposed with the respective sides of a cover disposed at said station, a suction chamber cmmunicating with the perforations of said surfaces, and means for evacuating said chamber whereby the suction generated at said surface spreads said sides and undergoes an increase in suction level upon contact of said sides with said surfaces;
- a transport mechanism for feeding said insert into the mouth of said cover formed upon spreading of said sides;
- a threshold-value sensor responsive to the suction level in said chamber;
- and
- circuit means connecting said sensor to said mechanism for activating same to introduce said insert into said cover upon the development of a predetermined vacuum level in said chamber.
Dependencies are inferred from the claim text.