Envelope throat opening blade

Details Envelope throat opening blade Envelope throat opening blade

1988-12-30

1989-12-26

Spruill, Robert L.

Package making

Apparatus for forming or partially forming receptacle and...

Forming by opening or setting up collapsed receptacle

53260, 53266A, B65B 506, B65B 3912, B65B 4326

Patent

active

048889385

ABSTRACT:
Apparatus for inserting documents into an envelope. The apparatus includes: a housing frame; a constantly turning roller rotatably mounted to the frame; a lower, rotatable belt mounted to the frame and trained over the roller, the lower belt having an upper reach; and an upper, rotatable belt mounted to the frame, the upper belt having a lower reach engagable with the upper reach of the lower belt for transporting the documents. The apparatus further includes: a device for separating the front wall from the back wall of the envelope, the device located on the downstream side of the upper and lower belts; an envelope throat opening blade mounted to the frame on the downstream side of the upper and lower belts; and a pivotable trigger cam connected to the blade and engageable with the constantly turning roller and the documents, whereby when the documents engage the cam, the roller is engaged by the cam to thereby drive the opening blade into the throat of the envelope.

REFERENCES:
patent: 3381447 (1968-05-01), Ash et al.
patent: 3936993 (1976-02-01), Dorer
patent: 4633644 (1987-01-01), Haroutel et al.

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