Method and device for maintaining the opening position of an...

Details Method and device for maintaining the opening position of an... Method and device for maintaining the opening position of an...

2005-12-13

2005-12-13

Kim, Eugene (Department: 3721)

Package making

Means to open or erect receptacle

Means to open envelope

C053S381700

Reexamination Certificate

active

06973762

ABSTRACT:
A device to lift a throat of an envelope to spread open the envelope. The device comprises a suction cup mounted to a pitching arm; a hook movably mounted adjacent to the suction cup; means for lowering the pitching arm to allow the suction cup to seal with the throat with a suction force, and raising the pitching arm to allow the suction cup to lift the throat; and an actuation device for placing the hook under the throat after the throat has been lifted by the suction cup so as to mechanically maintain the lifted position of the throat. Accordingly, the method of maintaining the lifted position of a throat includes the steps of: 1) positioning the suction cup over the throat; 2) pressing the suction cup against the throat to seal with the throat; 3) raising the suction cup to lift the throat; and 4) placing the hook under the lifted throat to mechanically maintain the lifted position of the throat. It is preferred that the suction force can be provided by a vacuum pump, and preferably a piston operated vacuum pump.

REFERENCES:
patent: 4035988 (1977-07-01), Daniels
patent: 4776152 (1988-10-01), Kruk
patent: 4835941 (1989-06-01), Torii et al.
patent: 5052168 (1991-10-01), DeWitt et al.
patent: 5447015 (1995-09-01), Belec et al.
patent: 5581972 (1996-12-01), Antonelli
patent: 6164043 (2000-12-01), Miller et al.
patent: 6425223 (2002-07-01), Miller et al.

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