Automatic machine for the preparation of coffee infusions and pr

Details Automatic machine for the preparation of coffee infusions and pr Automatic machine for the preparation of coffee infusions and pr

1991-10-23

1994-01-04

Jenkins, Robert W.

Foods and beverages: apparatus

Beverage

Infusors

99297, 99302P, A47J 3134

Patent

active

052750892

ABSTRACT:
It comprises at least one unit formed by a piston and by a cylindrical chamber, as well as means for supplying with ground coffee and with hot water under pressure, and means for the automatic starting and stopping of the unit and its means of supply. The piston (2) is fixed and the chamber (11, 16) is movable, both arranged horizontally. The chamber is formed by two juxtaposed cylindrical parts, the first part (11) accommodating in rest position the head (3) of the piston (2) fitted with an annular seal (6), has a diameter smaller than the diameter of the seal (6). The second part (16) of the cylindrical chamber has an inner diameter smaller than the outer diameter of the seal (6) permitting sealed sliding. The first part (11) houses a free sleeve (10) the inner diameter of which is equal to the inner diameter of the second part (16) so as to protect the seal when the head (3) passes in front of a lateral opening (13) for supplying ground coffee.

REFERENCES:
patent: 3565641 (1971-02-01), King
patent: 3760712 (1973-09-01), Rossi
patent: 4110221 (1978-08-01), Moser
patent: 4491063 (1985-01-01), Grossi
patent: 4681028 (1987-08-01), Schmed et al.
patent: 4852472 (1989-08-01), In-Albon et al.
patent: 4936199 (1990-06-01), Ruggin et al.
patent: 4941399 (1990-07-01), Zucchetti

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