Receptacles – Closures – With condition responsive vent or valve
Patent
1977-10-27
1980-02-05
Shoap, Allan N.
Receptacles
Closures
With condition responsive vent or valve
220 904, 220306, 222511, A47G 1922
Patent
active
041868420
ABSTRACT:
A frusto-conical drinking cup which is open at the top and a lid which is removably attached thereto by a "snap" connection. The lid comprises a top wall and an annular skirt depending therefrom. This lid is of a flexible plastic having the property of elasticity to a high degree. It is formed with a slit in close proximity to its periphery and cut on the bias to provide a drinking opening when the lid material is depressed. It is also formed with a straight slit at a site diametrically opposite to the drinking opening and spaced inwardly from the periphery a greater distance than the drinking valve opening. This lid provides a relief valve when the lid is depressed. The lid is fairly thin and is formed with a generally circular reinforcing rib spaced from its periphery and another reinforcing rib between the slit and arranged diametrically of the lid.
REFERENCES:
patent: 2003657 (1935-06-01), Stubblefield
patent: 2738090 (1956-03-01), Davis
patent: 3048317 (1962-08-01), Cochrane et al.
patent: 3227304 (1966-01-01), Asbury
patent: 3262611 (1966-07-01), Palmer
patent: 3730399 (1973-05-01), Dibrell et al.
patent: 3797696 (1974-03-01), Dibrell
patent: 3905512 (1975-09-01), Albert et al.
patent: 4081103 (1978-03-01), Zoellick
Flickinger Don J.
Inventor's Inc.
Shoap Allan N.
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