Title: Laminated insulated hot drink cup

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Claims: Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is:

1. A hot drink cup, comprising:

a cup member formed of synthetic resin material and having a bottom wall and an upwardly extending, continuous sidewall connected to the bottom wall for cooperatively presenting a liquid-holding cavity;

said sidewall including structure which defines, on the exterior face thereof,

(1) a pair of annular, continuous bands respectively extending about said sidewall, being located adjacent the upper and lower extremities of said sidewall, and spaced outwardly from the major surface presented by said sidewall; and

(2) a series of elongated, spaced, side-by-side spacer ribs disposed in an upright relation, extending between said bands and outwardly from said major surface, and presenting, on the outermost extremities thereof, respective, relatively sharp, pointed contact lines; and

an overlap disposed about said sidewall, and in engagement with said bands and contact lines,

said ribs, member sidewall and overwrap cooperatively defining a series of elongated, discrete dead air cells for creating a heat insulation barrier between hot liquid in said cavity and a person's hand in engagement with the exterior surface of said overlay.

2. The cup as set forth in claim 1 including a circular bead formed at the upper end of said member sidewall which extends outwardly and engages the upper margin of said overwrap.

3. The cup as set forth in claim 1 wherein said overwrap is adhesively secured to said bands.

4. The cup as set forth in claim 1 wherein said cup member is formed of impact grade polystyrene having an izod impact strength of from about 0.5 to 1.5.

5. The cup as set forth in claim 4 wherein said major surface of said member sidewall has a thickness of from about 0.015 to 0.020 inches.

6. The cup as set forth in claim 1 wherein said bands are spaced a distance of from about 0.012 to 0.025 inches from said major surface.

7. The cup as set forth in claim 1 wherein said ribs extend outwardly from said major surface a distance equal to the distance of said bands from said major surface.

8. The cup as set forth in claim 1 wherein said ribs are of triangular cross-section.

9. A hot drink cup, comprising:

a cup member formed of synthetic resin material and having a bottom wall and an upwardly extending, continuous sidewall connected to the bottom wall for cooperatively presenting a liquid-holding cavity;

said sidewall including structure which defines, on the exterior face thereof,

(1) an annular, continuous band extending about said sidewall, located adjacent the upper extremity of said sidewall, and spaced outwardly from the major surface presented by said sidewall; and

(2) a series of elongated, spaced, side-by-side spacer ribs disposed in an upright relation, extending from said band and outwardly from said major surface, and presenting, on the outermost extremities thereof, respective, relatively sharp, pointed contact lines; and

an overlap disposed about said sidewall and in engagement with said band and contact lines.

Other info:

Inventors: Watkins, John B. (Independence, MO, US)
Black, Glen N. (Osage City, KS, US)

Application Number: 089762
Filing Date: 1979-10-31
Publication_date: 1981-04-14
Assignee: Hallmark Cards Incorporated (Kansas City, MO)
Primary Class(es): 229/404 220/592.17, 220/592.22, 220/918, D7/531
Other Classes:
US Patent Ref:

Re25618	Jul, 1964	Goodman	229/1.
2266828	Dec, 1941	Sykes	229/1.
2675954	Apr, 1954	Vogel	229/1.
3169689	Feb, 1965	Schwartz	229/1.
3237834	Mar, 1966	Davis et al.	229/1.
3456860	Jul, 1969	Janninck	229/1.
3759437	Sep, 1973	Amberg	229/1.

Other Refs: 6138571085536

Feb, 1961	CA
Oct, 1967	GB

Primary Examiner: Lowrance, George E.
Assistant Examiner:
Attorney: Schmidt, Johnson, Hovey & Williams