Liquid supply assembly

A method for providing a supply of mixed component liquids for a liquid spraying device, said method comprising the steps of:

• providing a container of stiff polymeric material comprising a side wall having top and bottom ends, and a bottom wall extending across the bottom end of the side wall, the container having an inner surface defining a cavity in the container, and the top end of the side wall defining an opening into the cavity, a portion of the inner surface along the side wall having the shape of a conical frustum and increasing in diameter from the bottom end toward the top end of the side wall;
• providing a liner of flexible visually transparent material having an outer surface corresponding in shape to the inner surface of the container, an inner surface defining a cavity in the liner, and an annular lip adapted to be positioned along the top end of the side wall of the container when the outer surface of the liner is along the inner surface of the container, said annular lip defining an opening into the cavity in the liner;
• providing an indicating sheet of resiliently flexible polymeric material adapted to conform in shape to the inner surface of said container and bearing indicia that when the sheet is positioned along the inner surface of the container will indicate the levels to which a plurality of different liquids can be sequentially poured into the cavity in the flexible liner to achieve a predetermined ratio between the liquids;
• positioning the indicating sheet in the cavity along the side wall of the container;
• positioning the liner within the cavity in the container so that the indicating sheet is between the liner and the side wall of the container;
• and
• sequentially pouring the component liquids into the cavity in the liner to levels indicated by indicia on the indicating sheet to achieve a predetermined ratio between the component liquids.

A combination for use in making a liquid supply assembly for use with a liquid spraying device, said combination comprising:

• a container of stiff polymeric material comprising a side wall having top and bottom ends, and a bottom wall extending across the bottom end of said side wall, said container having an inner surface defining a cavity in said container, and said top end of said side wall defining an opening into said cavity, a portion of said inner surface along said side wall having the shape of a conical frustum and increasing in diameter from said bottom end toward said top end of said side wall;
• a flexible liner adapted to be positioned within the cavity in said container, said liner having an outer surface corresponding in shape to the inner surface of said container, an inner surface defining a cavity in said liner, and an annular lip along the top end of said side wall defining an opening into the cavity in said liner;
• and
• a plurality of indicating sheets of resiliently flexible polymeric material, each adapted to be positioned between said side wall of said container and said flexible liner when said flexible liner is in said container, said indicating sheet being adapted to conform in shape to the inner surface of said container and bearing indicia then visible through the side wall of said container indicating the levels to which a plurality of different liquids can be sequentially poured into the cavity in the flexible liner to achieve a predetermined ratio between the liquids;
• said indicating sheets bearing different indicia that when each indicating sheet is positioned along the inner surface of the container will indicate the levels to which a plurality of different liquids can be sequentially poured into the cavity in the flexible liner to achieve different predetermined ratios between the liquids.

An indicating sheet adapted to be used in a liquid supply assembly for use with a liquid spraying device, which supply assembly comprises a container of stiff visually transparent polymeric material comprising a side wall having top and bottom ends, and a bottom wall extending across the bottom end of said side wall, said container having an inner surface defining a cavity in said container, and said top end of said side wall defining an opening into said cavity, a portion of said inner surface along said side wall having the shape of a conical frustum and increasing in diameter from said bottom end toward said top end of said side wall;

• and a flexible liner adapted to be positioned within the cavity in said container, said liner having an outer surface corresponding in shape to the inner surface of said container, an inner surface defining a cavity in said liner, and an annular lip adapted to be positioned along the top end of said side wall and defining an opening into the cavity in said liner;
• said indicating sheet being of resiliently flexible polymeric material, and being adapted to be positioned between said side wall of said container and said flexible liner, said indicating sheet being adapted to conform in shape to the inner surface of said container along said side wall and having a lower edge adapted to be positioned in a plane normal to the axis of the inner surface of the container when the indicating sheet is in the container and to be supported at a predetermined position in the container, and said indicating sheet bearing indicia indicating the levels to which a plurality of different liquids can be sequentially poured into the cavity in the flexible liner to achieve a predetermined ratio between the liquids.