Dispensing bottle

Abstract

Described is a plastic bottle fitted with a one-way check valve and an inner bladder containing a substance such as mustard or ketchup. When squeezed, the substance is dispensed from an inner bladder through an aperture in the top. When released, air is allowed into the bottle through the valve to displace the substance dispensed. Since the valve will not allow air out of the bottle, the bladder continuously shrinks until all the substance is dispensed without any waste or the need to strike the bottle or store it upside down. No air comes into contact with the substance thus avoiding bacterial contamination.

1 . A dispensing bottle or container for dispensing a food substance, such as ketchup, mustard or a cosmetic substance such as hair conditioner or shampoo, that is manufactured from any flexible material such as PVC plastic.
 a) A bottle that is equipped with an inner elastic bladder, or other stretchable container, that is capable of being filled with a substance without the substance itself coming in contact with the inside walls of the bottle.   b) A bottle containing a one-way valve which will not allow air to escape from the inside of the bottle when the bottle is squeezed but allows air into the bottle when the bottle is released.   c) A bottle that has an aperture at one end to force a substance to escape when the bottle is squeezed.   d) A bottle cap that will allow the aperture to be sealed when not in use.   
     
     
         2 . A dispensing bottle in  claim 1  wherein the bottle is manufactured from a flexible material that will return the bottle to its original shape after being squeezed and released. 
     
     
         3 . A dispensing bottle in  claim 1  wherein a thin, elastic, inner bladder stretches to fill the outer bottle when the bladder is filled with a substance to be dispensed. 
     
     
         4 . A dispensing bottle in  claim 1  wherein a one-way check valve located on the surface of the outer bottle will not allow air out of the bottle when it is squeezed, but will allow air into the bottle when the bottle is released. 
     
     
         5 . A dispensing bottle in  claim 1  wherein an aperture allows a substance to be forced from the inner bladder by the act of squeezing the bottle. 
     
     
         6 . A dispensing bottle in  claim 1  where the inner bladder prevents any air from coming into contact with a contained substance, preventing bacterial degradation, hardening or break down of the substance. 
     
     
         7 . A dispensing bottle in  claim 1  wherein an inner bladder contracts as the contained substance is dispensed by the act of squeezing the bottle. After releasing the bottle, the bladder stays in its contracted state because air is allowed into the space between the bottle and the bladder by the one way check valve. The said air displaces the space previously occupied by the dispensed product. 
     
     
         8 . The method of  claim 7  wherein the repeated squeezing and releasing of the bottle causes the inner bladder to shrink as it dispenses more of its contained substance through the aperture. The inner bladder will continue to shrink as the substance is dispensed until virtually all the substance has been dispensed from it.