A composition in solid or liquid form for machine dishwashing is disclosed, containing a builder such as a phosphate salt, an alkaline material such as sodium silicate and a halite such as sodium chlorite. The composition is for use with a machine incoporating an ultraviolet light source to irradiate the dishes and/or the liquor. The composition may also include a low-foaming or non-foaming surfactant and other usual adjuncts, especially enzymes. An exemplified composition is 33% tripolyphosphat...

A washing container for a dishwasher having several parts joined together, including a frame with walls, a base, and/or a cover attached thereto. The container can easily be adapted to varying predefined requirements according to the design of the dishwasher.

The dishwashing machine has at least two washing vessels (10 12) that are separated from each other and are part of a structural assembly (3) that is capable of being pulled out as a whole from a casing (1) in which it is housed. Each such washing vessel (10 12) has at least a loading lid or door (17) that can be opened when the structural assembly (3) is in its pulled-out position.

The process of dishwashing in an institutional dishwashing machine by adding to the wash liquor of the dishwashing machine a low-alkali content detergent composition and adding to a washing tank of the dishwashing machine a detergency booster composition containing an enzyme. Apparatus to practice the process is also disclosed.

A method of determining a dish load for an automatic dishwasher and a method of operating the automatic dishwasher based on the dish load. The dish load is determined by determining a first temperature corresponding to the temperature of the dishes, determining a second temperature corresponding to the temperature of a charge of water prior to a time when the charge of water contacts and transfers heat to the dishes, determining a third temperature corresponding to the temperature of the second ...

A method for the mechanical washing of dishes, wherein the soiled dishes are treated with an aqueous alkaline liquor having a pH of from 8 to 13 which contains at least one compound inhibiting alkaline earth metal ion precipitation, rinsing and recovering cleaned dishes comprising using finely-dispersed, water-insoluble silicate compounds having a calcium-binding power of at least 50 mg CaO/gm of anhydrous substance and having the formula, combined water not shown, of where M is a cation of the ...

The drain filter has large inlet openings at a raised position and small inlet openings at its bottom, all shaped to cooperate with the dishwashing machine sump to form labyrinthine drainage passageways to stop debris exceeding an acceptable size. The drain filter is in two parts, a fixed portion and a removable portion, both of which provide these features. The large inlet openings into the removable portion of the drain filter are upwardly facing and on the downstream side of an elevated wall ...

A tandem rack dishwashing machine in which the single unit model is designed to handle two half-racks at a time and arranged in tandem, the half-racks supporting solid dishes, or one full rack at a time; and in which the double unit model is designed to handle two full racks of soiled dishes at a time and arranged in tandem, the double unit model having a control switch in series with a starting switch and positioned at the exit end of the machine so as to be closed by the racks only when the tw...

Disclosed is a method for controlling a dishwasher, including sensing weight, volume, and location of items disposed in dishwasher compartments, communicating sensed data to a controller, calculating duration of a washing and drying cycle and an amount of cleaning solution to be used based on the sensed data, implementing the washing and drying cycle for the length of time, wherein a smaller sensing of the weight and volume results in a shorter amount of time than would be spent based on a large...

A dishwashing machine having a gas-fired heater is provided with a flue structure having wall portions common to the tank and wash chamber of the machine. While the machine is running liquid splashes against these wall portions and exchanges heat therewith. When the water circulation system is stopped, the heater is limited to a standby condition which is predetermined to maintain these wall portions at substantially the same temperature as during running conditions.