Method of mixing paints and their toners

• US 4,335,759 A
• Filed: 08/23/1979
• Issued: 06/22/1982
• Est. Priority Date: 05/10/1979
• Status: Expired due to Term

• Current Assignee: Winter Osakeyhtio
• Original Assignee: Winter Osakeyhtio
• Inventors: Koivisto, Eero, Pattiniemi, Veikko, Kokki, Heikki, Heikel, Aslak R.
• Primary Examiner(s): Bell, Jr., Houston S.
• Application Number:
  US06/069,030
• Time in Patent Office: 1,034 Days
• Field of Search: 220/203, 141/329, 141/330, 141/19, 141/1-12
• US Class Current: 141/5
• CPC Class Codes: B01F 2101/30 Mixing paints or paint ingredients, e.g. pigments, dyes, colours, lacquers or enamel
• CPC Class Codes: B01F 33/841 with component receptacles fixed in a circular configuration on a horizontal table, e.g. the table being able to be indexed about a vertical axis
• CPC Class Codes: B01F 35/713 comprising breaking packages or parts thereof, e.g. piercing or opening sealing elements between compartments or cartridges containers or packages per se B65D
• CPC Class Codes: B01F 35/7131 Breaking or perforating packages, containers or vials
• CPC Class Codes: B01F 35/7163 the containers being connected in a mouth-to-mouth, end-to-end disposition, i.e. the openings are juxtaposed before contacting the contents
• CPC Class Codes: B44D 3/003 Methods or devices for colour determination, selection or synthesis, e.g. use of colour tables

Abstract

A machine for mixing paints and their toners, comprising a plurality of toner containers wherefrom required quantities of selected toners are added to a basic paint can. Each toner container is at its upper end provided with a back pressure valve allowing air to enter into the container as the toner level sinks but preventing air from leaving the container.

Claims

1. A method of mixing toner from a container of toner with basic paint in a basic paint can, the toner container having a dosing device which includes a nozzle and also having an opening for allowing air to enter the container, wherein the improvement resides in that, in order to prevent drying of the toner remaining in the container, said opening is provided with a back pressure valve which is disposed to allow air to enter the container and prevent air from leaving the container, and the method comprises the steps of employing the dosing device to withdraw a measured quantity of toner from the container, and introducing said measured quantity of toner into the basic paint can by way of the nozzle of the dosing device, withdrawal of toner from the container by way of the dosing device causing a reduction of pressure of air in the container so that the back pressure valve opens and allows air to enter the container and subsequently closes to prevent escape of air from the container and consequent drying of the toner remaining in the container.

2. A method as claimed in claim 1, wherein the nozzle is formed with an opening through which toner is discharged from the container, and contact between toner in said opening and the ambient air is prevented when the dosing device is inactivated.