RussianPatents.com

Apparatus for controlling pressure of roller press. RU patent 2254240.

FIELD: food-processing industry, in particular, processing of tea mass by pressure.

SUBSTANCE: apparatus for controlling pressure under roller press piston has pressure sensor with electric output signal. Said sensor is connected with flexible pipeline disposed along perimeter between wooden pad and metal base of roller press and filled with liquid. Roller press is characterized in that pressure sensor is built into press, said sensor having hollow pipeline filled with liquid, hydraulic pressure sensor, stable voltage source, amplifier, standardizing converter and registering instrument.

EFFECT: improved quality of tea owing to controlling of pressure under piston of roller press.

2 dwg

IPC classes for russian patent Apparatus for controlling pressure of roller press. RU patent 2254240. (RU 2254240):

B30B15/22 - controlling the degree of pressure applied by the ram during the pressing stroke

A23F3/12 - Rolling or shredding tea leaves

Another patents in same IPC classes:

Apparatus for controlling pressure of roller press / 2254240
Apparatus for controlling pressure under roller press piston has pressure sensor with electric output signal. Said sensor is connected with flexible pipeline disposed along perimeter between wooden pad and metal base of roller press and filled with liquid. Roller press is characterized in that pressure sensor is built into press, said sensor having hollow pipeline filled with liquid, hydraulic pressure sensor, stable voltage source, amplifier, standardizing converter and registering instrument.

Product of green tea leaves and its production method / 2432087
Present invention relates to production of Camellia sinensis var. Assamica green tea wherein one infuses 2 g of tea leaf in 200 ml of water during 1.5 minutes at a temperature of 90°C to produce a beverage including catechins in an amount of 0.01-0.1 % of the beverage weight. Additionally the present invention relates to a method for production of a product of tea leaf wherein fresh var. assamica is macerated using a combination of a rotorvane and a biconical processor.

Black tea production / 2470519
Inventions group relates to food industry. Tea leaves are air-dried till moisture content is equal to 64-70%. The leaves are macerated by way of their passing through a rotary lobed machine wherein some of lobes are replaced with lobes invertedly reversed. Tea leaves leaving the rotary lobed machine are additionally cut by way of passing through a CTC-machine. The machine blade has 2-6 teeth per inch. Tea leaves are fermented and fire-dried for fermentation termination. Leaves are dried and sorted to produce black leafy tea. Black leafy tea has the appearance of orthodox leafy tea sized Broken Orange Pekoe or bigger.

Pressure automatic control apparatus for power cylinder of hydraulic press / 2278026
Apparatus includes pump, non-return controlled valve mounted in pressure manifold, pressure regulator with control mechanism communicated with pressure manifold; control unit. Pump is communicated through pressure manifold with power cylinder. Pressure regulator is in the form of hydraulic cylinder with plunger connected between power cylinder and non-return controlled valve. Mechanism for controlling pressure regulator is in the form of rotation motion drive coupled through screw-nut transmission with plunger. Pressure pickup is arranged in cavity of power cylinder and it is electrically connected with control unit. Rotation motion drive operates with possibility of regulating revolution number.

Hydraulic press / 2334619
Press includes working cylinder with plunger, hydraulic unit, pneumohydraulic feed pump, delivery pipe, return cylinders and hydraulic cutoff control valve with electric drive. Analog pressure gauge and electromodulated safety valve are installed in the delivery pipe. Adjustable throttles are installed in discharge line of the working cylinder. Inlets of both throttles are connected to outlets of hydraulic cutoff control valve. Press features programmed control device including programming unit, comparison unit, control units, correction unit. Comparison unit output is connected to the first input of correction unit. The second input of correction unit is connected to programming unit output, while the output of correction unit is connected to the electric input of safety valve.

Hydraulic press / 2356738
Invention is related to the field of metal forming and may be used in pressing of charges from powdery thermoplastic explosive substances. Hydraulic press for pressing of charges comprises working cylinder with plunger, movable plate, hydraulic station, pneumatic hydraulic make-up with electric pneumatic transducer, return cylinders and device for remote control of pressing pressure. Mentioned device includes safety valve, isolating hydraulic distributor with electromagnet coils, two controlled throttles, analog pressure sensor, program control device and analog sensor for control of charge height. The latter comprises immovable metering ruler and marking element. Program control device comprises unit of program selection, unit of pressure comparison, units for control of safety valves, isolating hydraulic distributor, pneumatic hydraulic make-up pump, unit of height comparison and unit of logics.

Hydraulic press / 2393091
Invention relates to material forming and can be used for forming powder-like thermoplastic explosive compositions. Proposed press comprises plate, working cylinder with plunger, working cylinder pressure line, return cylinders, hydraulic unit and program control device. Hydraulic unit comprises motor connected with frequency converter, two hydraulic pumps, variable throttle in working cylinder drain line and analog pressure transducer in working cylinder pressure line. Press incorporates hydraulic lock, electrically-controller hydraulic control valves and press plate top position pickup. Second hydraulic pump pressure line is connected via electrically-controller hydraulic control valve to first inlet of hydraulic lock. Its second inlet is connected with return cylinders working chambers, and its outlet communicates with working cylinder pressure line. Program control device incorporates pressure control unit.