Method and Configuration for Dynamic Control of the Liquid Supply to a Moisturizing Storage Means
First Claim
1. A method for dynamic control of a liquid supply to a moisturizing storage device for a glued edge of an envelope flap of letter envelopes, by which the letter envelopes are sealed, which comprises the steps of:
- taking a measurement of a sealing liquid stored in a tank of a moisturizing apparatus resulting in a measured value;
performing a subsequent qualitative analysis for determining a nature of the sealing liquid used on a basis of the measured value and of at least one material parameter functioning as a comparison value;
taking at least one further measurement of an amount of the sealing liquid stored in the moisturizing storage device resulting in a further measured value reflecting sealing liquid consumption; and
performing dynamic control of a supply of the sealing liquid to the moisturizing storage device in dependence on the material parameter and the further measured value.
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Accused Products
Abstract
A method and a configuration provide dynamic control of a liquid supply for a moisturizing storage device for sealing glued edges of a envelope flap of letter envelopes. Once a measured value has been measured for a sealing liquid which is stored in the tank of a moisturizing apparatus, the type of sealing liquid that is used is qualitatively analyzed on the basis of the measured value and of at least one material parameter as a comparison value. The amount of liquid stored in the moisturizing storage device is then measured by at least one further measurement to allow dynamic control of the liquid supply to the moisturizing storage device as a function of the material parameter and of at least one measured value, which is related to the liquid consumption, in the result of the at least one measurement of the amount of liquid stored in the moisturizing storage device.
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Citations
25 Claims
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1. A method for dynamic control of a liquid supply to a moisturizing storage device for a glued edge of an envelope flap of letter envelopes, by which the letter envelopes are sealed, which comprises the steps of:
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taking a measurement of a sealing liquid stored in a tank of a moisturizing apparatus resulting in a measured value; performing a subsequent qualitative analysis for determining a nature of the sealing liquid used on a basis of the measured value and of at least one material parameter functioning as a comparison value; taking at least one further measurement of an amount of the sealing liquid stored in the moisturizing storage device resulting in a further measured value reflecting sealing liquid consumption; and performing dynamic control of a supply of the sealing liquid to the moisturizing storage device in dependence on the material parameter and the further measured value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A configuration for dynamic control of a liquid supply to a moisturizing storage device for a moisturizing apparatus for application of a sealing liquid to envelope flaps of letter envelopes and having a tank for storing the sealing liquid, the configuration comprising:
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a pump for supplying the moisturizing storage device with the sealing liquid from the tank; an evaluation and control circuit; at least one sensor electrically connected to said evaluation and control circuit and disposed in an area of the moisturizing storage device in a movement path of the envelope flaps, said sensor producing a signal to initiate said pump when an envelope flap passes said sensor; electrodes including device electrodes disposed in the moisturizing storage device and form at least one first and second measurement cell and tank electrodes defining a third measurement cell disposed in said tank, said electrodes connected during operation to said evaluation and control circuit; said evaluation and control circuit programmed to; on wetting of said tank electrodes of said third measurement cell by the sealing liquid, measure a resistance measured value of the sealing liquid stored in the tank of the moisturizing apparatus; perform a subsequent qualitative analysis for determining a nature of the sealing liquid used on a basis of at least one of a determined electrical conductance and a determined specific electrical conductivity and at least one corresponding material parameter functioning as a comparison value; carry out measurements of further resistance measured values corresponding to an amount of the sealing liquid stored in the moisturizing storage device; and carry out dynamic control of the liquid supply to the moisturizing storage device in dependence on the corresponding material parameter and of at least one of the further resistance measured values or a conductance determined from the further resistance measured values or a corresponding value of a specific electrical conductivity determined during the measurements of the amount of the sealing liquid stored in the moisturizing storage device. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
further comprising electrical lines connecting said device electrodes disposed in the moisturizing storage device, defining said first and said second measurement cell, to said measurement circuit; wherein said measurement circuit together with said first and second measurement cells define voltage dividers, said voltage dividers include a first voltage divider having a first series resistance connected in series with a first resistance resulting from a first specific electrical conductivity of the sealing liquid and of geometric dimensions of the first measurement cell, and a second voltage divider having a second series resistance connected in series with a second resistance resulting from a second specific electrical conductivity of the sealing liquid and geometric dimensions of the second measurement cell, as a result of wetting of the moisturizing storage device with the sealing liquid at mutually opposite points; and wherein said AC voltage source is connected within said instrument transformer via said first and second series resistances.
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20. The configuration according to claim 19, wherein said AC voltage source produces a balanced AC voltage with an undefined waveform at a frequency in a range from 50-120 Hz.
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21. The configuration according to claim 19, wherein:
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said instrument transformer has a changeover switch with a switching means, a main contact, an output and input contacts; said instrument transformer has an impedance converter, a precision rectifier, a sample and hold circuit, and an analog/digital converter; and each of said voltage dividers within said instrument transformer has a center tap electrically conductively connected to in each case to one of said input contacts of said changeover switch, and can be connected via said switching means to said main contact of said changeover switch for measuring a measurement voltage at said center tap of said first voltage divider, with said main contact at said output of said changeover switch being connected via said impedance converter, said precision rectifier and said sample and hold circuit to said analog/digital converter.
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22. The configuration according to claim 21, wherein:
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said evaluation and control circuit has a microprocessor; and said changeover switch has electronically controllable switches to form an analog multiplexer and, for control purposes, is connected to said microprocessor of said evaluation and control circuit.
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23. The configuration according to claim 10,
further comprising an insulated double line; -
wherein said instrument transformer has connecting terminals; wherein said third measurement cell is attached internally to a closure piece of the tank, said third measurement cell electrically connected via said insulated double line to said connecting terminals of said instrument transformer of said input/output unit of said evaluation and control circuit, said evaluation and control circuit allowing an electric alternating current to flow via said electrodes through the sealing liquid and evaluates a voltage drop; wherein said evaluation and control circuit has a bus, a microprocessor, a program memory, a non-volatile memory and a main memory connected for digital evaluation during operation to said microprocessor; and said microprocessor, said program memory, said non-volatile memory and said main memory are coupled via said bus to said input/output unit.
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24. The configuration according to claim 16, wherein said row is disposed in a direction of a force of gravity.
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25. The configuration according to claim 9, wherein said electrodes have a formed selected from the group consisting of hollow cylinders and ring electrodes.
Specification