Author: claimsbot

1. A process for preparing a low-odor hydrogel-forming acrylic acid polymer, which comprises the steps of:
a) preparing a polymeric hydrogel by free-radically polymerizing a monomer composition comprising at least 50% by weight of acrylic acid containing volatile saturated carboxylic acids selected from the group consisting of acetic acid, propionic acid and combinations thereof as impurities in a total amount of less than 400 ppm, by weight, based on the amount of acrylic acid, in an aqueous polymerization medium and converting said hydrogel into a particulate hydrogel or into hydrogel-forming powder; and
b) treating said particulate hydrogel or said hydrogel-forming powder with a crosslinking substance which, actually or latently, contains at least two functional groups capable of reacting with the carboxyl groups on the addition polymer.
2. The process as claimed in claim 1, wherein the acrylic acid polymerized in step a) is an acrylic acid obtained by a single or multiple stage crystallization of a crude acrylic acid having an acetic andor propionic acid content in the range from 0.1 to 5% by weight.
3. The process as claimed in claim 2, wherein the acrylic acid monomer of step a) is obtained by single or multiple stage crystallization of said crude acrylic acid at a temperature ranging from 0 to 13\xb0 C.
4. The process as claimed in claim 1, wherein the acrylic acid monomer of step a) is in the form of a partially or completely neutralized aqueous acrylic acid solution.
5. The process as claimed in claim 1, wherein the crosslinker in step b) is selected from compounds capable of forming ester groups with the carboxyl groups on the addition polymer.
6. The process as claimed in claim 1, wherein the monomer mixture to be polymerized in step a) comprises, based on its total weight,
from 50 to 99.99% by weight of acrylic acid as monomer A,
from 0 to 49.99% by weight of one or more monoethylenically unsaturated monomers B which are copolymerizable with acrylic acid, and
from 0.01 to 30% by weight of at least one crosslinking compound C.
7. The process as claimed in claim 1, wherein the acrylic acid monomer contains not more than 300 ppm of acetic acid, propionic acid or combinations thereof.
8. The process as claimed in claim 1, wherein the acrylic acid monomer contains not more than 200 ppm of acetic acid, propionic acid or combinations thereof.
9. A hydrogel-forming addition polymer obtainable by a process as claimed in claim 1.
10. A method for preparing a hygiene article comprising:
forming the hydrogel-forming addition polymer as claimed in claim 9 into a shape of said hygiene article.
11. Hygiene articles comprising an absorbent core which contains at least one hydrogel-forming addition polymer as claimed in claim 9.

The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

What is claimed is:

1. A control method of a lockup clutch comprising:
eliminating a loss stroke of a piston by a pre-charged hydraulic pressure;
increasing a force applied to the piston by further supply of the hydraulic pressure after the pre-charge;
controlling a slip rotation speed between a pump impeller and a turbine runner in a torque converter connected to an automatic transmission; and
determining a time for performing the pre-charge when a shift stage of the automatic transmission is under a neutral state and a vehicle is substantially stopped.
2. A control method of a lockup clutch according to claim 1, wherein the time for performing the pre-charge is determined based on a required time from starting the pre-charge of the hydraulic pressure until the slip rotation speed reaches equal to or less than a predetermined value.
3. A control method of a lockup clutch according to claim 1, wherein the time for performing the pre-charge is determined based on a required time from starting the pre-charge of the hydraulic pressure until a difference between the slip rotation speed under no-operation of the lockup clutch and the slip rotation speed during an operation of the lockup clutch becomes equal to or greater than a predetermined value.
4. A control method of a lockup clutch according to claim 1, wherein the time for performing the pre-charge is determined based on a required time from starting the pre-charge of the hydraulic pressure until increasing the rotation number of the turbine runner to be equal to or greater than a predetermined value.
5. A control method of a lockup clutch according to claim 2, wherein the pre-charge of the hydraulic pressure is performed for a predetermined time from a start of the pre-charge of the hydraulic pressure until immediately before elapsing of the required time.
6. A control method of a lockup clutch according to claim 3, wherein the pre-charge of the hydraulic pressure is performed for a predetermined time from a start of the pre-charge of the hydraulic pressure until immediately before elapsing of the required time.
7. A control method of a lockup clutch according to claim 4, wherein the pre-charge of the hydraulic pressure is performed for a predetermined time from a start of the pre-charge of the hydraulic pressure until immediately before elapsing of the required time.

1. A printed circuit board comprising:
a base insulating layer;
a plurality of signal lines arranged on said base insulating layer, each signal line including a first end, a second end and a wide part between the first end and the second end, the wide parts of the plurality of signal lines arranged in a staggered manner on the base insulating layer;
a cover insulating layer that is provided on said base insulating layer so as to cover at least said wide parts of said plurality of signal lines; and
a conductive layer that is provided on said cover insulating layer,
wherein each of the plurality of signal lines includes a capacitive element, the capacitive element comprising the respective wide part, the cover insulating layer and the conductive layer, such that when a signal is transmitted by a signal line, a harmonic of the signal is removed by the capacitive element of that signal line.
2. The printed circuit board according to claim 1, further comprising a ground line that is provided on said base insulating layer, wherein
said conductive layer is electrically connected to said ground line.
3. The printed circuit board according to claim 2, wherein
said cover insulating layer is formed so as to cover said ground line and said signal line, and
said cover insulating layer includes a through hole for electrically connecting said ground line and said conductive layer.
4. The printed circuit board according to claim 1, wherein said signal line includes a plurality of said wide parts.
5. A printed circuit board comprising:
a base insulating layer;
a plurality of signal lines that are provided on said base insulating layer, the plurality of signal lines including wide parts;
a cover insulating layer that is provided on said base insulating layer so as to cover at least said wide parts of said plurality of signal lines; and
a conductive layer that is provided on said cover insulating layer so as to cover a portion above said wide parts of said plurality of signal lines, wherein
said wide parts of said plurality of signal lines are arranged in a staggered manner,
wherein each of the plurality of signal lines includes a capacitive element, the capacitive element comprising the respective wide part, the cover insulating layer and the conductive layer, such that when a signal is transmitted by a signal line, a harmonic of the signal is removed by the capacitive element of that signal line.
6. A printed circuit board comprising:
a base insulating layer;
a plurality of signal lines that are provided on said base insulating layer, the plurality of signal lines including wide parts;
a cover insulating layer that is provided on said base insulating layer so as to cover at least said wide parts of said plurality of signal lines; and
a conductive layer that is provided on said cover insulating layer so as to cover a portion above said wide parts of said plurality of signal lines, wherein
said wide parts of said plurality of signal lines are arranged in a staggered manner, and
one end of each of said plurality of signal lines is exposed from one end of said cover insulating layer.

The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

1. A desk with a double desk plates comprising:
a main desk plate with a larger plane area;
a secondary desk plate with a smaller plane area;
a leg assembly for supporting the main desk plate;
a removable shelf connecting to a bottom of the main desk plate,
a fixing shelf for connecting the removable shelf and the leg assembly;
a supporting stand for connection the secondary desk plate to the fixing shelf; and an original position of the secondary desk plate overlapping an upper space of the main desk plate.
2. The desk with a double desk plates as claimed in claim 1, wherein the removable shelf has a pair of parallel holders; the holders are connected respectively with lateral sides of a bottom of the main desk plate; and between the two holders has at least one crossbeam for connecting the two holders.
3. The desk with a double desk plates as claimed in claim 2, wherein between the two holders and the fixing shelf has a first sliding stick and a second sliding stick connecting respectively with the two holders; the first sliding stick and the second sliding stick are covered respectively by a first sheath and the second sheath; the first sheath and the second sheath are respectively shorter than the first sliding stick and the second sliding stick; and one end of the each sheath is fixed on the fixing shelf firmly.
4. The desk with a double desk plates as claimed in claim 3, wherein each of the two ends of the holders is extended with a connecting sheet toward the fixing shelf so as to connect the first sliding stick and the second sliding stick; a first positioning screw bolt and a second positioning screw bolt are installed on surfaces of bottoms of the first sheath and the second sheath, respectively; each the positioning screw bolt is capable of stretching into the sheath, and being in contact with the sliding stick so as to fix and press the sliding stick firmly.
5. The desk with a double desk plates as claimed in claim 3, wherein a fixing plane of the crossbeam at a reserved position is connected with a third sliding sheath parallel with the first sheath and the second sheath; a third sliding stick is sheathed into the third sliding sheath; and the two ends of the third sliding sheath are fixed on the fixing shelf firmly.
6. The desk with a double desk plates as claimed in claim 2, wherein the main desk plate has a first main desk plate, a second main desk plate and a third main desk plate; the second main desk plate and the third main desk plate are positioned respectively on a left and a right of the first main desk plate; the second main desk plate and the third main desk plate are fixed respectively on the holders of the removable shelf; a front edge of two lateral sides of the first main desk plate is protruded out with two pivots; the second main desk plate and the third main desk plate corresponding to the pivots have respectively connecting pieces for connecting pivotal receivers so as to sheath the pivot; and each the pivot is capable of moving around in the pivotal receiver.
7. The desk with a double desk plates as claimed in claim 3, wherein the main desk plate has a first main desk plate, a second main desk plate and a third main desk plate; the second main desk plate and the third main desk plate are positioned respectively on a left and a right of the first main desk plate; the second main desk plate and the third main desk plate are fixed respectively on the holders of the removable shelf; a front edge of two lateral sides of the first main desk plate is protruded out with two pivots; the second main desk plate and the third main desk plate corresponding to the pivots have respectively connecting pieces for connecting pivotal receivers so as to sheath the pivot; and each the pivot is capable of moving around in the pivotal receiver.
8. The desk with a double desk plates as claimed in claim 6, wherein a connecting support is installed on the crossbeam toward the leg assembly at a vertical direction; the other end of the connecting support is connected with an air pressure tube; the other end of the air pressure tube is connected with a free end of the first main desk plate; by a motive force produced by the air pressure tube, and a free end of the first main desk plate is capable of rotating around the pivot as well as being retained at a reserved positioned.
9. The desk with a double desk plates as claimed in claim 1, wherein an arranging box is installed in a hollow position of the fixing shelf; and a bottom of the arranging box has a plurality of holes.
10. The desk with a double desk plates as claimed in claim 2, wherein an arranging box is installed in a hollow position of the fixing shelf; and a bottom of the arranging box has a plurality of holes.