Abstract: A novel method and apparatus for producing an endless flexible seamed belt using templates is disclosed. A first form of the template is a mask template with a template aperture in the form of a puzzle cut pattern to be used in combination with an excimer laser. The template is placed between the excimer laser source and the belt material to be cut. As the excimer laser traverses the width of the belt, the laser forms a puzzle cut pattern on the belt. A second form of the template is a punch and die having patterned edges in the form of a puzzle cut pattern with extremely small nodes and kerfs. The cutting tolerances of the patterned edges make it necessary to fix the punch with respect to the die so that there is no misalignment of the punch and die between cutting operations. This is accomplished by resiliently fixing the punch to the die, rather than having the punch attached to the force generating assembly as in normal punch and die assemblies.

Abstract: A novel method and apparatus for producing an endless flexible seamed belt using a punch and die is disclosed. The punch and die have patterned edges in the form of a puzzle cut pattern with extremely small nodes and kerfs. The cutting tolerances of the patterned edges make it necessary to fix the punch with respect to the die so that there is no misalignment of the punch and die between cutting operations. This is accomplished by resiliently fixing the punch to the die, rather than having the punch attached to the force generating assembly as in normal punch and die assemblies. Belt material is positioned between a stock gap between the punch and die and the force generating assembly is activated to provide the cutting force. Once the belt material is cut, the cutting force is removed and the force generating assembly returns to its retracted position. There are two cutting edges on the punch and die so that a first end of one belt and a second end of another belt are formed in a single cutting operation.

Abstract: A combination slicer and toaster which is particularly suitable for slicing and toasting bagels and other similar food items, which comprises in combination a slicing section and a toasting section, such that a bagel, or other similar food item, is inserted into an opening slot in one end of the slicing section, wherein said bagel or other food item is forced into intimate contact with a slicing means located within the slicing section by the downward action of a plunger means located in rotational contact with the opening slot. Upon passing through the slicing section, the bagel is simultaneously deposited in the toasting section of the device, where the now sliced food item is toasted and, upon completion of the toasting operation, is elevated through an exit slot in the other end of the device.

Abstract: The present invention relates to a media cutting tool for use with a template. The apparatus of the present invention maintains proper alignment with a template through the use of a novel offset, rotating, cutting blade and guards against skipping along the cut as the apparatus is drawn around a template through the use of a novel guide mechanism which engages the template being traced. The present invention also employs a transparent handle for an improved view of the cutting area.

Abstract: An apparatus for the rapid removal of an extraneous portion of a produce item with minimal loss. The apparatus, rendered attachable to an agricultural processing implement by an integral attachment device, enables one-handed operation by a user. The apparatus includes a base section in operative combination with an elevated blade that not only enables the severing of the extraneous portion from the produce body, but also separates the extraneous portion therefrom, and guides the cleaned produce body towards a collection device, for instance, a picking box.

Abstract: A neck for an acoustic guitar made from a plywood material which is glued with and at least partially impregnated with a phenolic resin. The plywood neck is stronger and more durable than conventional neck structures and requires no further finishing steps during manufacture other than sanding and buffing. Preferably, a fingerboard made of a high pressure laminate material is adhesively secured to the neck. In addition, a bridge made of the same type of high pressure laminate as the fingerboard is preferably attached to the soundboard of the guitar body.

Abstract: In a novel fret system for stringed musical instruments, the fret bar can be fabricated from standard square metal stock, typically of stainless steel. Each fret bar is retained in a corresponding transverse channel machined in the fingerboard surface region of the neck/fingerboard with a conforming cross-sectional shape that locates the main portion of the fret bar recessed into the neck/fingerboard with one corner portion extending through the channel opening in the fingerboard surface, thus forming a fret tip of desired height at the apex of a 90 degree angle. The fret bar is inserted endwise into its channel in the neck/fingerboard where it is retained securely. This system has proven beneficial both for the “feel” of playing the instrument in tapping and conventional modes and for precision and uniformity in manufacture.

Abstract: The present invention provides a method for automatically tuning a stringed instrument including the steps of inducing a signal on a string under tension to generate a resonance signal having an amplitude from the string and adjusting tension of the string in response to the amplitude of the resonance signal. The present invention also provides a system for automatically tuning a stringed instrument including a string, tensioning means operably attached to one end of the string for tensioning the string, and a processor for driving the tensioning means to induce a signal on the string and generate a resonance signal having an amplitude from the string and for adjusting tension of the string in response to the amplitude of the resonance signal.

Abstract: The present invention provides apparatus for, and novel methods of representing the content of a musical score in an animated format that graphically prompts the user of a keyboard instrument. The graphic format elucidates features of the score in a way that may also be useful as a supplement to conventional keyboard instruction. The animation is displayed on the screen of a computer monitor together with a live video image of the user's hands on a musical keyboard. Viewing only the images on the monitor, the user guides his fingers to the keys targeted by the animation. He is thus able to play the proper keys on the real keyboard without diverting his eyes from the monitor. In the preferred embodiment, the system provides a real time display of both the score information, keyboard and the user's hand placement relative to the keyboard. Preferably, the display of the musical score includes a note position depicted in a horizontal relationship to the keyboard, and includes a temporal indication for the notes.

Abstract: An electronic device and method for objective testing of proficiency in the performance of scales, arpeggios, and other standard musical exercises, and for evaluating the results according to recognized standards of perfect pitch and rhythm. A combination of microprocessor, digital signal processor, memory, and user interface (2, 5, 8, 3) creates and stores a test sequence as played by a musician, and also the same test sequence as produced by the testing device, the latter being made audible during the test (6). The microprocessor then analyses and compares the two versions of the test sequence, sending various kinds of reports to the output printer or video display (7).

Abstract: A remix apparatus and method and slice apparatus and method is provided, which are capable of generating new musical tone pattern data from previously generated musical tone pattern data in real time, and storage media storing programs for implementing these methods. Musical tone pattern data of a predetermined length stored in a flash memory or a RAM is divided into a plurality of musical tone piece data of a length smaller than the predetermined length, and location information indicative of locations in the flash memory where the musical tone piece data obtained by the division are stored is stored in the flash memory.

Abstract: With music data made up of four instrument/vocal parts of, e.g., a piano, base, drums, and vocals, project data handled by a management center is configured of tracks with each part existing independently. Tracks 1 through 4 each have independent copyright information, which is to say that even in the event that the tracks 1 through 4 are each created by different creators, copyright information is recorded to each of the tracks 1 through 4, and even in the event that a track for a new part is added to the project data for example, thereby generating different project data, the copyright information on each track is not deleted. Thus, music data made up of multiple tracks having copyright information on each track can be distributed.

Abstract: A musical sound generator combines a software processing and a hardware processing. A sub CPU210 generates musical note data based on the musical score data 340. Main CPU110 refers to a sound source file, converts musical note data and generates PCM data. A sound processor 210 converts the musical note data at a sound synthesis circuit 221 to generate PCM data. D/A converter 222 converts the PCM data into analog signals. The speaker 300 receives the signals and emits the sound.

Abstract: The present invention provides a control booster which is capable of appropriately detecting a pedal-operated brake operation during an automatic brake operation. For moving a stop key from a position on a side of a rear-side abutment surface (where a reaction force of a switch acting on a switch operating rod and a spring force of a switch spring are balanced) toward an intermediate position, when the stop key is located on a side of the rear-side abutment surface, only a return force of the spring acts on a contact operating element of the switch. On the other hand, when the stop key moves toward the intermediate position, an abutment portion is separated from the contact operating element (that is, the switch operating rod moves in a direction for separation relative to the switch), so that no load is applied to the contact operating element.

Abstract: A three-position stop type swing actuator has a main piston freely moving in forward and backward directions in an axial direction within a casing, an output shaft placed at a coaxial position with the main piston in such a manner as to be fixed in an axial direction and freely rotate around an axis, a conversion and transmission mechanism converting a forward and backward motion of the main piston into a rotating and swinging motion of the output shaft, and a sub piston having a stroke smaller than that of the main piston a fluid pressure operating force larger than that of the main piston and arranged within the casing in such a manner as to freely move in the forward and backward directions and be capable of being brought into contact with the main piston so as to restrict a middle stop position of the main piston.

Abstract: A pivot-chuck actuator has a housing extending along an axis and formed centered on the axis with a piston chamber and a vane chamber offset and separate from the piston chamber. A piston axially displaceable in the piston chamber is axially fixed to a shaft extending from the housing on the axis. A vane element on the shaft angularly subdivides the vane chamber into a pair of angularly offset compartments and formations rotationally couple the vane element to the shaft for joint rotation therewith while permitting relatively axial movement of the vane element and shaft. The compartments cam be alternately pressurized to rotate the vane element and shaft about the axis. A pair of counterweights angularly fixed on the shaft axially flank the vane element. Formations rotationally couple the counterweights to the shaft for joint rotation therewith while permitting relative axial movement of the counterweights and shaft.

Abstract: By changing the inclination of a cam plate, the stroke of a piston is changed to change the discharge displacement a of compressor. A hinge mechanism is positioned between a rotating support and the cam plate. The hinge mechanism includes a guide pin, and the guide pin transfers the rotational motion of the rotating support to the cam plate and permits inclination of the cam plate. At least a part of the guide pin is hollow.

Abstract: An airless spray pump has a drive train is comprised of a motor having an output gear thereon which drives a combination gear assembly comprised of two gears mounted on a shaft which in turn drives a crank assembly which is comprised of a one-piece eccentric end gear molded together and mounted on a shaft which is supported at both ends to prevent cantilevering and attendant stresses. The crank assembly is offset from the vertical axis of the displacement pump in order to reduce side-loading thereon. A connecting rod is mounted via a pin directly to the top of the displacement rod of the reciprocating pump. Retainer pin clippingly retains the pin in the connecting rod and enables the pin to be removed for servicing without the use of tools other than potentially a screwdriver or other generic tool.

Abstract: Apparatus for the preparation of gas mixtures includes cylinder which is divided into two chambers by means of a fixed central barrier. This barrier has a central orifice for receiving a rod which has central portion of diameter corresponding with the diameter of the orifice. The rod has end portions which pass through end plates of the cylinder and these end portions have a small diameter than that of the central portion, the diameters of the end portions being equal. A valved passage for the gases of either chamber to be transferred to the other chamber is provided in the barrier and a stepper motor is used to move the rod over small distances; with means to introduce or withdraw gas from either chamber.

Abstract: A piston (10) particularly suited for heavy duty diesel engine applications includes upper and lower crown sections (28, 30) joined by a friction weld (32) to define an annular ring belt (14) formed with ring groves (22) and having a lower end (20) and an internal piston cooling chamber (34). A pair of pin bosses (40) depend from the ring belt (14) and are formed as one piece with the lower crown section (30). A skirt (46) is also formed as one piece with the pin bosses (40) and has an upper end (48) that is spaced from the lower end (20) of the ring belt (14) to define a space (52) therebetween which effectively uncouples the skirt (46) from the ring belt (14).

Abstract: Processes and systems to recover at least one perfluorocompound gas from a gas mixture are provided. In one embodiment the inventive process comprises the steps of a) providing a gas mixture comprising at least one perfluorocompound gas and at least one carrier gas, the gas mixture being at a predetermined pressure; b) providing at least once glassy polymer membrane having a feed side and a permeate side; c) contacting the feed side of the at least one membrane with the gas mixture; d) withdrawing from the feed side of the membrane as a non-permeate stream at a pressure which is substantially equal to the predetermined pressure a concentrated gas mixture comprising essentially the at least one perfluorocompound gas; and e) withdrawing from the permeate side of the membrane as a permeate stream a depleted gas mixture comprising essentially the at least one carrier gas.

Abstract: A air dryer uses high voltage direct current to cause moisture to condense out of an airflow in contact with a network of needles creating a high intensity electric field within grounded shields. The moisture is collected in a basin positioned below the needles.

Abstract: A chemical filter is provided with an adsorbent filter medium for removing gaseous impurities and agglutinating organic substances in the air. The adsorbent filter medium is of a corrugated honeycomb structure comprising fiber material and is a fiber base paper having an interfiber void ratio of 80 to 95% upon which a gas adsorbent or a gas reactant has been deposited. As a result, using fiber which contains substantially no boric oxide as the absorbent fiber medium enables contaminants generated from the chemical filter itself to be removed, and therefore improves the yield of semiconductors and precision electronic components manufactured. Moreover, the amount of active carbon deposited is markedly high, and thus, if impregnated with a reactant, the amount of reactant deposited is able to be increased, leading to superior removal performance with respect to gaseous contaminants as well as reduced pressure loss and longer life of the filter.

Abstract: A system and a method for recovering energy from a low temperature factory exhaust gas are disclosed. In the system, a heat exchanger is added between a wet scrubber and a cooling tower such that a low temperature scrubber exhaust gas can be utilized to decrease the temperature of a heat transfer medium used in the cooling tower. The lower temperature cooling tower water therefore increases the efficiency of cooling in a chiller connected to the cooling tower. Furthermore, the increased scrubber exhaust gas temperature reduces its opacity to fulfill requirement of environmental protection regulations. The lower water temperature in the cooling tower further reduces water evaporation rate and therefore reduces water consumption due to evaporation.

Abstract: A bleed valve for introducing bled fluid to a mainstream fluid flowing through apparatus across which a pressure differential occurs, characterized in that the bleed valve is adapted to open so as to bleed fluid into the mainstream fluid when the pressure differential across the apparatus falls below a predetermined value. This arrangement is particularly appropriate to vacuum cleaners incorporating cyclonic dust-separating apparatus in that the bleed valve is more reliably operated in response to a reduction in airflow. This ensures efficient functioning of the cyclonic dust-separating apparatus and reduces the risk of overheating of the motor.

Abstract: A hot oil fryer for continuous frying duty in continuous food process lines has a conveyor belt that has an upper food-carrying upper run and a lower return run. Heat input is provided by rectangular or square heat exchanger tubes that are placed directly underneath the food-carrying run in order to support it from sagging as well as cut-down the span between the source of heat flowing inside the heat exchanger tubes and the sink of heat in the food product that is transported on top of the conveyor's food-carrying run. The conveyor includes an entrant ramp section having at least high and low operative positions. The cooking channel at the intake end is provided with a series of gutters as well as sediment drains to afford collection and filtration of floating debris as well as sinking debris.

Abstract: A rack for producing transport bundles of stacked lumber comprises a deck over which is laid plural rows of dunnage-and-banding gutters. The which dunnage-and-banding gutters are arranged to define a major channel that has a bottom wall extending between spaced sidewalls and is sized to receive dunnage stock. Two by four lumber (4.5 cm by 9 cm) is common for dunnage stock. The dunnage-and-banding gutters also define a minor channel recessed in the major channel's bottom wall. The minor channel is sized to receive banding material such as strap. Preferably both the dunnage stock as well as the banding can be fed in axially from either open end of the gutters after the lumber has already been stacked up on top.

Abstract: The crown on a steel strip in a rolling mill is controlled by a continuous rotational adjustment of an arbor in response to a control signal representing the current crown profile or deviation therefrom, the arbor being equipped with a curved eccentric contour, bearing rollers surrounding the arbor and a continuous sleeve around the bearing rollers.

Abstract: A marking device comprises: a marking mechanism for marking a surface to be processed, of an object to be marked, by reciprocating a marking portion; a marking portion moving mechanism for moving the marking portion in two-dimensional directions along the surface to be processed; and a pressure adjusting circuit for keeping a constant pressure which the marking portion applies to the surface to be processed; wherein the marking mechanism comprises a cam mechanism for linearly reciprocating the marking portion by following a cam which is rotated by a driving member.

Abstract: A printer of the present invention includes a timing belt passed over drive pulleys, each of which is mounted on a particular print drum, via phase adjusting means and deflection pulleys or rotary members. The deflection pulleys are rotatable in contact with the rear surface of the timing belt. The timing belt has its rear surface ground to have uniform thickness. The printer is free from the deviation of relative phase between the rotary members and offset ghosts ascribable to the irregular thickness of the timing belt, while preserving the low-cost configuration of timing belt connection.

Abstract: A screen-printing apparatus with enhanced accuracy of positioning a mask to a material to be printed, in which a printing table is fixed, the mask is displaced in a right-left direction and a front-rear direction, and rotated in a horizontal plane in accordance with a position confirmation signal from a camera device and the mask, a mask support frame, a squeegee device are moved up and down together at a predetermined timing at every printing step.

Abstract: It is possible to obtain a screen printing method that may assure excellent printing qualities since the screen printing method of the present invention includes: (A) sliding a squeegee head with paste stored in the squeegee head on a mask plate, while the past is pressurized, and printing the paste on a substrate through pattern holes of the mask plate, (B) at least one step of (b) separating the squeegee head with the paste stored therein from the mask plate, and (e) sliding the squeegee head on the mask plate for a pre-squeezing purpose before the step (A). The step of separating the squeegee head from the mask plate includes the steps of (1) discontinuing the pressure application to the paste stored in the squeegee head, (2) horizontally moving the squeegee head by a predetermined distance while the bottom end portion of the squeegee head is abutted on the mask plate in a state of the pressure application being discontinued, and (3) moving the squeegee head upward off from the mask plate.

Abstract: A device for printing board or cut sections of board comprising a number of print stations through which the board is arranged to pass successively to receive print images from one or more of the print stations and at least one print station. The print station comprising a print cylinder mounted in a laterally displaceable carriage which can be moved laterally away from the board travel line, leaving in place substantially all the remaining parts of the at least one print station, to allow changing of printing plate or plates on the print cylinder while the printing apparatus can continue to operate with one or more of the other print stations.

Abstract: In order to provide a stand of a printing unit of a rotary printing machine, said stand being capable of being produced cost-effectively and having high inherent rigidity, a left-hand and a right-hand side wall are placed onto a bottom plate and screwed to the latter and are also provided with a cover plate, the cover plate resting with first locating faces on the side walls and with second locating faces against the side walls, the cover plate being screwed to the side walls at all the locating faces.

Abstract: A roller structure in a printing press includes a dampening form roller, gear, belt, belt roller, clutch member, nut, movable element, and snap rings. The dampening form roller is supported rotatably and adapted to come into contact with a plate cylinder and oscillating roller, having different peripheral surface speeds, at their outer surfaces. The gear, belt, and belt roller transmit rotation of one of the plate cylinder and oscillating roller to the dampening form roller. The clutch member, nut, movable element, and snap rings connect/disconnect the gear, belt, and belt roller. When the gear, belt, and belt roller are disconnected by the clutch member, nut, movable element, and snap rings, the dampening form roller is rotatably driven by the other one of the plate cylinder and oscillating roller.

Abstract: A device for guiding material webs (A through D; E through H) via an angle-bar deck (2), including a folding section that is arranged on a plurality of planes (3.1, 3.2, 3.3), from where the material webs (A through D), (E through H) enter folding apparatuses (4), (5). Accommodated on longitudinal folding devices (8), (9) are infeed elements (7), which have guide sections (13), (14) that are able to be operated independently of one another.

Abstract: The invention is directed to a printer having a device for printing a data carrier. It is proposed providing the data carrier with at least one transponder chip (26) and equipping the printer with a device for driving the transponder chip (26). This makes it possible to print the data carrier simultaneously or sequentially and to write data into, or read data out of, the transponder chip.

Abstract: A printing cylinder of a printing machine that can be immersed in an ink pan is provided with a doctor blade that can be adjusted to it. In order to prevent ink from spraying outward, rings are placed that can rotate freely, but cannot be moved in the axial direction, and carry holding arms that hold wipers in the region between the ink pan and the doctor blade. The rings are held by torque supports in such a way that they cannot rotate with respect to the machine frame.

Abstract: A flexographic printing plate having solid image areas which are covered by a plurality of very small and shallow cells similar to the ink carrying cells found in anilox ink metering rolls. These cells fill with ink during the plate inking step and reproduce solid image areas with better color saturation while at the same time reducing the halo typical of flexographic printing of solids. Associated with this plate is a method for producing the cells, including the use of an intermediate screened film and of a computer program for generating the film intermediate.

Abstract: The invention concerns a method and a device for cleaning guide rollers of a web printing press having a printing material web guided by a number of guide rollers, wherein cleaning liquid is applied onto the printing material web, is transported and transferred by same to the guide rollers and wherein the guide rollers to be cleaned are decelerated or accelerated while the printing material web is running, to generate slippage for removing the soiling. The printing material web is guided along a container for applying the cleaning liquid such that it has direct contact with the cleaning liquid contained in the container and thus automatically accepts cleaning liquid. In a preferred fashion, the sealing lip is elastically deformable for passing the cleaning liquid to the printing material web.

Abstract: In an erasing and cleaning device for cylindrical surfaces, in particular of printing-form and rubber-blanket cylinders of a printing machine, with the aid of a cleaning cloth capable of being moved by cleaning-cloth transport means, the cleaning-cloth transport means comprising a fresh-cloth roll, a pressure element, which presses the cleaning cloth against the cylindrical surface, and a dirty-cloth roll for receiving the spent cleaning cloth and cooperating with a positioning unit for the operating position and a drive, to make it easier to change the cleaning cloth and to achieve a reduction in the time taken by this change and, moreover, to make this erasing and cleaning device capable of being used universally, there is provision for the cleaning-cloth transport means together with the cleaning cloth, to be packaged in an independent cassette and to be exchangeable in this form and for the positioning unit, in the form of a running mechanism with a drive for the cassette, to be arranged permanently as a

Abstract: A roller lock for releasably fastening a roller in a printing machine includes a pressure piece for retaining the roller, the pressure piece serving for exerting a retention force on a shaft journal of the roller, and the roller having two stops between which a central axis of the roller extends, both a force action line of the retention force of the pressure piece exerted on the axle journal of the roller, and a force action line of a contact force exerted on a bale of the roller being directable through the central axis; and a printing machine having the roller lock.

Abstract: A method is provided of modifying pulsed image data signals for controlling an acousto-optic modulator in an image setter system. The method comprises modifying the pulse widths of the image data signals in accordance with predetermined parameters so as to improve the correspondence between the data representing the image and the data recorded on the record medium. Following modification the data signals are supplied to the acousto-optic modulator.

Abstract: A printing machine includes an observation window, and at least one element selected from the groups consisting of control elements and display elements disposed in the vicinity of the observation window, the at least one of the control and display elements being disposed in the observation window so that, at least in part, it is possible to see a product of the printing machine through the window.

Abstract: A toy racing car or other vehicle for operating on conventional track of a given scale a comprises a sub body, including a chassis, motor and gear set, pickup shoes and drive wheels, and a visible body of much larger scale, with large scale rear drive wheels. In one embodiment, the body is pivoted to the sub body, so as to swing outwardly in turns, simulating a broadsliding race car; large scale front wheels are carried by the sub body, so as to simulate countersteering. A toy motorcycle similarly comprises a sub body and modeled motorcycle components; the front wheel and fork of the motorcycle remain upright in turns, while the rider and frame lean over, simulating a motorcycle leaning in a turn.

Abstract: A traction drive system includes an endless member having a coupling couplable to a vehicle. A pair of rotating wheels support the endless member for rotation in a closed path. A drive assembly includes at least a pair of counter-rotating drive wheels wherein the drive wheels of the pair of counter-rotating drive wheels are disposed on opposite portions of the endless member to apply a driving force thereto. Each drive wheel is operably coupled to a drive motor.

Abstract: An ultraviolet radiation curable ink is provided, which does not make the printed image hazy or blurred, and does not drip or leak from the ink container or printing drum, hence being excellent in both printability and operability. The ultraviolet radiation curable ink comprises an ultraviolet radiation curable resin monomer or oligomer as a varnish, and the ink has a viscosity of 2.0 to 13.0 Pa·s measured at a shear rate of 100 (l/s) at 23° C., and has an yield value of 25 Pa or higher at 23° C. The ink can contain a viscosity regulator, for example, as a powder. It is preferable that the content of powdery ingredients in the ink is 30 wt % or less based on the total weight of the ink.

Abstract: An ink composition of the present invention comprises an oil-based ink and a heat decomposition-type gas-developing agent that generates gas by relatively small amount of heat. A thermal printer using the ink composition is not clogged with the composition even after a long-term storage, and provides a printed matter excellent in water resistance. Thus, the ink composition is remarkably useful for a thermal ink jet printer and a thermal ink permeation printer.

Abstract: A dye which is represented by any of the following general formula (1), (2), (3) or (4), an ink for inkjet recording which contains at least one of the dyes, and an ink jet recording method which uses the ink. The dye has heterocyclic group which may be substituted and has at least one ionic aqueous group in a molecule.

Abstract: A water-based pigment dispersion comprising 100 parts by weight of a pigment, 3 to 30 parts by weight of a sulfonic acid group-containing pigment derivative and water, wherein the sulfonic acid group-containing pigment derivative has only one sulfonic acid group in a molecule of a pigment of which the type is the same as the type of the pigment to be dispersed, the sulfonic acid group forms at least one salt selected from the group consisting of ammonia salt, an organic amine salt and a salt in which at least 15% of the sulfonic acid group is liberated and the rest is a salt with monovalent metal, the content of metal ion having a valence of at least 2 in a solid matter of the above water-based pigment dispersion is 500 ppm or less, and the above pigment is dispersed in water according to electrostatic repulsion due to the sulfonic acid group-containing pigment derivative adsorbed on the particle surface of the pigment, an inkjet recording liquid containing the same and process for the production thereof.