baber/WOPTO huggingface dataset:
Patent IT-1260774-B (IT)
Title: Elastic metal belt for transmissions
IPC: F16G/
Filed: 1992-04-21
Granted: 1996-04-22
Abstract: Elastic trapezoidal metal belt, formed from metal spring strip folded until one gets a continuous ring, welded at the two ends. It is suitable for any type of transmission, especially speed variators with variable pulleys. Its three dimensions, the thickness of the strip, the width of the strip, the height of the corrugation, make it possible to exactly measure the proper ratio between winding flexibility and resistance to stretching. It can operate dry or in an oil bath and advantageously replace the so-called trapezoidal rubber belts, toothed belts, and chains. Having a very considerable coefficient of adhesion to the groove of the pulleys, it is mounted with minimum preloaded pull and regulates itself according to the operating force. <IMAGE>
Patent IT-1252475-B (IT)
Title: Apparecchio pneumatico ad aspirazione per il tensionamento,il rovesciamento e l'allontanamento di un manufatto tubolare a maglia
Inventor: TURINI FRANCESCO
IPC: D06G3/04
Filed: 1991-07-31
Granted: 1995-06-16
Abstract: L'apparecchio comprende un condotto (12) mobile assialmente ed interno ad una parete tubolare (1) per formare con essa una intercapedine (1) con griglia (14) ed una espansione (7) sagomata per cooperare con il bordo superiore del condotto (12), quando questo si solleva per otturarlo e quando questo si abbassa per formare uno spazio anulare; al termine della parete tubolare (1) è previsto un corpo (18) con fori (20) per l'ingresso dell'aria nell'intercapedine (1); il condotto (12) è mobile attraverso un foro centrale 18A del corpo (18) e presenta un collare (24) che ottura i detti fori (20) quando il condotto (12) è sollevato, e presenta fori (26) che a condotto (12) sollevato sono sovrastanti al detto corpo (18) ed a condotto (12) abbassato sono otturati dalla parete del foro (18A); la corrente aspirante è stabilita nel detto condotto (12) durante le due fasi di tensionamento e di rovesciamento.
Patent IT-1253323-B (IT)
Title: Adjustable hook for the hanging and setting of suspended furnishings
Inventor: VERGANI UMBERTO
IPC: F16B/
Filed: 1991-01-24
Granted: 1995-07-18
Abstract: The hanging on a wall of suspended furnishings normally brings up problems caused by the poor geometrical precision of the finish of the walls themselves. The placement of one piece of furnishing next to another, their levelling and their spatial setting to achieve the best aesthetic and functional effect a can be done only if, after the hanging from solid wall supports, it is possible to make appropriate and precise adjustments of the position of the furnishings with respect to the vertical and horizontal planes. The invention proposes to implement these spatial adjustments with a simple, robust, economical, and rapidly and easily manoeuverable device, both at the time of hanging the furnishings and afterwards. <IMAGE>
Patent IT-1254503-B (IT)
Title: Container for the disposal of glass bottles and the like
IPC: B65D/
Filed: 1992-03-05
Granted: 1995-09-25
Abstract: A container for the disposal of bottles which ensures the unusually fast selection of the glass disposed of comprises a casing defining a compartment for storage of the recycled glass, which is accessible from the top via inlet openings formed in the casing and is delimited at the bottom by a base which can be opened and is associated with the casing, as well as a plurality of metal plates supported in a projecting manner inside said compartment and resiliently yielding between a rest position extending nearly horizontally through the compartment and a position folded downwards, for cushioning the falling movement of the bottles. <IMAGE>
Patent IT-1258895-B (IT)
Title: Ventilatore radiale con una girante che ruota in una carcassa a spirale
Inventor: GOEHRE JOCHEN
IPC: F04D17/12
Filed: 1992-05-08
Granted: 1996-03-01
Abstract: Viene proposto un ventilatore radiale che serve a generare un flusso di aria che in qualità d'aria secondaria viene addotto alla corrente del gas di scarico del motore endotermico, specialmente di un autoveicolo. Il ventilatore radiale comprende una girante, che ruota in una carcassa a spirale, ed un'uscita del ventilatore che è disposta nella carcassa ed è orientata all'incirca tangenzialmente. Un ventilatore particolarmente compatto, potente, lo si ottiene quando l'uscita del ventilatore forma con il piano di rotazione della girante un angolo acuto, che converge nella direzione di flusso dell'aria, e sbocca in una camera di convogliamento dell'aria, nella quale elementi convogliatori solidali con la carcassa deviano l'aria che affluisce nella sostanza radialmente rispetto ad un'apertura di sfioro che è orientata nella direzione dell'asse di rotazione della girante e che sbocca nella regione centrale di una seconda carcassa a spirale, nella quale è disposta una seconda girante.(Figura 1).
Patent IT-1255972-B (IT)
Title: Dispositivo per frenare fogli da deporre su una pila, specialmente fogli di carta o cartoncino
IPC: B65H29/24
Filed: 1992-11-27
Granted: 1995-11-17
Abstract: Per frenare fogli (8), specialmente fogli di carta o cartoncino, che dovranno essere deposti su una pila (12) e trasportati su un trasportatore a nastro (7, 9), reciprocamente distanziati in un piano (piano di entrata) sono noti dispositivi presentanti una cinghia (26), che è disposta al di sopra del piano di entrata e di cui un tronco (tronco di frenatura 33) è disposto nell'ambito del piano di entrata, preferibilmente leggermente al di sotto, e si estende parallelamente al piano di entrata oppure estende leggermente inclinato in direzione di movimento dei fogli, ed è accoppiato con un dispositivo di azionamento disuniforme.Secondo l'invenzione il tronco di frenatura (33) della cinghia (26) è sostenuto da un tavolo di aspirazione (34), presenta una superficie di contatto esterna piana con i
Patent IT-1272097-B (IT)
Title: Dispositivo meccanico, applicabile ad impianti per lavorazione e per laproduzione del pane, atto a consentire il ribaltamento automaticoe lo stiramento di porzioni prefermate di pasta
Inventor: VISMARA MARIO ANDREA
IPC: A21C9/08
Filed: 1993-03-16
Granted: 1997-06-11
Abstract: Il presente trovato ha come oggetto un dispositivo meccanico, applicabile ad impianti per la lavorazione e per la produzione del pane, atto a consentire il ribaltamento automatico e lo stiramento di porzioni preformate di pasta, e comprende una struttura metallica, ancorabile alla guida laterale di un nastro trasportatore dell'impianto per la lavorazione del pane, la quale è suscettibile di ruotare basculando attorno ad una coppia di perni, attraverso l'azione di un cilindro idraulico o pneumatico, e che supporta un nastro trasportatore mobile suscettibile di muoversi con moto alternato, e con velocità diverse rispetto a quelle del nastro trasportatore dell'impianto precisato.
Patent IT-1271714-B (IT)
Title: Device for making a layer of batter
Inventor: IORI ANGELO
IPC: A21C/
Filed: 1994-11-09
Granted: 1997-06-04
Abstract: The device comprises a reservoir for the batter, at the bottom of which there is provided a rectilinear slit that can be opened and closed on command, the slit having a length corresponding to the width of the layer of batter to be placed on a surface, and the batter can emerge by gravity through the slit when it is open, the device having means which allow it to move parallel to the aforesaid surface, maintaining the slit at a constant distance from said surface. <IMAGE>
Patent IT-1262626-B (IT)
Title: cabina perfezionata per la smaltatura di prodotti ceramici,in  particolare piastrelle.
Inventor: CASELLI LEPIDO
IPC: B05C/
Filed: 1993-06-04
Granted: 1996-07-04
Abstract: La cabina perfezionata per la smaltatura di prodotti ceramici, in particolare piastrelle, è dotata, in prossimità del tetto, di un disco orizzontale a bordo perimetrale affilato il quale ruota a grande velocità proiettando sulle pareti in continuo lo smalto in eccesso e mantenendo questo sempre fluido per farlo cadere in una sottostante vasca di raccolta e reimmetterlo in ciclo produttivo.
Patent IT-1258450-B (IT)
Title: System of auxiliary conductors associated with alternating current long distance lines and arranged to permit the flow of induced currents able to reduce the magnetic dispersion field otherwise present due to the load currents flowing in the main conductors of the line itself
IPC: H01L/
Filed: 1992-07-24
Granted: 1996-02-26
Abstract: As explained in the specification, the discovery consists in arranging, adjacent, figure 1, and/or connected, figure 2, to the main conductors of long distance alternating current lines, suitable auxiliary conductors, arranged to permit the flow of induced currents able to cancel out the effect due to the load currents flowing in the main conductors of the line itself, these reduce considerably the magnetic dispersion field which would otherwise be present in the space adjacent to the line itself if the system of auxiliary conductors were not present. As presented in the drawing in figures 1 and 2, the presence of the loop created by the auxiliary conductors allows the flowing of a current Ii which, in the shaded zone, tends to cancel the effects of the load current Ic, reducing the magnetic field in the ratio (Ic - Ii)/Ic. Application of the described system can be advantageous when it is necessary to reduce the inconveniences caused by the presence, in proximity to long distance lines, of magnetic fields of considerable magnitude which cannot be eliminated by other systems. <IMAGE>
Patent IT-1272178-B (IT)
Title: Cart for opening and closing manhole covers
Inventor: BATTAGLIA MASSIMO
Filed: 1994-02-22
Granted: 1997-06-16
Abstract: The invention concerns a cart for the opening and closing of manhole covers, comprising a central axle 2 carrying at its ends two wheels 4, a handle element 1, coupled to said central axle 2 so that it can be oriented essentially upward and backward, at least one hooking element 7, 8; 14, 15; 18; 19; 21, 22; 23, 24, which engages with a corresponding grab element on the manhole cover, and at least one batten 5', provided on the handle element 1 or on the central axle 2, so that once the manhole cover has been hooked it can be moved by the cart, always in position parallel to the ground. <IMAGE>
Patent IT-1261097-B (IT)
Title: Procedimento per la fabbricazione di tessuti irrestringibili in lana destinati alla realizzazione di capi di abbigliamento.
IPC: D06M11/54
Filed: 1993-07-09
Granted: 1996-05-08
Abstract: Il procedimento consiste nell'applicare ai tessuti di lana un trattamento chimico di cloraggio del tipo di quelli utilizzati per rendere irrestringibili i filati di lana destinati alla produzione di maglieria, seguito da un trattamento con una soluzione di un ammorbidente, eseguito operando con una soluzione a pH acido.
Patent PT-103725-B (PT)
Title: Chapa de corrente com abas
Inventor: WU DANIEL
IPC: F16G15/14
Filed: 2007-04-23
Abstract: UMA CHAPA DE CORRENTE (1) CONSTITUÍDA POR UM CORPO DE CHAPA (2) E UMA PRIMEIRA ABA (3). O CORPO DE CHAPA (2) APRESENTA: (I) UMA PRIMEIRA SUPERFÍCIE LATERAL (21) ADEQUADA PARA FICAR VIRADA PARA UMA CHAPA DE ENCOSTO (61,62); (II) UMA SEGUNDA SUPERFÍCIE LATERAL (22) OPOSTA À PRIMEIRA SUPERFÍCIE LATERAL (21); E (III) UMA SUPERFÍCIE PERIFÉRICA ANELAR (23) INTERLIGANDO OS CONTORNOS EXTERIORES DAS PRIMEIRA E SEGUNDA SUPERFÍCIES LATERAIS (21, 22) E APRESENTANDO PRIMEIRA E SEGUNDA EXTREMIDADES (231, 231'') OPOSTAS ENTRE SI SEGUNDO UMA DIRECÇÃO LONGITUDINAL. A PRIMEIRA ABA (3) DESENVOLVE-SE INTEGRALMENTE A PARTIR DA PRIMEIRA EXTREMIDADE (231) DA SUPERFÍCIE PERIFÉRICA (23) NA DIRECÇÃO LONGITUDINAL, E APRESENTA UMA PRIMEIRA SUPERFÍCIE LATERAL (31) VIRADA PARA A CHAPA DE ENCOSTO (61, 62). A DISTÂNCIA ENTRE A PRIMEIRA SUPERFÍCIE LATERAL (31) DA PRIMEIRA ABA (3) E A CHAPA DE ENCOSTO (61, 62) É MAIS PEQUENA DO QUE A DISTÂNCIA ENTRE A PRIMEIRA SUPERFÍCIE LATERAL (21) DO CORPO DE CHAPA (2) E A CHAPA DE ENCOSTO (61, 62)
Patent PT-106368-B (PT)
Title: Sistema de caracterização do coeficiente de tranferência de calor na interface polímero-calibrador para aplicação em extrusão de perfis e respetivo método.
Inventor: NÓBREGA JO O MIGUEL DE AMORIM NOVAIS DA COSTA
IPC: G01N25/20
Filed: 2012-06-06
Abstract: A INVENÇÃO CONSISTE NUM SISTEMA QUE PERMITE A CARATERIZAÇÃO DE VALORES DO COEFICIENTE DE TRANSFERÊNCIA DE CALOR NA INTERFACE POLÍMERO-CALIBRADOR, PARA APLICAÇÃO EM EXTRUSÃO DE PERFIS. ESTE SISTEMA TEM A CAPACIDADE DE SER UTILIZADO EM DIVERSAS CONDIÇÔES OPERATÓRIAS DE EXTRUSÃO, NA EXTRUSÃO DE DIFERENTES POLÍMEROS, COM DIFERENTES MATERIAIS DE CONSTRUÇÃO DO CALIBRADOR E DIFERENTES ARRANJOS PARA O SISTEMA DE VÁCUO DE CALIBRAÇÃO. O SISTEMA É CONSTITUÍDO POR UM CALIBRADOR MODULAR, INSTRUMENTADO COM TERMOPARES, QUE INTEGRA UM MÓDULO DE ENTRADA (1), UM MÓDULO DE SAÍDA (2) E DIVERSOS MÓDULOS INTERMÉDIOS (3), MONTADO NUMA ESTRUTURA METÁLICA DE SUPORTE (4) . NA MESMA ESTRUTURA EXISTE UM SUPORTE SUPERIOR DESLIZANTE QUE TEM ACOPLADA UMA CÂMARA TERMOGRÁFICA DE INFRAVERMELHOS (5) . O SISTEMA DE MEDIÇÃO COMPREENDE AINDA: UMA EXTRUSORA (6), UMA CABEÇA DE EXTRUSÃO DE FITA (7), UMA UNIDADE DE PUXO (8), UM TERMORREGULADOR (9), UMA BOMBA DE VÁCUO (10) E UM CAUDALÍMETRO (LI) . A APLICAÇÃO DA METODOLOGIA PROPOSTA REQUER, TAMBÉM, A UTILIZAÇÃO DE UM SISTEMA DE AQUISIÇÃO DE DADOS E DE MEIO PASSÍVEL DE LEITURA POR COMPUTADOR E AINDA UM PROGRAMA DE COMPUTADOR DE SIMULAÇÃO 3D DO ARREFECIMENTO DE PERFIS TERMOPLÁSTICOS DURANTE O ESTÁGIO DE CALIBRAÇÃO DO PROCESSO DE EXTRUSÃO.
Patent PT-106959-B (PT)
Title: Processos para a produção de glicolípidos microbianos do tipo manosileritritolípidos, a partir de materiais lenhocelulósicos e suas aplicações
Inventor: CÉSAR SIMÕES DA FONSECA
IPC: C12P19/44
Filed: 2013-05-17
Abstract: A PRESENTE INVENÇÃO REFERE-SE A PROCESSOS PARA A PRODUÇÃO DE GLICOLÍPIDOS MICROBIANOS, DO TIPO MANOSILERITRITOLÍPIDOS (MEL), A PARTIR DE FONTES DE CARBONO DE ORIGEM LENHOCELULÓSICA. ESTES PROCESSOS SÃO CARACTERIZADOS POR UTILIZAR MATERIAIS LENHOCELULÓSICOS E POR ESTAREM ENVOLVIDOS NA FERMENTAÇÃO PREFERENCIALMENTE FUNGOS DO GÉNERO PSEUDOZYMA OU OUTROS MICRORGANISMOS COMO FUNGOS OU BACTÉRIAS GENETICAMENTE MODIFICADOS E POR SE PRODUZIREM GLICOLÍPIDOS MICROBIANOS DO TIPO MEL. OS PROCESSOS DE PRODUÇÃO DE GLICOLÍPIDOS MICROBIANOS DO TIPO MEL INCLUEM TRÊS ETAPAS: PRÉ-TRATAMENTO DO MATERIAL LENHOCELULÓSICO; HIDRÓLISE ENZIMÁTICA; E FERMENTAÇÃO. A HIDRÓLISE ENZIMÁTICA E A FERMENTAÇÃO PODEM DECORRER DE FORMA SEQUENCIAL OU EM SIMULTÂNEO COM O AUXÍLIO DE ENZIMAS EXÓGENAS, OU EM SIMULTÂNEO COM ENZIMAS PRODUZIDAS PELO PRÓPRIO MICRORGANISMO. OS GLICOLÍPIDOS MICROBIANOS PRODUZIDOS TÊM APLICAÇÃO PARA PRODUTOS: BIOSURFACTANTES; ANTIMICROBIANOS; ANTICANCERÍGENOS; PARA REGENERAÇÃO EPITELIAL; PARA ESTABILIZAÇÃO E/OU PURIFICAÇÃO DE PROTEÍNAS OU VACINAS; PARA ADMINISTRAÇÃO DE FÁRMACOS E GENES; ANTICONGELANTES.
Patent TW-209266-B (TW)
Title: Method and apparatus for construction of exterior building walls
Inventor: LIN SHWU-JONG
IPC: E04B1/35
Filed: 1993-03-17
Granted: 1993-07-11
Abstract: The invention is to provide a method and an apparatus for construction of exterior building walls. Built around a building is a scaffolding in which a plurality of hoists is arranged which enables the entire scaffold to be raised so that workers standing in an ascending scaffold can work on outer walls of a building floor by floor and decorate the outer walls by making use of a descending scaffold. By means of such a scaffolding system, workers can safely and quickly perform a work on an exterior wall surface of a building.
Patent TW-216411-B (TW)
Title: Pattern duplication method
Inventor: SHYU SY-YAW
IPC: B44C1/22
Filed: 1993-07-27
Granted: 1993-11-21
Abstract: A pattern duplication method is disclosed, in which the patterns to be duplicated are printed on a metal plate using etch-resistant paint and then the metal plate is etched to cut the pattern into its surface. After the etching treatment, the paint covered portion remains by nature and the other portions will be further polished and lacquered to prevent oxidation and prolong its service life. The paint on the pattern can be kept as a primitive color after the duplication is completed.
Patent TW-248545-B (TW)
IPC: B60R22/10
Filed: 1993-09-09
Granted: 1995-06-01
Abstract: A child seat device (10), for use in a vehicle having a seatbelt (12) for securing the child seat device to the vehicle seat (14), has an inflatable child seat (20) which includes an inflatable bottom panel (22), an inflatable back panel (24) upstanding from the rear of the bottom panel, and a pair of opposed, laterally-spaced inflatable sidewall panels (26). Each of the sidewall panels (26) has a back portion (30) projecting forwardly from a respective side of the back panel and a bottom portion (32) projecting upwardly from a respective side of the bottom panel. An inflatable brace (50) disposed in each of the sidewall panels intermediate the back and bottom sidewall portions, limits pivotal movement of the back and bottom sidewall portions towards one another. Each of the braces (50) defines a single interior air chamber having, at most, limited gaseous communication with the bottom, back and sidewall panels. Alternatively, a substantially rigid frame (200) is secured to the back panel (24) for movement therewith as a unit, thereby to limit pivotal movement of the back and bottom panels (24,22) towards one another. The frame (200) defines a pair of apertures (212) configured and dimensioned to receive therethrough a seatbelt (12), thereby to secure the device (100) to the vehicle seat (14). A releasable harness (62') maintains the torso of a child (c) intermediate the sidewall panels (26). <IMAGE>
Patent TW-370532-B (TW)
Title: The use of cetrorelix and other nona and decapeptides in the preparation of a medicament for combating AIDS and for growth stimulation
Inventor: ENGEL JURGEN
IPC: A61K38/00
Filed: 1994-04-16
Granted: 1999-09-21
Abstract: The use of cetrorelix and other nona- and decapeptides in the preparation of a medicament for combating AIDS and for growth stimulation. Cetrorelix and other oligopeptides are suitable for the preparation of a medicament for combating AIDS and ARC and for the preparation of a medicament for immune stimulation.
Patent TW-279229-B (TW)
Title: Double density fuse bank for the laser break-link programming of an integrated-circuit
Inventor: KARL-HEINZ FROEHNER
IPC: G11C11/407
Filed: 1995-11-01
Granted: 1996-06-21
Abstract: A fuse bank for use in the laser break-link programming of an integrated circuit device. The fuse bank uses fuse elements withtwo ends that contain fusible regions proximate the first end and non-fusible regions proximate the second end. The fuse elements are aligned in alternately oriented parallel rows so that the first end of each fuse element is juxtaposed with the second end of any adjacent fuse element. By sequentially alternating the orientation of the fuse elements in the fuse bank, the fuse elements can be formed in a highly dense matter without bringing any two fusible regions too close to one another. Accordingly, a laser can be used to sever selected fusible regions without adversely effecting other fusible regions within the fuse bank. By alternating the orientations of sequential fuse elements, a fuse bank can be created that is twice as dense as single orientation fuse banks with only a 30% to 50% increase in size. The space savings on an integrated circuit enables more circuitry per unit space and promotes the further miniaturization of the integrated circuit device.
Patent TW-282430-B (TW)
Title: Method of direct transfer printing in the plastic injection molding
Inventor: CHEN YEONG-SHAN
IPC: B29C45/17
Filed: 1996-02-28
Granted: 1996-08-01
Abstract: A method of direct transfer printing in the plastic injection molding,mainly by fastening the mold heads of two injection molding machineswith a joint mold, the characteristics including: a guide pulley andbracket conveying a plastic film having the desired patterns orcharacters on its surface through the inner space of the joint moldinto the interface layer between the injected products; the patternsor characters embedded in the finished products during the injectionmolding process.
Patent TW-418197-B (TW)
Title: Arylsulfonyl hydroxamic acid derivatives together with a pharmaceutical composition comprising the same which are useful as inhibitors of matrix metalloproteinases or the production of tumor necrosis factor
Inventor: PISCOPIO ANTHONY D
IPC: C07D241/06
Filed: 1996-04-08
Granted: 2001-01-11
Abstract: A compound of the formula, wherein R3, R4, R5, R6, R7, R8 and Ar are as defined above, useful in the treatment of a condition seiected from the group consisting of arthritis, cancer, tisuue ulceration, restenosis, periodontal disease, epidermolysis bullosa, scleritis and other disease characterized by matrix metalloproteinase activity, as well as AIDS, sepsis, septic shock and other diseases involving the production of TNF.
Patent TW-366483-B (TW)
Title: Method and apparatus for transmitting a voice sample to a voice activated data processing system
Inventor: CLINE TROY LEE
IPC: G06F3/16
Filed: 1996-05-15
Granted: 1999-08-11
Abstract: An apparatus and method transmit analyzed voice samples from a wireless transmitting device worn by a user to a remote voice activated data processing system having a speech recognition system stored thereon. The method includes the first step of storing voice characteristics of a user into a memory (e.g. a RAM chip) on a wireless transmitting device. The second step includes voice activating the transmitting device and speech recognition system. After the transmitting device and speech recognition system have been activated, the third step includes transmitting the voice characteristics from the memory to the speech recognition system thereby enabling the user to verbally communicate directly with the voice activated data processing system.
Patent TW-371307-B (TW)
Title: Polyurethane elastomers exhibiting improved demold, green strength, and water absorption, and haze-free polyols suitable for their preparation
Inventor: ALLEN GARY L
IPC: C08G18/10
Filed: 1996-06-15
Granted: 1999-10-01
Abstract: Polyurethane elastomers exhibiting improved green strength while maintaining short demold times are prepared from ultra-low unsaturation polyoxypropylene polyols containing up to 20 weight percent internal random oxyethylene moieties. The elastomers absorb less than 10 weight percent water at 0 DEG C. The internal polyoxyethylene moiety-containing polyoxypropylene polyols may be used to prepare ultra-low unsaturation polyoxyethylene capped polyols which are haze-free and which may be used to prepare haze-free 4,4'-MDI prepolymers. Multidisperse blends of monodisperse internal oxyethylene moiety-containing polyoxypropylene polyols of ultra-low unsaturation provide yet further improvements in elastomer processing.
Patent TW-357376-B (TW)
Title: Highly water-soluble and photo-sensitive Improved photoresist for cathode ray tube and the preparation of the same
Inventor: TUNG HUA-SU
IPC: H01J1/64
Filed: 1996-07-05
Granted: 1999-05-01
Abstract: A kind of improved photoresist coating applied to the inner surface of the glass image display screen, comprising PVP, PVA and water, the improvement including: adding a photosensitizer of triazo compound with di(tetraalkylammonium +N(R)4) group to the photoresist coating; the trizao compound is selected from di (para-trizao benzylidene)cyclopentanone-2, 2^-disulfonate, di(tetraalkylammonium)2, 2^ (1,5-penta-3-ketone-1,4-divinyl)bis (5-triazo benzene-disulfonate), and di(tetraalkylammonium), 4,4-diazodiphenyvinyl-2,2^-disulfonate, wherein the di(tetraalkylammonium) renders the photosensitizer highly water soluble, thus increasing the concentration of the sensitizer in the photoresist coating to improve the hue contract of vidoe images.