baber/WOPTO huggingface dataset:
Patent CN-113629678-B (CN)
Title: 一种直流控制器的保护装置、方法和直流控制器
IPC: H02H9/02
Filed: 2021-07-30
Granted: 2022-05-27
Abstract: 本发明公开了一种直流控制器的保护装置、方法和直流控制器，该装置包括：输入电流限流单元和防反接保护单元；在所述直流控制器的直流供电电源供电的情况下，所述输入电流限流单元和所述防反接保护单元均处于开启的状态；其中，所述输入电流限流单元，设置在所述直流控制器的直流供电电源的输出侧，被配置为对所述直流控制器的直流供电电源的输入电流进行过流保护；所述防反接保护单元，设置在所述输入电流限流单元的输出侧，被配置为对所述直流控制器进行防反接保护。该方案，通过在直流控制器的防反接MOS管保护电路中，对输入电流进行限流处理，避免防反接MOS管保护电路比短路保护电路先损坏。
Patent CN-113400008-B (CN)
Title: 一种高速气嘴热熔组装检测线
IPC: G01B11/00
Filed: 2021-08-19
Granted: 2022-04-05
Abstract: 本发明涉及热熔技术领域，特别是一种高速气嘴热熔组装检测线，包括组装部、热熔部、检测部、螺纹盖仓、波纹管仓、鸭嘴阀仓和控制器，所述组装部通过热熔部与检测部连接；所述组装部包括第一搬运机构和第二搬运机构，所述第一搬运机构与第二搬运机构配合设置，所述螺纹盖仓与组装部连接，所述波纹管仓与组装部连接，所述热熔部包括搬送机构和热熔机构，所述搬送机构与热熔机构配合设置，所述检测部包括移动机构和检测机构，所述移动机构与检测机构配合设置。本发明通过控制器控制组装部、搬送机构、热熔机构、移动机构和检测机构，可以高效地完成产品的组织、热熔与检测，使用便捷高效。
Patent CN-113772990-B (CN)
IPC: C04B24/26
Filed: 2021-09-25
Granted: 2022-06-07
Abstract: 本申请涉及混凝土外加剂领域，具体公开了一种高强混凝土专用外加剂及其制备方法。高强混凝土专用外加剂，包括以下重量份的组分：1.8‑3.4份煤矸石沸腾炉渣、2.6‑4.2份沸石粉、3‑7份无碱速凝剂、1‑3份减水剂、5‑10份矿粉、2.5‑5份玻璃纤维；其制备方法为：将煤矸石沸腾炉渣、沸石粉和矿粉混合均匀，形成预混物；将减水剂、玻璃纤维和无碱速凝剂混合均匀，加入预混物，混合均匀，制成高强混凝土专用外加剂。本申请的高强混凝土专用外加剂具有用于喷射混凝土中，能降低混凝土喷射时的回弹率和粉尘浓度，并提高混凝土的后期强度，改善抗碳化能力和耐久性的优点。
Patent CN-113917882-B (CN)
IPC: G05B19/042
Filed: 2021-12-14
Granted: 2022-04-01
Abstract: 本发明公开了一种湖库治理机器人自动迁移系统，其涉及湖泊水库、景观水体水质污染控制领域，旨在解决传统的湖泊水库水治理成本较高的问题，其技术方案要点包括若干设置在湖泊内的水质监测仪，水质监测仪上电性连接有第一无线发送模块，中央处理模块包括信息储存模块和信息转换模块，中央处理模块上电性连接接收第一无线发送模块的信息的第一无线接收模块，中央处理模块上电性连接第二无线发送模块，驱动模块上电性连接接收第二无线发送模块的第二无线接收模块，第二无线接收模块电性连接在驱动模块，本体上固定设置有无线位置信号发送模块，第一无线接收模块和无线信发送模块呈电信号连接，本发明达到了降低湖泊水质治理成本的效果。
Patent CN-114039455-B (CN)
IPC: H02K9/26
Filed: 2022-01-10
Granted: 2022-04-08
Abstract: 本发明公开了一种电机冷却散热装置，属于电机技术领域，包括壳体、主体、透气网和扇叶，还包括：抽气管、喷气管、动力组件、气体连接组件、抽气组件、喷冷气组件、驱动组件；通过动力组件带动扇叶转动，从而可对所述主体进行散热，同时所述动力组件可带动所述抽气管和喷气管围绕主体进行公转和自转，从而可对所述主体的周侧实现全面散热，同时动力组件通过驱动组件带动所述抽气组件和喷冷气组件进行运转，所述抽气组件和喷冷气组件通过气体连接组件分别控制所述抽气管和喷气管进行抽热气和喷冷气，从而通过所述抽气管和喷气管的配合使用，可对所述主体进行快速散热；解决了现有电机散热效率较低的问题。
Patent GE-P20043254-B (GE)
Title: Use of Camptothecin Derivatives with Reduced Gastrointestinal Toxicity
Inventor: GUFFROY MAGALI
IPC: A61K47/26
Filed: 1999-08-03
Abstract: 1. Technical Result Improvement of medicinal properties.          2. Essence The use of camptothecin for preparing medicines for treating cancers of the gastrointestinal tract. Sodium chloride solution is administered while or before said medicine is administered as a peroral agent for reducing and prevention of side effects .         3. Field of Application Medicine.
Patent GE-P20084413-B (GE)
Title: Nozzle for sprinkling facing mixture
Inventor: TATUNASHVILI GEORGE
IPC: E04F21/06
Filed: 2006-10-27
Abstract: A nozzle contains a cylindrical case with a conical section, an annular chamber, a pipe junction executed on the case for feeding facing mixture into the chamber under pressure, a means for feeding air under pressure and a mouth-piece. The means is executed in the form of the pipe passed through the greatest face wall of the case and fractionally interposed in the chamber, one end of which is provided for connection to the mains for feeding pressure, besides the mouth-piece is fixed with an opportunity of removal in a hole made in the least face wall, and means for feeding air under pressure has an opportunity of a reciprocative transportation for regulation of magnitude of a clearance between the nozzle and the tip.
Patent GE-P20074056-B (GE)
Title: Azithromycin dosage forms with reduced side effects
Inventor: HAGEN TIMOTHY ARTHUR
IPC: A61K9/16
Filed: 2004-05-14
Abstract: An oral dosage form comprises alkalizing agent and an azithromycin multiparticulate compri¬sing azithromycin and glyceryl monobehenate, glyceryl dibehenate, glyceryl tribehenate and a po¬loxamer.
Patent CA-1291585-C (CA)
Title: Organic polymer stabilisation
Inventor: GRECO ALBERTO
IPC: C08K5/54
Filed: 1985-05-17
Granted: 1991-10-29
Abstract: ABSTRACT OF THE DISCLOSURE:           Reactive antioxidant compounds, able to stabilise organic polymers, contain in their molecule a sterically hindered phenolic group and a hydrolysable silyl function. In stabilising organic polymers, these reactive antioxidant compounds can be hydrolysed at the silyl function with the formation of silanol groups, which are made to interact in order to form complex resinous stabilising structures. These latter are added in stabilising quantities to the polymer to be stabilised.   The hydrolysis at the silyl function and the formation of the resinous structure may take  place  spontaneously  within  the polymer  to be stabilised.  The reactive antioxidant compound may be added to the polymer after being stably supported on a solid support by reaction with an inorganic solid having surface hydroxyl groups.  The reactive antioxidant compound can be made to interact with the polymer so that the stabilising compound becomes chemically bonded to the polymer chains. In all cases,  stabilised polymers are obtained containing the antioxidant compound in a form which is not removable from the polymer.  The processes for preparing the reactive antioxidant compounds and for preparing the stabilised polymer compositions are also described.
Patent CA-1288059-C (CA)
Title: Method and system for cleansing a filter bed
Inventor: WALKER KENNETH A
IPC: B01D24/46
Filed: 1986-06-02
Granted: 1991-08-27
Abstract: METHOD AND SYSTEM OF CLEANSING A FILTER BED ABSTRACT     An improved method of cleansing a filter bed is herein provided utilizing a backwash pump (12) having an inlet line (14) and an outlet line (16).  The improved method and system includes two cycle operations.          Initially, the filter bed is backwashed to remove contaminants from the filter bed with the backwash pump (12) drawing liquid from an effluent channel (26).  A portion of the liquid passing on backwash pump outlet line (26) is passed through a bypass adjustment valve (34) for egress on an outlet line (38) for recirculation to the effluent channel (26).          The second stage of the cleansing operation is through a purging cycle where the filter bed is purged subsequent to the backwashing operation for removal of further contaminants from the filter bed.  In the purging cycle, a closed loop system is formed between the bachwash pump (12) and the backwash shoe (28) with a portion of liquid being diverted through a purge adjustment valve member (44) for egress on an outlet line (46) external to the system or to a separate filter member.
Patent CA-1294090-C (CA)
Title: Male impotence prosthesis
Inventor: GEROW FRANK J
IPC: A61F5/41
Filed: 1986-06-06
Granted: 1992-01-14
Abstract: Abstract of the Disclosure Is an external device for receiving and positioning the male penis in a simulation of an erection to overcome impotence which  includes  a  flexible  hollow  cylindrical body enclosed at one end and having the other end open for receiving the penis.  After the penis is inserted into the cylindrical body,  means  are provided  for  introducing a negative pressure in the interior of the body and drawing the penis into the body to its anatomic limit to achieve an erection, the improvement comprising a sealing member integrally extending from the open end of the cylindrical body  and  comprising  a  thin-walled  flexible  sleeve-like sealing  portion  having  a  predetermined  substantially constant  inner  circumferential  measurement  which is  a function of the circumference of the stretched non-erect penile  shaft,  the  predetermined  inner  circumferential measurement  being  less  than  the  inner  circumferential measurement of the cylindrical body for functioning as a seal  about  the  penile  shaft  to  maintain  the  negative pressure introduced therein, but not engaging the penile shaft  tightly  enough  to  restrict  venous  blood  flow therein,  and  a  flexible  transition  portion  integrally interconnecting one end of the sleeve-like sealing portion and the open end of the body for positioning the sleeve-like sealing portion in concentric axial alignment with the cylindrical body.
Patent CA-1275450-C (CA)
Title: Infrared laser catheter system
Inventor: SINOFSKY EDWARD L
IPC: G02B6/24
Filed: 1986-07-30
Granted: 1990-10-23
Abstract: A B S T R A C T     A system is provided for the surgical removal of biological material.  The system includes a laser energy source operating with an output wavelength in the range of 1.4-2.2 micrometers, an optical fiber with an optical device for directing the output of the laser source to the proximal end of said optical fiber.  A further device is attached to the distal end of the optical fiber for directing laser energy propagating down said fiber to a surgical site.
Patent CA-1288614-C (CA)
Title: Method and apparatus for measuring the bubble point of oil in an underground formation
Inventor: GLOTIN BERNARD J P
IPC: G01N7/00
Filed: 1986-09-23
Granted: 1991-09-10
Abstract: ABSTRACT OF THE DISCLOSURE         The invention relates to measuring the bubble point of oil down a well drilled into an underground formation.  The pressure is measured by means of apparatus lowered down the well.          The apparatus comprises a chamber (2) in which a small quantity of oil is confined in a volume which is variable by means of a needle (3) having portions of different diameters (3a, 3b) capable of being inserted to a greater or lesser extent into the chamber (2) under drive from a motor (7).  Values of pressure inside the chamber and of chamber volume are respectively measured by a manometer (11) and by a displacement sensor (12) connected to the needle (3) and are transmitted to the surface.
Patent CA-1288580-C (CA)
Title: Procede et installation de traitement a l'ammoniac
Inventor: BRUGEROLLE JEAN-RENAUD
IPC: B01D53/14
Filed: 1986-10-24
Granted: 1991-09-10
Abstract: Suivant ce procédé, on élimine l'ammoniac d'un effluent gazeux du traitement par lavage au moyen d'un liquide constitué essentiellement par de l'eau, on régénère le liquide de lavage par distillation à contre-courant du gaz à traiter, puis on recycle au moins l'essentiel du liquide de lavage régénéré en le mettant en relation d'échange thermique avec le liquide de lavage à régénérer. Application à la production de CO2 par traitement de fumées à l'ammoniac. L'installation pour la mise en oeuvre de ce procédé comprend une tour de lavage alimenté à sa base par l'effluent gazeux d'un appareil de traitement à l'ammoniac et à son sommet par un liquide constitué essentiellement par de l'eau, un appareil de distillation dont le sommet est relié par une première conduite à la base de la tour de lavage et qui est alimenté à sa base par le gaz à traiter. L'installation comprend aussi une conduite de recyclage qui relie la base de l'appareil de distillation au sommet de la tour de lavage.
Patent CA-1280214-C (CA)
Title: System for accounting for postage expended by a postage meter having data security during printing
Inventor: MALLOZZI JOSEPH D
IPC: G07B17/02
Filed: 1986-12-24
Granted: 1991-02-12
Abstract: ABSTRACT OF THE DISCLOSURE      A system for accounting for postage expended by a postage meter.  The system includes a keyboard and display for entry of commands and postal information, a printer, a memory for storing account records and program data, the memory further including a non-volatile memory for storing account records and other data, an interface to an electronic postage meter, and a processor including a CPU.  The processor controls an electronic postage meter through the interface in accordance with the program data and entered postal information to set the meter and then responds to signals from the meter to update account records.  The processor may also edit selected account records in accordance with entered information.  In one disclosed embodiment the system responds to an operator request to print the account data base by repetitively scanning the account data base and sequentially printing accounts. In another disclosed embodiment the system stores images of accounts to be edited in selected regions of non-volatile memory before beginning to edit the account.  These embodiments increase the security of the data in the accounts by avoiding exposure to data loss due to power failures or transients while accounts are being processed.  In another disclosed embodiment a record of edited accounts is maintained by the system to allow a service technician to detect unauthorized editing of accounts.  In still another disclosed embodiment the system tracks the contents of the postage meter ascending register to detect off-line meter usage.
Patent CA-1294155-C (CA)
Inventor: STRANGMAN THOMAS E
IPC: B32B15/01
Filed: 1987-02-24
Granted: 1992-01-14
Abstract: OXIDATION RESISTANT PROTECTIVE COATING SYSTEM FOR GAS TURBINE COMPONENTS, AND   PROCESS FOR PREPARATION OF COATED                 ABSTRACT OF THE DISCLOSURE           A coating for protecting the surfaces of gas turbine components such as single crystal turbine blades and vanes, wherein the coating has a composi-tion  (in weight percent)  consisting  essentially of chromium,  15-35;  aluminum, 8-20;  tantalum,  0-10; tantalum plus niobium,  0-10;  silicon,  0.1-1.5; haf-nium, 0.1-1.5; yttrium, 0-1; cobalt, 0-10; and nickel, balance totalling 100 percent.   A preferred coating; which is particularly desirable for use with single-crystal turbine blades and vanes, has a composition consisting essentially of chromium, 17-23; aluminum, 10-13; tantalum plus niobium, 3-8; silicon, 0.1-1.5; hafnium, 0.1-1.5; yttrium, 0-0.8; cobalt, O-trace; and nickel, balance totalling 100 percent.  A process for preparing the coated component is also described.
Patent CA-1281778-C (CA)
Title: Fm receiver with improved response to rayleigh faded companded signals
Inventor: EASTMOND BRUCE C
IPC: H04B7/00
Filed: 1987-03-31
Granted: 1991-03-19
Abstract: Abstract The present invention minimizes noise pops in the audio output of a receiver due to Rayleigh fading of the received signal by using a controllable attenuator in series with the audio output.  A signal which determines the amount of attenuation is generated in response to the strength of the received signal so that the audio output is attenuated during Rayleigh fades when the received signal decreases below a predetermined threshold.  The threshold is preferably s-t relative to the average strength Or the received signal.  The increased attenuation results in lower audio output and thus mutes the magnitude of the pop generated during the fade.  The invention also improves the audio output in a system using companding.
Patent CA-1317916-C (CA)
Title: Centrifugal fan with sliding inlet control system
Inventor: PASSADORE ALBERT M
IPC: F04D29/56
Filed: 1987-03-31
Granted: 1993-05-18
Abstract: IMPROVED CENTRIFUGAL FAN                           ABSTRACT A centrifugal fan in which the cone and wheel have a telescoping relationship to vary the rated capacity of the fan.  The mechanism effects the relative movement manually, or by a servo arrangement responsive to system pressure.  The telescoping relationship includes an anti-recirculation sleeve on the cone.  The wheel and cone can be moved to effect engagement of the cone and the wheel back plate to cut off the fan, when in a parallel arrangement, and to arrest wheel movement, after the drive to the wheel has been stopped.  In another aspect, the cone and wheel are bodily stationary and a separate movable flow control sleeve is positioned to control flow.
Patent CA-1306234-C (CA)
Inventor: COURTY PHILIPPE
IPC: C07C27/00
Filed: 1987-03-17
Granted: 1992-08-11
Abstract: Procédé de fabrication d'un mélange d'alcools primaires saturés par réaction d'oxydes de carbone avec l'hydrogène en présence d'un catalyseur formé essentiellement des éléments suivants : le cuivre, le cobalt, le zinc, au moins un métal A choisi dans le groupe formé par les métaux alcalins et alcalino-terreux et éventuellement le zirconium et/ou au moins un métal M choisi dans le groupe formé par le scandium, l'yttrium et les métaux des terres rares, et/ou au moins un métal N choisi dans le groupe formé par les métaux nobles du groupe VIII, la proportion pondérale de chaque élément métallique étant de: cuivre 15-55%, cobalt 5-25%, zinc 15-70 %, métal A 0,01-5 %, zirconium 0-55%, métal M 0-20%, métal N 0-1%, la somme des pourcentages en poids de zinc et du zirconium par rapport au poids total des métaux étant de 15 à 70% et les rapports atomiques entre ces métaux étant de Cu/Co 0,2: 1 à 5 : 1, Zn/(Zn + Zr) 0,05 : 1 à 1 : 1 et (Zn + Zr)/Co 0,5 : 1 à 8 : 1. Le catalyseur peut être préparé par complexation ou par coprécipitation des éléments catalytiques.
Patent CA-1290072-C (CA)
Title: Human lifelike dolls, mannequins and humanoids and pet animals and methods of individualizing and personalizing same
Inventor: KATZ MARCELLA M
IPC: A63H3/02
Filed: 1987-04-03
Granted: 1991-10-01
Abstract: ABSTRACT OF THE INVENTION         Flexible sheet fabric material for use in the fabrication of  items bearing  lifelike head and/or body representations of real life subjects.  The sheet mater-ial has a print surface on at least one of its sides and a computer-generated imprint thereon of a two-dimensional photographic  representation,  an  azimuthal-type  sector projection, or a computer warped or panoramic representa-tion of a human or animal head and/or body, the sheet material being capable of application to a substrate structure or stuffing substance  to form a  lifelike reproduction of a real life subject.  In accordance with the methodology disclosed,  two-dimensional or three-dimensional visual image information relating to a real life  subject  is digitized with  the digitized  image information thereafter fed to a computer for manipulation and editing by software, data bank anatomic information and keyboard direction for CRT display and for utiliza-tion by a computer-directed printer.  The flexible sheet material is fed to the printer and receives an imprint of the visual image information in the form of a two-dimen-sional photographic representation of  the real life subject,  an azimuthal-type sector projection of  the subject, or a computer warped or panoramic representation of the subject.   The sheet material bearing the visual information  is  thereafter conformed and applied  to an appropriate  substrate  structure  or  stuffing  substance to form the lifelike representation of the real life subject.
Patent CA-1287386-C (CA)
Title: Segmented construction for electrical connector assembly
Inventor: BIRCH NORMAN R
IPC: H01R13/646
Filed: 1987-04-09
Granted: 1991-08-06
Abstract: ABSTRACT     An electrical connector assembly comprises a conductive electrical conductor having electrical contacts on tap portions, a composite insulative support for the conductor encircling the tap portions and being encircled by a hollow conductive shell, the shell having individual sleeve portions and a composite sleeve portion constructed of composite segments, a collar compressibly encircling the composite segments and urging them into abutment with one another without gaps therebetween, the individual sleeve portions being integral with corresponding composite segments, and corresponding individual sleeve portions urged by the collar into abutment with one another without gaps therebetween.
Patent CA-1341280-C (CA)
Inventor: ESTELL DAVID AARON
IPC: C12N5/10
Filed: 1987-04-30
Granted: 2001-08-07
Abstract: Novel carbonyl hydrolase mutants derived from the amino acid sequence of naturally-occurring or recombinant non-human carbonyl hydrolases and DNA sequences encoding the same. The mutant carbonyl hydrolases, in general, are obtained by in vitro modification of a precursor DNA sequence encoding the naturally-occurring or recombinant carbonyl hydrolase to encode the substitution, insertion or deletion of one or more amino acids in the amino acid sequence of a precursor carbonyl hydrolase. Such mutants have one or more properties which are different than the same property of the precursor hydrolase.
Patent CA-1303030-C (CA)
Title: Glycosyl derivatives and use thereof
Inventor: MINAMI ISAO
IPC: C07K16/00
Filed: 1987-07-02
Granted: 1992-06-09
Abstract: Abstract of the Disclosure The invention provides a compound of the formula (I): RO-(CH2CH2O)m(CH2)n-Z wherein R is a glycosyl group, m is an optional positive integer, n is an integer of 1 to 3 and Z is -CHO, -CH2OH or -COOH.      The compound of the formula (I'): RO(CH2CH2O)m(CH2)n-CHO wherein R, m and n are as defined above and the formula (I"'): RO(CH2CH2O)m(CH2)n-COOH wherein R, m and n are as defined above is useful as a chemically modifying agent for protein.     The compound of the formula (I"): RO(CH2CH2O)m(CH2)n-CH2OH wherein R, m and n are as defined above is useful as a protein fractionating agent.
Patent CA-1298271-C (CA)
Title: Bimetallic catalyst
Inventor: BOXHOORN GOSSE
IPC: B01J37/08
Filed: 1987-08-11
Granted: 1992-03-31
Abstract: ABSTRACT                    BIMETALLIC CATALYST       Process of preparing a bimetallic catalyst comprising a)   applying a titanium compound to an inorganic carrier; b)   applying, simultaneously with or after applying the titanium compound, to the inorganic carrier at least one additive which is selected from the group con-sisting of a bromine compound, a fluorine compound and an iodine compound; c)   applying, simultaneously with or after applying the additive, to the inorganic carrier a vanadium compound; d)   drying the carrier; and e)   subjecting the carrier to a heat treatment at a temperature between 200 °C and 800 °C.
Patent CA-1288809-C (CA)
Title: Electrically conductive material and a process for the preparation of sameand secondary battery using the electrically conductive material
Inventor: SUZUKI TETSUMI
IPC: H01M10/05
Filed: 1987-09-11
Granted: 1991-09-10
Abstract: ABSTRACT OF THE DISCLOSURE     New   electrically   conductive    material    suitable particularly for a  secondary  battery  and  a  process  for preparing the electrically conductive material are provided.   The  process  for  the   preparation of   the   electrically conductive  material  comprises  the  steps  of  reacting  a compound having conjugated double bonds  with  an  oxidizing agent wherein the oxidizing agent comprises a cupric compound and  a  nitrile  compound.   The  electrically   conductive material comprises grainy polypyrrole obtained by reacting a pyrrole compound with an oxidizing agent which is constituted by primary particles having an average particle size of 0.01 to 0.4 µm and has a press molding density of 1 to 1.6 g/cm3.
Patent CA-1339343-C (CA)
Inventor: NAFISI-MOVAGHAR KARIM
IPC: A23L27/28
Filed: 1987-12-30
Granted: 1997-08-26
Abstract: Tomato seeds are isolated, dried, and roasted at a temperature and for a time period sufficient to change the flavor characteristics of said seeds.  Flavorants are then prepared by grinding said seeds or components thereof or by extracting flavored oils from said seeds or components.  Food products are fortified by incorporating the tomato seed-derived flavorants therein.
Patent CA-1304209-C (CA)
Inventor: FUNAKI AKIRA
IPC: B29C48/37
Filed: 1988-02-12
Granted: 1992-06-30
Abstract: ABSTRACT OF THE DISCLOSURE        This invention relates to a process of producing sheet and the like from thermoplastic resin and a screw used therefor. The resin extruder includes a cylinder and the screw.   The resin is passed through a feeding section,  a compressing section, a metering section, a mixing section, a shearing section and a stress  relaxing  section,  which are  successively positioned from a resin feeding side to a resin extruding side, and a molten film-shaped resin is extruded, and this film-shaped resin is passed in the flowing direction of cooling water to be cooled.
Patent CA-1302917-C (CA)
Title: Tear open lid
Inventor: MACK ANTHONY C
IPC: B65D17/34
Filed: 1988-02-19
Granted: 1992-06-09
Abstract: ABSTRACT      A disposable plastic lid including a depending skirt formed with stacking, sealing and snap rings, and a pull tab at the lowermost edge of the skirt. The lid is formed such that the plastic is uniaxially oriented in a first direction and the tab is located to initiate a tear in a second direction transverse to the first direction.  Tearing is also facilitated by notching the pull tab at either end thereof, and by providing a surface projection interrupting the snap ring in an area immediately adjacent the pull tab.