摘要:
There is provided an optical reader system that can include an optical reader and a host processor which may be in communication via a communication link. In one embodiment a communication link between an optical reader and a host processor can be a wireless communication link. The optical reader in one embodiment can receive from the host processor a trigger instruction. In another embodiment the optical reader can receive from the host processor a single frame instruction. The optical reader in another embodiment can receive from the host processor an image upload instruction.
摘要:
A reading apparatus is provided for reading indicia. In one embodiment a reading apparatus can include a menuing program and an input/output device. A data source external to the apparatus having a menuing program and an input/output device can transmit reprogram requests and program data through the input/output device. In another embodiment a reading apparatus can have a trigger and first and second operating modes that can be selected by a user. The apparatus having the first and second operating modes can be configured so that a number of image representations that the apparatus stores within a certain time period after a trigger is actuated can be changed from a fixed to variable number when the apparatus is switched from the first to the second operating mode.
摘要:
The RUSH-DCS system provides a high performance, near real time data collection interface that can decipher, log, and route information for transaction processing. The interface supports dynamically loadable components for defining input data formats and transport mechanisms and protocols, which may be augmented and modified while running to minimize downtime. It supports multiple input types simultaneously, and is independent of the actual downstream services provided, allowing support for multiple, and scalable downstream services as needed by diverse applications. In addition, RUSH-DCS provides priority messaging, both uni- and bi-directional communication between clients and services, and the ability to route transactions to specific services.
摘要:
A containment bag for installation over a fluid control valve is provided. The valve containment bag is configured to contain leaks emanating from fluid control valves connected in line between an associated first inlet pipe and a second outlet pipe. The inlet pipe and the valve form a first junction and the outlet pipe form a second junction which are to be housed, along with the valve itself, within said bag so that fluid leaking from the junctions leaks into the containment bag. The containment bag is formed of an impermeable fabric which encloses an internal volume sufficient to accommodate the control valve and the associated junctions. The impermeable fabric defines first and second openings between the internal volume and the external environment, the first opening has a diameter substantially equal to the outer diameter of the inlet pipe, and the second opening has a diameter substantially equal to an outer diameter of the outlet pipe. A re-sealable seam extends between the said first and seconds openings so that the bag may be opened and installed over a previously installed control valve. The re-sealable seam may then be re-sealed to close the containment bag, with said first pipe protruding from said first opening and said second pipe protruding from said opening.
摘要:
An improved splice is provided which is useful in joining segments of a substantially flat band (e.g., a flat tow) of an acrylic fibrous material in an end to end relationship. A fabric surrounds and is sewn to an end of each band segment and extends beyond the end of the band to form a fabric extension. A pair of fabric extensions are sewn in an overlapping opposing relationship in the absence of any substantial overlap of the acrylic fibrous material of each band segment within the splice. The resulting splice is substantially flat in configuration and the band may be continuously passed in the direction of its length through the thermal stabilization zone without impairment of movement resulting from the presence of the splice. The usual exothermic heat of reaction which is evolved during the cyclization portion of the thermal stabilization reaction effectively is dissipated from within the splice without harm.
摘要:
An improved splice is provided which is useful in joining segments of a substantially flat band (e.g., a flat tow) of an acrylic fibrous material in an end to end relationship. A fabric surrounds and is sewn to an end of each band segment and extends beyond the end of the band to form a fabric extension. A pair of fabric extensions are sewn in an overlapping opposing relationship in the absence of any substantial overlap of the acrylic fibrous material of each band segment within the splice. The resulting splice is substantially flat in configuration and the band may be continuously passed in the direction of its length through the thermal stabilization zone without impairment of movement resulting from the presence of the splice. The usual exothermic heat of reaction which is evolved during the cyclization portion of the thermal stabilization reaction effectively is dissipated from within the splice without harm. BACKGROUND OF THE INVENTION It is well known that acrylic fibrous materials when subjected to heat undergo a thermal stabilization reaction wherein the fibrous material is transformed to a black form which is non-burning when subjected to an ordinary match flame.Such modification generally has been accomplished by heating the acrylic fibrous material in an oxygen-containing atmosphere. It is believed that the resulting thermal stabilization reaction involves (1) an oxidative cross-linking reaction of adjoining molecules as well as (2) a cyclization reaction of pendant nitrile grounds to a condensed dihydropyridine structure. The cyclization reaction is exothermic in nature and must be controlled if the fibrous configuration of the acrylic polymer undergoing stabilization is to be preserved. The resulting thermally stabilized fibrous material is useful as a precursor in the formation of carbon fibers.On a commercial scale the thermal stabilization reaction commonly is carried out on a continuous basis with a continuous length of a multifilament acrylic fibrous material being passed in the direction of its length through a thermal stabilization zone which is provided with a heated gaseous atmosphere. The movement of the continuous length of acrylic fibrous material through the stabilization zone may be directed by rollers, etc. situated therein.When the continuous length of acrylic fibrous material is in the form of a flat band (e.g., a flat tow), a need has arisen for an improved flat splice which can be used to effectively join segments of the precursor so that the continuous operation of the thermal stabilization reaction will not have to shut down after the passage of each length of fibrous precursor through the furnace. For instance, acrylic tows are commercially available in the form of a bale having a finite filament length. Considerable down time commonly is involved to cool down the thermal stabilization zone, to string up another length of fibrous precursor, and to again bring the thermal stabilization zone to operating temperature. Such restringing also wastes a portion of the precursor fiber. Accordingly, those skilled in the art have been aware of the need for an effective splice technique whereby the thermal stabilization treatment may be conducted for an extended period of trouble free operation.It has been found that the exothermic heat of reaction commonly creates difficulties in connection with prior splice attempts since the resulting heat is not effectively dissipated and may cause breakage of the fibrous band. Also, bulky splices (e.g., knots) commonly cannot be accommodated within thermal stabilization zones without interference and loss of process stability. If the band segments are laterally spread prior to conventional splicing in an overlapping fashion in an attempt to deal with the usual exothermic heat of reaction, then the substantially wider section of the band at the splice area complicates processing as the band travels on a continuous basis.It is an object of the present invention to provide an improved process for the thermal stabilization of a substantially flat multifilament band of an acrylic fibrous material wherein the ends of at least two discrete band segments are joined and continuously are passed in a successive manner in the direction of their length through a heated thermal stabilization zone while maintaining the original fibrous configuration of the same substantially intact for a residence time sufficient to render the band black in appearance, and non-burning when subjected to an ordinary match flame.It is an object of the present invention to provide a substantially falt multifilament band of an acrylic fibrous material which is capable of undergoing thermal stabilization by continuous passage through a thermal stabilization zone in the direction of its length having at least two discrete band segments which are joined in an end to end relationship by an improved splice.It is an object of the present invention to provide a splice for joining in an end to end relationship at least two discrete band segments of an acrylic fibrous material wherein the exothermic heat of reaction resulting from a thermal stabilization reaction readily is dissipated.It is a further object of the present invention to provide a splice for joining in an end to end relationship at least two discrete band segments of an acrylic fibrous material which is relatively flat in configuration and readily may be passed through a thermal stabilization zone without impairment of movement resulting from the presence of the splice.These and other objects as well as the scope, nature, and utilization of the invention will be apparent from the following description and appended claims.SUMMARY OF THE INVENTIONIt has been found that in a process for the thermal stabilization of a substantially flat multifilament band of an acrylic fibrous material wherein the ends of at least two discrete band segments are joined and continuously are passed in a successive manner in the direction of their length through a heated thermal stabilization zone while maintaining the original fibrous configuration of the same substantially intact for a residence time sufficient to render the band black in appearance, and non-burning when subjected to an ordinary match flame; improved results are accomplished when the ends of at least two of said band segments are joined by (1) surrounding an end of each band segment with a fabric which is capable of withstanding the heated thermal stabilization zone with a portion of the fabric extending beyond each enclosed end of the band segment to form a substantially flat fabric extension, (2) sewing the fabric to each band segment in the area where the band is enclosed by the fabric with a thread which is capable of withstanding the heated thermal stabilization zone while maintaining the enclosed portion of the band in a substantially flat configuration, (3) overlapping a pair of the substantially flat fabric extensions with each of the band segments extending in an opposite direction, and (4) sewing together the overlapped substantially flat fabric extensions with a thread which is capable of withstanding the heated thermal stabilization zone to join the band segments of acrylic fibrous material in the absence of any substantial overlap of the acrylic fibrous material of each band segment.The present invention provides a substantially flat multifilament band of an acrylic fibrous material which is capable of undergoing thermal stabilization by continuous passage through a thermal stabilization zone in the direction of its length having at least two discrete band segments which are joined in an end to end relationship by a splice comprising:1. fabric capable of withstanding the thermal stabilization treatment which surrounds an end of each band segment and extends beyond the end of the band segment to form a substantially flat fabric extension,2. stitches capable of withstanding the thermal stabilization treatment which join the fabric to the end of each band segment, and3. stitches capable of withstanding the thermal stabilization treatment which unite a pair of the substantially flat fabric extensions while in an overlapping opposing relationship in the absence of any substantial overlap of the acrylic fibrous material of each band segment within the splice.
摘要:
An optical reader is provided that can be reprogrammed. In one method a plurality of commands are encoded into a plurality of optical symbols, at least one of the optical symbols is displayed on a display, and the at least one displayed optical symbol is read to reprogram an optical reader. In another method an optical reader is coupled to a computer having a plurality of computer programs. The computer can receive an identifier from the optical reader to determine reader compatibility, and select a compatible optical reader program. In another method, a plurality of parameters are encoded into at least one bar code symbol. The at least one bar code symbol can be output in such form that an optical reader can read the at least one bar code symbol, and the at least one barr code symbol can be read to download the plurality of parameters to an optical reader.
摘要:
An optical reading system comprising an optical reader and a host processor. In one aspect of the invention, the host processor may be configured to transmit a component control instruction in response to a command input by a user of the host processor to remotely control the reader. The optical reader subsequently receives the transmitted component control instruction and executes the component control instruction substantially on receipt thereof. In one embodiment, execution of the component control instruction by the optical reader has the same effect as the reader trigger being manually pulled by a reader operator.
摘要:
The invention relates to an optical reading system comprising an optical reader and a host processor which is adapted for reprogramming the reader and for other interactions with the reader. In one aspect of the invention the host processor may be configured to read a parameter table stored in a memory space of the reader, execute commands to edit the parameter table and write the edited parameter table back to the reader memory space, or to another location such as to a bulk storage device for use in reprogramming additional readers. In another aspect of the invention, the host processor may be in communication with a host memory space that stores a plurality of candidate parameter tables, and may be configured to read and edit the candidate parameter tables from the host memory space.
摘要:
An electronic mail file access system (100) and associated methods permit a person (102) who originates or maintains a file to allow a person (198) authorized to view or edit a file to access the file by transmitting an electronic message to the file accessor. The file manager can conveniently select whether the file accessor will be able to modify the file or just view it. A file manager can grant one or more accessors viewing or editing access to a file (or multiple files) through transmission of a common electronic message, or through transmission of a separate message for each file or accessor. Variations and methods with different advantageous features are also described.