摘要:
Copolymide foams derived from a diester of 3,3',4,4'-benzophenonetetracarboxylic acid, an aromatic diamine, and a heterocyclic diamine. A molar concentration of the heterocyclic diamine approaching but not exceeding 0.42 is employed. This results in a flexible foam with a homogeneous cellular structure and a reduced compression set loss.
摘要:
Terpolyimides prepared from tetracarboxylic acid esters and combinations of heterocyclic, aromatic, and aliphatic diamines and artifacts composed of those terpolymers. Precursors, and methods of converting them to the corresponding terpolymers.
摘要:
Methods of converting essentially unpolymerized precursors into polyimides in which the precursors are exposed to microwave radiation. Preheating, thermal post-curing, and other techniques may be employed to promote the development of optimum properties; and reinforcements can be employed to impart strength and rigidity to the final product. Also disclosed are processes for making various composite artifacts in which non-polymeric precursors are converted to polyimides by using the techniques described above.
摘要:
The present teachings relate to a method and system for the processing of mail items within a multiple device document processing environment to ensure generation of unique mail items. The present teachings provides for an improved system and method for assigning and maintaining unique mail item identifiers and processing of the unique mail items in a multiple mail processing device environment to qualify for maximum postal work sharing discounts.
摘要:
Systems, methods, and an article of manufacture for automatically configuring a feeder system of a mail sorting system are shown and described. The feeder system is configured in accordance with a customer's mailing parameters. This improves the performance of the mail sorting system. In various examples, customer information associated with a processing job is received. A feeder profile is also received. The feeder system is automatically configured according to parameters of one or more of the customer information and feeder profile.
摘要:
A floating fountain apparatus includes a buoyant annular float having a central opening. A pump is secured to a lower side of the float. The pump has a propeller positioned to direct water through the central opening. A pump housing is positioned to receive water flow from the propeller and direct the water flow to a nozzle outlet. A lighting assembly is positioned within the central opening. The pump housing includes an upper pump housing and a lower pump housing. The lower pump housing has a water inlet and a hollow cylindrical outlet. The upper pump housing is slidably received within the cylindrical outlet and has a flow diverting surface to direct flow against an inner surface of the cylindrical outlet to create an annular flow of water. A plurality of vanes extends between the outer and inner members to divide a spacing between the members into a plurality of individual fluid flow pathways.
摘要:
A computerized method for learning a delivery point of a first mail piece by using unmatched and/or unused data from at least one other mail piece is disclosed. The method comprises the steps of: (a) capturing a text string from said other mail piece using capture means; (b) comparing said text string to a first set of preexisting data in an address database to determine a match for said other mail piece according to a first set of predetermined rules; (c) separating the matched and used data from the unmatched and unused data for said other mail piece determined by step (b); and (d)correlating said unmatched and/or unused data from said other mail piece to a second set of preexisting data relating to said first mail piece according to a second set of predetermined rules, wherein upon the presentation of a third mail piece to the capture means with the same intended delivery point as the first mail piece and having similar unmatched and/or unused data as the at least one other mail piece, the correct point of delivery for the third mail piece can be automatically determined.The invention further comprises a computerized system for learning a delivery point of a first mail piece by using unmatched data from at least one other mail piece, comprising: (a) means for capturing a data string of address information from said other mail piece; (b) a directory retrieval system database comprising a set of preexisting data relating to said other mail piece and further comprising means for separating matched data from the unmatched data; (c) a tag database comprising the unmatched data; (d) a tag archive; (e) means for correlating the unmatched data to the set of preexisting data according to a plurality of predetermined rules; (f) a rules database comprising said plurality of predetermined rules; and (g) a learning database to determine said delivery point of said first mail piece upon its presentation to the capture means after said other mail piece has been processed by the system.
摘要:
A copolyimide foam comprising the reaction product of one or more of an aromatic tetracarboxylic acid and a compound of the formula: ##STR1## where x is an integer from 1 to 12 and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are the same or different and are hydrogen or C.sub.1 to C.sub.6 linear or branched alkyl a mixture thereof with two or more diamines at least one of which being a heterocyclic diamine having a nitrogen atom in the ring and the other being a para- or meta-substituted aromatic diamine free of aliphatic substitution.Processes for producing the above copolyimide foam are also disclosed.
摘要:
Described are ways of improving the yields of specification grade polyimide foam on a consistent basis from one run to the next by use of improvements in microwave-based foaming processes. While a body of polyimide precursor is exposed to microwave radiation, the body of polyimide precursor and of the foam structure as it is developing therefrom are kept under a substantially vapor-impermeable microwave-compatible shroud that does not substantially restrict or impede development of the foam structure. For this purpose use may be made of a shroud composed of a polymer film. Mechanisms by which the shroud produces the improved results are discussed, and methods based thereon are set forth.
摘要:
Described are ways of improving the yields of specification grade polyimide foam on a consistent basis from one run to the next by use of improvements in microwave-based foaming processes. While a body of polyimide precursor is exposed to microwave radiation, the body of polyimide precursor and of the foam structure as it is developing therefrom are kept under a substantially vapor-impermeable microwave-compatible shroud that does not substantially restrict or impede development of the foam structure. For this purpose use may be made of a shroud composed of a polymer film. Mechanisms by which the shroud produces the improved results are discussed, and methods based thereon are set forth.