36results about How to "Improve skew" patented technology

Circular knit, elastic fabrics of at least one of single jersey, French terry, and fleece are disclosed that include a bare elastomeric material plated with spun and / or continuous filament hard yarns. The circular knit, elastic fabrics of at least one of single jersey, French terry, and fleece are manufactured by a method that does not require a dry heat setting step. The method requires drafting the bare elastomeric material no more than about 2.5× its original length when knitting to form the circular knit, elastic fabrics of at least one of single jersey, French terry, and fleece.

An image forming apparatus includes: an image forming part; a first conveyance roller that conveys a recording medium to the image forming part; a forward / reverse-rotatable second conveyance roller, located between the first conveyance roller and the image forming part in a conveyance direction of the recording medium; a contact member, in contact with the second conveyance roller, that forms a nip between the second conveyance roller and the contact member; a first conveyance roller driver that rotate-drives the first conveyance roller in the same direction as the conveyance direction of the recording medium; and a drive transmission mechanism that performs drive transmission from the first conveyance roller driver to the second conveyance roller so as to start rotation of the second conveyance roller in a reverse direction of the conveyance direction of the recording medium before a lead edge of the recording medium arrives at the nip.

There is realized a self-aligning roller bearing with retainer that stabilizes the orientation of spherical rollers and prevents these spherical rollers from skewing, and which can be rotated at high speed, and furthermore which enables efficient lubricant feed into pockets 9. By rotating a turning tool 14 as it revolves, the surfaces on both sides in the circumferential direction of respective column sections are processed into concave curved surfaces that oppose a rolling surface of the respective spherical rollers across a pocket clearance into which lubricant oil can be fed. The length of the column sections 8c is less than the length in the axial direction of the spherical rollers, and greater than a half of the length, and an end portion of the side surface in the circumferential direction of the respective column sections 8c projects further in the circumferential direction than an intermediate portion thereof, and the spherical rollers are embraced in the pockets 9.A self-aligning roller bearing with a retainer enabling high speed operation by stabilizing the attitude of barrel shaped rollers to prevent the barrel shaped rollers from being skewed and the efficient feeding of a lubricant into pockets (9) and a method of manufacturing the retainer for the self-aligning roller bearing. In the self-aligning roller bearing, the both side faces of each column part (8c) in the circumferential direction are machined to recessed curved faces facing the rolling surface of each barrel shaped roller through pocket clearances allowing the lubricant to feed thereto with a cutting tool (14) revolving while rotating on its axis. Also, the length of each column part (8c) is set equal to or less than the axial length of each barrel shaped roller and more than the half of the axial length thereof, the side face tip portion of each column part (8c) in the circumferential direction are projected from the intermediate portion thereof in the circumferential direction.

The invention discloses a dual-area slotting blast hole arrangement structure and a blasting sinking method applied to the structure. The structure comprises two blasting slotting hole areas symmetrically arranged with respect to the center of the free face of a courtyard, each blasting slotting hole area comprises a center charging hole and a plurality of empty holes arranged around the center charging hole; a ring of peripheral holes are formed in the periphery of each blasting slotting area, the center charging holes and the peripheral hoes are filled with explosive charges, and a plurality of auxiliary holes are formed between the blasting slotting areas and the peripheral holes and are filled with explosive charges. The method is simple in working procedure, operation is easy, the one-time sinking height is large, reliability is high, the sinking effect is good, the number of drilled holes is small, energy consumption is low, and the blasting vibration is small.

The invention relates to a manufacturing method for torsion balance composite yarn for knitting and belongs to the technical field of knitting. The existing spinning device is used, and when the composite yarn is spun, a piece of core yarn with the twisted direction opposite to that of spindle rotation is fed. Simultaneously, a relation between spindle rotation speed and core yarn twisting degree is adjusted, and when the ratio of the twisting degree generated by spindle rotation to the twisting degree of the fed core yarn is 50%-68%, wrap yarn with the twisted direction of inner-layer core yarn opposite to that of an outer-layer fiber strip is spun to achieve torsional balance of the yarn itself. Under the premise that an additional device is not added, and production cost is reduced, remaining torsion of the yarn is eliminated, biasfilling of knitted fabric is controlled fundamentally, cutting use rate of fabric is improved, and smoothness and appearance of fabric surface are maintained.