Abstract: An intermediate device 10A includes a transfer unit 11 that transfers a request including data to be transmitted from a local 30 to a remote 50, and a generation unit 12 that generates a pseudo-response to the request and returns the pseudo-response to the local 30. The intermediate device 10B includes a discard unit 13 that discards a response to the request from the remote 50. An intermediate device 20B includes a generation unit 22 that generates a pseudo-request based on an initial request for requesting data transmission from the local 30 to the remote 50 and transmits the pseudo-request to the remote 50, and a transfer unit 24 that transfers a response including data to be transmitted from the remote 50 to the local 30. The intermediate device 20A includes the discard unit 21 that discards a subsequent request from the local 30.

Abstract: Apparatus for making folds or bends of adjustable length in sheet metal. The apparatus includes a retractable chain-like die which can be shortened or lengthened so as to adjust the operative length of the die.

Abstract: This disclosure relates to a roll forming machine having a plurality of sequentially-arranged forming units adapted to progressively bend edges of metal sheet into a given shape. The forming units include upper and lower rollers between which the metal sheet is fed and having axes of rotation inclined to one another. Each of the lower rollers includes a bending portion and a holding portion defining a predetermined angle therebetween. The upper roller has two frusto-conical peripheries disposed in confronting relation to the working surfaces of the lower roller and spaced therefrom by a distance corresponding to the thickness of the sheet metal. In order to accommodate sheet metals of different thicknesses, the spacing between the upper and lower rollers may be varied by mounting the upper roller on a swingable mounting means whereby the upper roller is swung along a relatively short arc which approximates a linear path bisecting the angle defined by the working surfaces of the lower roller.