Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
160 words
In apparatus including a belt driving roller, a belt guiding roller, an endless slightly elastic belt trained about and extending between said rollers under tension and means mounting said guiding roller for displacement thereof to remedy sideward travel of the belt, said guiding roller having a rigid bearing support for each end thereof, the improvement wherein said mounting means comprise a rigid member rigidly connected with each said bearing support, rigid structures respsectively for supporting said members and thus said guiding roller, and inclined guide tracks on each of said structures and upon and along which parts of one of said rigid members are supported and slidable in limited paths, said guide tracks mutually being so oppositely inclined that straight line projections of said paths intersect at or near to a point lying away from the axis of said guiding roller on a line connecting the mid-point of that axis with the mid-point of the axis of said driving roller.
Claim 2
Dependent Claim
160 words
In apparatus including a belt driving roller, a belt guiding roller, an endless slightly elastic belt trained about and extending between said rollers under tension and means mounting said guiding roller for displacement thereof to remedy sideward travel of the belt, said guiding roller having a rigid bearing support for each end thereof, the improvement wherein said mounting means comprise a rigid member rigidly connected with each said bearing support, rigid structures respsectively for supporting said members and thus said guiding roller, and inclined guide tracks on each of said structures and upon and along which parts of one of said rigid members are supported and slidable in limited paths, said guide tracks mutually being so oppositely inclined that straight line projections of said paths intersect at or near to a point lying away from the axis of said guiding roller on a line connecting the mid-point of that axis with the mid-point of the axis of said driving roller.
Claim 3
Dependent Claim
41 words
Apparatus according to claim 1, each of said rigid members comprising a flange lying adjacent to a side edge of said belt in position to be engaged by said edge upon excessive sideward travel of the belt on said guiding roller.
Claim 4
Dependent Claim
60 words
Apparatus according to claim 1, there being at each end of said guiding roller one of said rigid members and two of said guide tracks, said two tracks lying respectively at opposite sides of said guiding roller, said one of said rigid members having thereon two spaced apart parts which respectively are supported upon and slidable along said two tracks.
Claim 5
Dependent Claim
52 words
Apparatus according to claim 1, each of said guide tracks being a ball track having one or two bearing balls thereon, the coacting part of the rigid member supported thereon being a ball track member engaging said ball or balls at a side thereof opposite to that engaged by said ball track.
Claim 6
Dependent Claim
53 words
Apparatus according to claim 1, said supporting structures comprising rigid arms having said guide tracks fixed thereto and having end portions mounted for pivotal movement about the axis of said driving roller so that said arms and said guiding roller with the belt thereon may be swung away from their normal working position.
Claim 7
Dependent Claim
67 words
Apparatus according to claim 1 for developing photo-printing sheets with a gaseous developer, including a tank for said developer having a perforated wall through which the developer is passed onto said sheets while the sheets are moved over said wall, wherein the said endless belt in normal working position has a flight thereof between said rollers bearing against said wall for transporting said sheets over said wall.