Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
75 words
A paper machine cylinder comprising shafts on which the cylinder is mounted to revolve by means of bearings, end flanges to which said shafts are respectively coupled, a mantle connected to said flanges at ends thereof and comprising grooves on an outer face thereof, wherein said cylinder comprises holes passing through the mantle and opening, at one end thereof, into said grooves and at an opposite end thereof, into an inner space within the mantle.
Claim 2
Dependent Claim
75 words
A paper machine cylinder comprising shafts on which the cylinder is mounted to revolve by means of bearings, end flanges to which said shafts are respectively coupled, a mantle connected to said flanges at ends thereof and comprising grooves on an outer face thereof, wherein said cylinder comprises holes passing through the mantle and opening, at one end thereof, into said grooves and at an opposite end thereof, into an inner space within the mantle.
Claim 3
Dependent Claim
18 words
The combination of claim 1, wherein said grooves are fitted over substantially an entire width of the cylinder.
Claim 4
Dependent Claim
14 words
The combination of claim 1, wherein said holes open into bottoms of said grooves.
Claim 5
Dependent Claim
56 words
The combination of claim 1, additionally comprising a source of negative or suction pressure, and a suction duct passing into the interior space of the cylinder or roll from said source and transmitting the negative or suction pressure thereof, whereby the negative or suction pressure is applied to substantially the entire inner face of the mantle.
Claim 6
Dependent Claim
31 words
The combination of claim 1, wherein perforations forming said holes are denser at least at one end of the cylinder or roll than in other areas of the cylinder or roll.
Claim 7
Dependent Claim
42 words
The combination of claim 5, wherein at the one end of the cylinder or roll, said perforations have been made into every groove, while at the other areas of the cylinder or roll, the perforations have not been made into every groove.
Claim 8
Dependent Claim
28 words
The combination of claim 6, wherein in a middle area of the cylinder or roll between the ends, said perforations are made into every second or third groove.
Claim 9
Dependent Claim
41 words
The combination of claim 1, wherein ratio of total cross-sectional area of said holes (A 0 ) in the cylinder or roll to total cross-sectional flow-area (A 1 ) of the grooves is within the range of about 1:10 to 1:150.
Claim 10
Dependent Claim
17 words
The combination of claim 8, wherein said ratio is within the range of about 1:50 to 1:110.
Claim 11
Dependent Claim
43 words
The combination of claim 1, wherein perforations forming said holes in the grooves are arranged such that air flow into the interior space through said holes in the cylinder or roll is within the range of about 500 to 1500 m 3 /m.h.
Claim 12
Dependent Claim
24 words
The combination of claim 10, wherein the air flow is within the range of about 800 m 3 /m.h. to 1200 m 3 /m.h.
Claim 13
Dependent Claim
77 words
A cylinder for guiding a web through a drying section of a paper machine, said cylinder comprising a hollow interior, a mantle situated about said hollow interior thereof, said mantle comprising a series of circumferential grooves thereabout, and said mantle comprising a series of holes passing through the mantle and opening, at one end thereof, into at least several of said circumferential grooves, and opening, at an opposite end thereof, into the interior space of the cylinder.
Claim 14
Dependent Claim
77 words
A cylinder for guiding a web through a drying section of a paper machine, said cylinder comprising a hollow interior, a mantle situated about said hollow interior thereof, said mantle comprising a series of circumferential grooves thereabout, and said mantle comprising a series of holes passing through the mantle and opening, at one end thereof, into at least several of said circumferential grooves, and opening, at an opposite end thereof, into the interior space of the cylinder.
Claim 15
Dependent Claim
47 words
The combination of claim 1, wherein ratio of total cross-sectional flow area of said holes (A 0 ) in the cylinder or roll to total cross-sectional area of the entire outside mantle face of the cylinder, is within the range of about 1 to 2 per mill.
Claim 16
Dependent Claim
13 words
The combination of claim 13, wherein the ratio is about 1.5 per mill.