US3891376A — Apparatus for the continuous production of chipbo…

Claim 1

Independent Claim 155 words

Apparatus for the continuous production of boards such as chipboards, fibreboards and the like; said apparatus comprising: an endless band, pressing means, guiding and moving means for guiding and moving said band with a surface of said band in facing relationship to a pressing surface of said pressing means over a material pressing portion of the travel path of said band such that material forming said boards can be conveyed by and compressed between said band and said pressing surface along said material pressing portion, a plurality of heat transfer elements disposed adjacent portions of the travel path of said band, said heat transfer elements being spaced from one another in a direction transverse to the travel path of said band, and temperature control means for maintaining said elements at different temperatures with respect to one another for accommodating transfer of different heat levels between the respective elements and respective width portions of the band.

Claim 2

Dependent Claim 155 words

Apparatus for the continuous production of boards such as chipboards, fibreboards and the like; said apparatus comprising: an endless band, pressing means, guiding and moving means for guiding and moving said band with a surface of said band in facing relationship to a pressing surface of said pressing means over a material pressing portion of the travel path of said band such that material forming said boards can be conveyed by and compressed between said band and said pressing surface along said material pressing portion, a plurality of heat transfer elements disposed adjacent portions of the travel path of said band, said heat transfer elements being spaced from one another in a direction transverse to the travel path of said band, and temperature control means for maintaining said elements at different temperatures with respect to one another for accommodating transfer of different heat levels between the respective elements and respective width portions of the band.

Claim 3

Dependent Claim 84 words

Apparatus according to claim 1, wherein said temperature control means includes means for controlling the temperature of each of said heat transfer elements such that the temperature of said band is substantially constant across the width of the band when the band is disposed along said material pressing portions, whereby material forming said boards is compressed along said material pressing portion to substantially the same thickness over the entire width of the boards in a direction transverse to the travel path of said band.

Claim 4

Dependent Claim 14 words

Apparatus according to claim 1, wherein said pressing means is a rotatable pressing drum.

Claim 5

Dependent Claim 13 words

Apparatus according to claim 1, wherein said endless band is a steel band.

Claim 6

Dependent Claim 14 words

Apparatus according to claim 2, wherein said pressing means is a rotatable pressing drum.

Claim 7

Dependent Claim 13 words

Apparatus according to claim 5, wherein said endless band is a steel band.

Claim 8

Dependent Claim 85 words

Apparatus according to claim 3, wherein said guiding and moving means include guide and feed rollers, wherein said plurality of heat transfer elements includes a plurality of heat transfer elements extending circumferentially of at least one of said pressing drum and said rollers, said lastmentioned heat transfer elements being spaced from one another in a direction transverse to the travel path of said band for accommodating transfer of different heat levels between the respective elements and respective width portions of the respective drum and rollers.

Claim 9

Dependent Claim 84 words

Apparatus according to claim 7, wherein said temperature control means includes means for controlling the temperature of each of said heat transfer elements such that the temperature of said band is substantially constant across the width of the band when the band is disposed along said material pressing portions, whereby material forming said boards is compressed along said material pressing portion to substantially the same thickness over the entire width of the boards in a direction transverse to the travel path of said band.

Claim 10

Dependent Claim 53 words

Apparatus according to claim 3, wherein said guiding and moving means includes guide rollers spaced substantially from said pressing drum and feed rollers immediately adjacent said pressing drum, and wherein said heat transfer elements include a plUrality of heat transfer elements positioned adjacent said band travel path between said guide and feed rollers.

Claim 11

Dependent Claim 47 words

Apparatus according to claim 9, further comprising a forming station for supplying material for said boards to said band at a position between said guide and feed rollers, said forming station being disposed on the side of said band opposite said last-mentioned plurality of heat transfer elements.

Claim 12

Dependent Claim 62 words

Apparatus according to claim 3, wherein said pressing drum is shaped as a rotatable cylinder with the pressing surface formed on the cylindrical outward facing walls thereof and with side walls closing off the respective ends of the cylinder, and wherein heat transfer elements are disposed inside said drum in openings formed in said walls for accommodating heating of said side walls.

Claim 13

Dependent Claim 35 words

Apparatus according to claim 11, wherein the number of heating elements in said side walls is larger adjacent the cylindrical outward facing walls than in the area of the axis of rotation of the drum.

Claim 14

Dependent Claim 33 words

Apparatus according to claim 8, wherein said last-mentioned heat transfer elements are electrically actuable and extend circumferentially of said pressing drum and are connected via separate wires to respective different electrical slide contacts.

Claim 15

Dependent Claim 21 words

Apparatus according to claim 2, wherein each of said heat transfer elements include one of steam, water and oil actuable elements.

Claim 16

Dependent Claim 16 words

Apparatus according to claim 2, wherein said heat transfer elements include both cooling and heating elements.

Claim 17

Dependent Claim 61 words

Apparatus according to claim 2, wherein said temperature control means includes means for cooling the heat transfer elements in the area of the edge portions of said band to a lower temperature than the adjacent heat transfer elements in the area of the middle width portions of the band so that excess thickness of edge portions of the boards is reduced.

Claim 18

Dependent Claim 62 words

Apparatus according to claim 2, wherein said temperature control means includes means for heating the heat transfer elements in the area of the edge portions of said band to a higher temperature than the adjacent heat transfer elements in the area of the middle width portions of the band so that the thickness of the edge portions of the boards is increased.

Claim 19

Dependent Claim 62 words

Apparatus according to claim 16, wherein said temperature control means includes means for heating the heat transfer elements in the area of the edge portions of said band to a higher temperature than the adjacent heat transfer elements in the area of the middle width portions of the band so that the thickness of the edge portions of the boards is increased.

Claim 20

Dependent Claim 21 words

Apparatus according to claim 2, wherein said temperature control means includes means for selectively switching heat supply to each transfer element.

Claim 21

Dependent Claim 40 words

Apparatus according to claim 2, wherein said temperature control means includes means responsive to the detected thickness along various width portions of the boards exiting from said material pressing portion for varying the temperature of the respective heat transfer elements.

Claim 22

Dependent Claim 61 words

Apparatus according to claim 20, wherein said temperature control means includes means for cooling the heat transfer elements in the area of the edge portions of said band to a lower temperature than the adjacent heat transfer elements in the area of the middle width portions of the band so that excess thickness of edge portions of the boards is reduced.

Claim 23

Dependent Claim 62 words

Apparatus according to claim 20, wherein said temperature control means includes means for heating the heat transfer elements in the area of the edge portions of said band to a higher temperature than the adjacent heat transfer elements in the area of the middle width portions of the band so that the thickness of the edge portions of the boards is increased.

Claim 24

Dependent Claim 125 words

Apparatus according to claim 8, wherein said guide and feed rollers include: a first guide roller positioned above and immediately downstream of the press drum with respect to the travel path of said band, a second guide rolleR spaced downstream of said first guide roller at the same level as said press drum, a third guide roller spaced downstream of said second guide roller and immediately below said press drum to also serve as a feed roller, a fourth guide roller spaced downstream of said third guide roller at a level slightly above the bottom of said press drum, and a further feed roller spaced downstream of said fourth guide roller and immediately upstream of and adjacent to the lower part of said press drum.

Claim 25

Dependent Claim 66 words

Apparatus according to claim 23, wherein said material pressing portion of the travel path of said band extends over more than half the circumference of said press drum from said further feed roller to adjacent said first guide roller, and wherein a forming station is provided for introducing board material to said band at a position between said fourth guide roller and said further feed roller.

Claim 26

Dependent Claim 41 words

Apparatus according to claim 24, wherein a plurality of said heat transfer elements are arranged in side-by-side relationship between said fourth guide roller and said further feed roller and at the side of said band facing away from said forming station.

Claim 27

Dependent Claim 41 words

Apparatus according to claim 25, wherein a plurality of said heat transfer elements are arranged in side-by-side relationship at both sides of said band and between said first and second, said second and third, and said third and fourth guide rollers.

Claim 28

Dependent Claim 33 words

Apparatus according to claim 26, wherein a plurality of said heat transfer elements are arranged in side-by-side relationship adjacent to said band in facing relationship to the outer surface of said press drum.

Claim 29

Dependent Claim 53 words

Apparatus according to claim 27, wherein said temperature control means includes means for separately controlling the temperature of the various heat transfer elements so as to effect an effective control of the temperature gradient across the width of said band with a resultant optimization of the thickness control for the boards being produced.

Claim 30

Dependent Claim 27 words

Apparatus according to claim 1, wherein said heat transfer elements are arranged parallel to one another and extend parallel to the travel path of said endless band.

Claim 31

Dependent Claim 169 words

Apparatus for the continuous production of boards such as chipboards, fibreboards and the like; said apparatus comprising: first pressing means, second pressing means, guiding and moving means for guiding and moving said first pressing means with a surface of said first pressing means in facing relationship to a pressing surface of said second pressing means over a material pressing portion of the travel path of said first pressing means such that material forming said boards can be conveyed by and compressed between said first and second pressing means along said material pressing portion, a plurality of heat transfer elements disposed adjacent portions of the travel path of said first pressing means, said heat transfer elements being spaced from one another in a direction transverse to the travel path of said first pressing means, and temperature control means for maintaining said elements at different temperatures with respect to one another for accommodating transfer of different heat levels between the respective elements and respective width portions of the first pressing means.

Claim 32

Dependent Claim 169 words

Apparatus for the continuous production of boards such as chipboards, fibreboards and the like; said apparatus comprising: first pressing means, second pressing means, guiding and moving means for guiding and moving said first pressing means with a surface of said first pressing means in facing relationship to a pressing surface of said second pressing means over a material pressing portion of the travel path of said first pressing means such that material forming said boards can be conveyed by and compressed between said first and second pressing means along said material pressing portion, a plurality of heat transfer elements disposed adjacent portions of the travel path of said first pressing means, said heat transfer elements being spaced from one another in a direction transverse to the travel path of said first pressing means, and temperature control means for maintaining said elements at different temperatures with respect to one another for accommodating transfer of different heat levels between the respective elements and respective width portions of the first pressing means.

Claim 33

Dependent Claim 90 words

Apparatus according to claim 30, wherein said temperature control means includes means for controlling the temperature of each of said heat transfer elements such that the temperature of said first pressing means is substantially constant across the width of the first pressing means when the first pressing means is disposed along said material pressing portion, whereby material forming said boards is compressed along said material pressing portion to substantially the same thickness over the entire width of the boards in a direction transverse to the travel path of said band.

Claim 34

Dependent Claim 66 words

Apparatus according to claim 31, wherein said temperature control means includes means for heating the heat transfer elements in tHe area of the edge portions of said first pressing means to a higher temperature than the adjacent heat transfer elements in the area of the middle width portions of the first pressing means so that the thickness of the edge portions of the boards is increased.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1978-06-23	1978-12-23	1979-06-24	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1982-06-23	1982-12-23	1983-06-24	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1986-06-23	1986-12-23	1987-06-24	$7700.00	Window Closed / Lapsed

Apparatus for the continuous production of chipboard or like material

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