Abstract A sealing means for permitting continuous passage of a web material through a gap in a wall separating two zones at different pressures whilst minimising the flow of air from one zone to the other, comprising, built into the gap, two bearing members between which the web material passes, the first bearing member comprising a series of parallel, closely abutting, fingers which extend the full length of the gap, said fingers being pivoted on an axle which is parallel to a longitudinal edge of the gap, and each of the fingers being pressure loaded towards the second bearing member so as to maintain firm contact with either the web material or with the second bearing member, seals being provided between the fingers and the adjacent edges of the gap and also between the second bearing member and the adjacent edges of the gap, and the use of such sealing means in apparatus primarily intended for the continuous vacuum transfer printing of synthetic textile materials.
A sealing means for permitting continuous pasage of a web material through a gap in a wall separating two zones at different pressures whilst minimising the flow of air from one zone to the other, comprising, built into the gap, two bearing members between which the web material passes, the first bearing member comprising a series of parallel, closely abutting, fingers which extend the full length of the gap, said fingers being pivoted on an axle which is parallel to a longitudinal edge of the gap, and each of the fingers being pressure loaded towards the second bearing member so as to maintain firm contact with either the web material or with the second bearing member, seals being provided between the fingers and the adjacent edges of the gap and also between the second bearing member and the adjacent edges of the gap.
Claim 2
Dependent Claim
143 words
A sealing means for permitting continuous pasage of a web material through a gap in a wall separating two zones at different pressures whilst minimising the flow of air from one zone to the other, comprising, built into the gap, two bearing members between which the web material passes, the first bearing member comprising a series of parallel, closely abutting, fingers which extend the full length of the gap, said fingers being pivoted on an axle which is parallel to a longitudinal edge of the gap, and each of the fingers being pressure loaded towards the second bearing member so as to maintain firm contact with either the web material or with the second bearing member, seals being provided between the fingers and the adjacent edges of the gap and also between the second bearing member and the adjacent edges of the gap.
Claim 3
Dependent Claim
32 words
A sealing means as claimed in claim 1 wherein the second bearing member is a cylindrical roller rotatable about a longitudinal axle which is parallel to the lowest edge of the gap.
Claim 4
Dependent Claim
46 words
A sealing means as claimed in claim 1 wherein the fingers in the centre of the first bearing member are combined together, the width of the combined unit being less than the width of the web material which is to be passed through the sealing means.
Claim 5
Dependent Claim
22 words
A sealing means as claimed in claim 1 which additionally contains two continuous flexible belts which pass between the two bearing members.