EP0094631A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Webbing system
Assignee: MOTTER PRINTING PRESS Co
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Filing: 1983-05-11
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Granted: —
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Expires: 2003-05-11
Abstract
Abstract Apparatus for threading a web (25) through a printing press (20) includes a single cable (33) extending through the press (20) along the web path on one side of the web (25). The leading edge (58) of the web (25) is connected to the cable (33) by a leader (56), so that the web (25) is pulled through the printing press (20) when the cable (33) is driven. The cable (25) is supported by sheaves (45) that are mounted coaxially with the lead rollers (44) that guide the web (25) through the press (20).
Inventors
- 👤 Rex D. Stone
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 02:32
CPC Classifications
B; B41; B41F; B41F13/00; B41F13/02; B41F13/03
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
194 words
Apparatus for threading a web (25) from a web unwind roll (30) through a printing press having a pair of side frames (50) between which are mounted press elements of at least one press (20) unit, each unit including a plurality of lead rollers (44) for guiding the web through the unit and between a first cylinder (21) adapted to apply ink to the web (25) and a second cylinder, comprising a cable (33) disposed between the side frames (50) and extending substantially parallel to and coplanar with the part of the web (25) through the printing press, a plurality of sheaves (45) for supporting the cable (33), each sheave (45) mounted adjacent to and coaxially with a different one of the lead rollers (44), the diameter of each sheave being such that the centerline of the portion of the cable (33) engaged by the sheave (45) is substantially coplanar with the surface of the corresponding lead roller (44), means for connecting the leading edge (58) of the web (25) to the cable (33), and means for driving the cable (33) in the direction to feed the web (25) through the printing press (20).
Claim 2
Dependent Claim
194 words
Apparatus for threading a web (25) from a web unwind roll (30) through a printing press having a pair of side frames (50) between which are mounted press elements of at least one press (20) unit, each unit including a plurality of lead rollers (44) for guiding the web through the unit and between a first cylinder (21) adapted to apply ink to the web (25) and a second cylinder, comprising a cable (33) disposed between the side frames (50) and extending substantially parallel to and coplanar with the part of the web (25) through the printing press, a plurality of sheaves (45) for supporting the cable (33), each sheave (45) mounted adjacent to and coaxially with a different one of the lead rollers (44), the diameter of each sheave being such that the centerline of the portion of the cable (33) engaged by the sheave (45) is substantially coplanar with the surface of the corresponding lead roller (44), means for connecting the leading edge (58) of the web (25) to the cable (33), and means for driving the cable (33) in the direction to feed the web (25) through the printing press (20).
Claim 3
Dependent Claim
29 words
The apparatus according to claim 1 wherein the connecting means includes a leader (56) attached to the leading edge (58) of the web (25) and to the cable (33).
Claim 4
Dependent Claim
47 words
The apparatus according to claim 2 wherein the leading edge (58) of the web (25) includes a leading corner (60) adjacent the cable (33) and forms at the leading corner (60) an acute angle with the lateral edge (61) of the web (25) adjacent the cable (33).
Claim 5
Dependent Claim
37 words
The apparatus according to claim 3 wherein the leading edge (58) of the web (25) forms an angle that does not exceed approximately 25° with the lateral edge (57) of the web (25) adjacent the cable (33).
Claim 6
Dependent Claim
27 words
The apparatus according to claim 3 wherein the leader (56) includes a tape (66) extending along and attached to the leading edge (58) of the web (25).
Claim 7
Dependent Claim
34 words
. The apparatus according to claim 5 including a reinforcing tape (64) extending from the leading corner (60) along and attached to the lateral edge (57) of the web (25) adjacent the cable (33).
Claim 8
Dependent Claim
23 words
The apparatus according to claim 2 wherein the leader (56) includes elastomeric means for resiliently connecting the web (25) to the cable (33).
Claim 9
Dependent Claim
28 words
The apparatus according to claim 2 wherein the cable (33) includes means forming a ring and the leader (56) includes a hook adapted to engage the ring means.
Claim 10
Dependent Claim
64 words
The apparatus according to claim 8 wherein the leader (56) includes a belting to one end of which the hook is secured and a plastic film of generally triangular shape, the leading corner (56) of the film being connected to the other end of the belting and the opposite side of the film being attached to the leading edge (58) of the web (25).
Claim 11
Dependent Claim
11 words
The apparatus according to claim 9 wherein the belting is elastomeric.
Claim 12
Dependent Claim
23 words
The apparatus according to claim 9 wherein the leader (56) includes elastomeric means for resiliently connecting the web (25) to the cable (33).
Claim 13
Dependent Claim
57 words
The apparatus according to claim 1 including a guide (70) mounted between at least some of the sheaves (45) and their corresponding lead rollers (44) and having a cylindrical surface coplanar with at least a portion of the surface of the corresponding lead roller (44), the guide (70) supporting the connecting means as it passes that sheave.
Claim 14
Dependent Claim
19 words
The apparatus according to claim 1 including at least one means for taking up slack in the cable (33).
Claim 15
Dependent Claim
42 words
The apparatus according to claim 13 wherein the take-up means includes a sheave (77) for engaging the cable (33); the sheave (77) being mounted for displacement toward and away from the cable (33), and means for biasing the sheave toward the cable.
Claim 16
Dependent Claim
31 words
The apparatus according to claim 14 wherein the sheave (77) is mounted for rotation on a pivoted arm (135), and the biasing means includes a weight connected to the pivoted arm.
Claim 17
Dependent Claim
21 words
The apparatus according to claim 14 including means for displacing the sheave and the cable engaged thereby by a predetermined amount.
Claim 18
Dependent Claim
94 words
The apparatus according to claim 1 wherein one of the first and second cylinders is mounted for movement toward and away from the other, and including a plurality of sheaves for supporting the cable mounted adjacent to each movable cylinder, such sheaves being mounted so that when the movable cylinder is moved a predetermined distance away from the other cylinder to permit the web to be threaded therebetween the length of the path of the web equals the length of the path of the cable in the vicinity of the first and second cylinders.
Claim 19
Dependent Claim
35 words
The apparatus according to claim 17 including a guide mounted between at least some of the plurality of sheaves and the corresponding movable cylinder, the guide supporting the connecting means as it passes that sheave.
Claim 20
Dependent Claim
33 words
The apparatus according to claim 1 wherein at least one lead roller is mounted for movement transverse to its axis and the corresponding sheave is mounted for transverse movement with its lead roller.
Claim 21
Dependent Claim
62 words
The apparatus according to claim 1 wherein the cable driving means includes a drive drum mounted for rotation on at least one of the side frames, the leading end of the cable being secured to the drive drum, and means for rotating the drive drum so as to pull the cable in the direction to feed the web through the printing press.
Claim 22
Dependent Claim
60 words
The apparatus according to claim 20 including a rewind drum mounted for rotation on at least one of the side frames, the trailing end of the cable being secured to the rewind drum, and means for rotating the rewind drum so as to rewind the cable on the rewind drum after the web has been threaded through the printing press.
Claim 23
Dependent Claim
68 words
The apparatus according to claim 1 wherein at least one lead roller in each unit is mounted for rotation independently of the corresponding sheave and including clutch means for releasably connecting that lead roller and its sheave for rotation together, and means for activating the clutch means so that the cable rotates that lead roller when the cable is pulled to feed the web through the printing press.
Claim 24
Dependent Claim
66 words
The apparatus according to claim 22 wherein the clutch means includes at least one piston mounted in the end of the lead roller adjacent the sheave for reciprocation between an extended position in which the lead roller and the sheave are connected and a retracted position in which the lead roller and the sheave are disconnected, and means for biasing each piston toward its retracted position.
Claim 25
Dependent Claim
27 words
The apparatus according to claim 23 wherein the activating means includes means for applying fluid under pressure to each piston to drive it to the extended position.
Claim 26
Dependent Claim
94 words
The apparatus according to claim 1 including a waste web roller for winding the leading portion of the web after the web has been threaded through the printing press, a sheave for supporting the cable mounted adjacent to and coaxially with the waste web roller, means adapted to cooperate with the waste web roller for winding the leading portion of the web on the waste web roller, and means for cutting the connecting means after the cooperating means and the waste web roller have begun to wind the web on the waste web roller.
Claim 27
Dependent Claim
59 words
The apparatus according to claim 25 wherein the waste web roller is mounted for rotation independently of its sheave and including clutch means for releasably connecting the waste web roller and its sheave for rotation together, and means for activating the clutch means so that the cable rotates the waste web roller when the web is being wound thereon.
Claim 28
Dependent Claim
60 words
The apparatus according to claim 25 wherein the cooperating means includes a tape mounted to engage a portion of the circumference of the waste web roller and move therewith so as to engage the connecting means when the connecting means is fed therebetween, and the cutting means cuts the connecting means at a location between the sheave and the tape.
Claim 29
Dependent Claim
34 words
The apparatus according to claim 27 wherein the connecting means includes a leader attached to the leading edge of the web and to the cable, and the cutting means includes a rotary knife blade.
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US3587461A
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FR2318091A1
Cited
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Cited
GB2026669A
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