US3750305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Web dryer
Assignee: Individual
•
Filing: 1971-10-26
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Granted: 1973-08-07
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Expires: 1991-10-26
Abstract
Abstract A dryer for webs having freshly applied printed designs and coatings is disclosed. The dryer has an involute conduit formed of a plurality of runs disposed angularly with respect one to the others. The web is drawn through the conduit and exits from the conduit into a central cavity in which is disposed a receiving element for receiving the then dry web. Heated air is introduced into the conduit for drying the web and carrying off the volatile constitutents of the material applied to the web. When the receiving element is a take-up reel, a leader greater in length than the conduit is used to draw the leading edge of the web through the dryer. A photocell sensor determines the presence of a portion of the web to be dried and causes the take-up reel to be driven to draw the web through the dryer.
Inventors
- 👤 A Loser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:20
CPC Classifications
F; F26; F26B; F26B13/00; F26B13/006
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
187 words
Apparatus for drying a web having a wetted surface comprising a conduit formed of first, second and third substantially straight runs, the longitudinal axis of the runs arranged in a triangular array, the first run being generally horizontally disposed and including a web entrance, the second run extending angularly downwardly beneath the first run and the third run extending angularly upwardly from the end of the second run toward the first run, the angles of the longitudinal axis of each of the second and third runs with respect to a horizontal plane being such that the web is supported with the wetted surface thereof free from contact with the interior surfaces of the conduit as the web travels through the conduit, joining means for joining the first run to the second run and joining means for joining the second run to the third run, the intersection of the second run and third run being beneath the first run, a cavity formed within the triangular array of runs, receiving means mounted within the cavity for receiving the web, and means for introducing a drying gas into the conduit.
Claim 2
Dependent Claim
187 words
Apparatus for drying a web having a wetted surface comprising a conduit formed of first, second and third substantially straight runs, the longitudinal axis of the runs arranged in a triangular array, the first run being generally horizontally disposed and including a web entrance, the second run extending angularly downwardly beneath the first run and the third run extending angularly upwardly from the end of the second run toward the first run, the angles of the longitudinal axis of each of the second and third runs with respect to a horizontal plane being such that the web is supported with the wetted surface thereof free from contact with the interior surfaces of the conduit as the web travels through the conduit, joining means for joining the first run to the second run and joining means for joining the second run to the third run, the intersection of the second run and third run being beneath the first run, a cavity formed within the triangular array of runs, receiving means mounted within the cavity for receiving the web, and means for introducing a drying gas into the conduit.
Claim 3
Dependent Claim
21 words
Apparatus according to claim 1 wherein the conduit includes a fourth run disposed beneath the first run and generally parallel thereto.
Claim 4
Dependent Claim
87 words
Apparatus for drying a web comprising, a closed involute conduit having a surface therein for supporting a web with one surface thereof free from contact with the interior surfaces of the conduit, the conduit having at least one vertical direction change therein; a cavity defined by the conduit; means for effecting drying of the web; and a reel disposed in the cavity for receiving a dried portion of the web; and a leader of a length greater than the length of the conduit attached to the reel.
Claim 5
Dependent Claim
87 words
Apparatus for drying a web comprising, a closed involute conduit having a surface therein for supporting a web with one surface thereof free from contact with the interior surfaces of the conduit, the conduit having at least one vertical direction change therein; a cavity defined by the conduit; means for effecting drying of the web; and a reel disposed in the cavity for receiving a dried portion of the web; and a leader of a length greater than the length of the conduit attached to the reel.
Claim 6
Dependent Claim
87 words
Apparatus for drying a web comprising, a closed involute conduit having a surface therein for supporting a web with one surface thereof free from contact with the interior surfaces of the conduit, the conduit having at least one vertical direction change therein; a cavity defined by the conduit; means for effecting drying of the web; a reel disposed within the cavity; drive means for driving the reel; and control means responsive to the presence of portions of the web to be dried for actuating the drive means.
Claim 7
Dependent Claim
87 words
Apparatus for drying a web comprising, a closed involute conduit having a surface therein for supporting a web with one surface thereof free from contact with the interior surfaces of the conduit, the conduit having at least one vertical direction change therein; a cavity defined by the conduit; means for effecting drying of the web; a reel disposed within the cavity; drive means for driving the reel; and control means responsive to the presence of portions of the web to be dried for actuating the drive means.
Claim 8
Dependent Claim
56 words
Apparatus according to claim 4 wherein the closed conduit includes a first substantially horizontal run having entry means at one end thereof for providing entry of the web into the conduit, and wherein the control means includes a photocell detector means position to detect the presence of portions of the web disposed below the entry means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |