Patent US3044485A successfully refreshed from Google Patents.
US3762031A
Expired / Lapsed
US
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Method for manufacturing elongate heat-exchange element blanks
Assignee: GRANGES ESSEN SW AB
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Filing: 1971-02-04
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Granted: 1973-10-02
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Expires: 1991-02-04
Abstract
Abstract A method and apparatus for manufacturing elongate heat-exchanger blanks composed of a basic substrate profile having at least one length of corrugated metal foil strip mechanically bonded thereto. A basic elongate profile string is advanced at a predetermined speed along a fixed path and at least one strip corrugating device is arranged to produce a continuous length of corrugated strip and to feed the strip into the path of the basic profile via a number of corrugated strip cutting and feed means. These latter means operate cyclically to cut the strip at predetermined intervals and to join the cut lengths of strip to the basic profile string in spaced relationship at a frequency corresponding to the intervals.
Inventors
- 👤 K Jonason
- 👤 K Karlsson
- 👤 A Remning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:07
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; B21D53/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49366
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
175 words
A method of manufacturing elongate heat exchange element blanks of the type comprising a base element having arranged therealong and in metallic contact therewith at least one corrugated metal foil strip, said method comprisiNg feeding an elongated base element in a longitudinal direction at a predetermined speed, periodically feeding at least one continuous strip of corrugated foil along a separate path of travel from the base element but at the same time thereas, cutting from the strip of foil during each period in which the advance of the foil is halted a portion at the front end of the strip, continuously removing successive cut portions of the strip to advance the portions at spaced intervals away from the remainder of the strip, feeding said cut portions of the strip along a path in abutment with the advancing base element at intervals therealong, soldering said cut portions to the base element at mutual points of contact, and thereafter cutting the base element in the intervals between the cut portions which are soldered to the base element.
Claim 2
Independent Claim
175 words
A method of manufacturing elongate heat exchange element blanks of the type comprising a base element having arranged therealong and in metallic contact therewith at least one corrugated metal foil strip, said method comprisiNg feeding an elongated base element in a longitudinal direction at a predetermined speed, periodically feeding at least one continuous strip of corrugated foil along a separate path of travel from the base element but at the same time thereas, cutting from the strip of foil during each period in which the advance of the foil is halted a portion at the front end of the strip, continuously removing successive cut portions of the strip to advance the portions at spaced intervals away from the remainder of the strip, feeding said cut portions of the strip along a path in abutment with the advancing base element at intervals therealong, soldering said cut portions to the base element at mutual points of contact, and thereafter cutting the base element in the intervals between the cut portions which are soldered to the base element.
Claim 3
Dependent Claim
75 words
A method as claimed in claim 1 comprising applying suction to the strip to advance the same along its path of travel and to hold the strip in place during the cutting operation, and limiting the region where the suction is applied to the strip so that no suction prevails at the location where the cut portions of the strip are removed from the remainder of the strip thereby facilitating removal of such cut portions.
Claim 4
Dependent Claim
37 words
A method as claimed in claim 2 wherein the spacing between successive cut portions fed to the base element is controlled by regulating the time period during which the foil is halted and the portions cut therefrom.
Claim 5
Dependent Claim
35 words
A method as claimed in claim 2 wherein the corrugated strip is advanced on a movable transport surface which is driven periodically, the strip being retained against said surface and carried therewith by said suction.
Claim 6
Dependent Claim
27 words
A method as claimed in claim 4 wherein the cut portions are drawn from the strip and fed onto a second transport surface which is driven continuously.
Claim 7
Dependent Claim
34 words
A method as claimed in claim 5 comprising separating the cut portions from the strip advanced by the periodically driven transport surface by blowing the cut portions away from the periodically driven transport surface.
Claim 8
Dependent Claim
23 words
A method as claimed in claim 5 comprising applying suction to the cut portions to hold the same against the second transport surface.
Claim 9
Dependent Claim
38 words
A method as claimed in claim 6 comprising forming the transport surfaces on rotating members whose linear speed at said surfaces is substantially the same, whereby the strip and the cut portions are fed at the same speed.
Claim 10
Dependent Claim
29 words
A method as claimed in claim 8 comprising effecting the cutting of the strip after the latter has undergone a predetermined length of travel by said first transport surface.
Claim 11
Dependent Claim
23 words
A method as claimed in claim 8 wherein the cut portions are fed to the advancing base element by the second transport surface.
Claim 12
Dependent Claim
44 words
A method as claimed in claim 10 comprising applying molten solder to the cut portions and cooling the solder after the cut portions have been brought into contact with the base element to establish metallic contact between the base element and the cut portions.
Claim 13
Dependent Claim
200 words
A method as claimed in claim 11 comprising advancing a substantially smooth strip of metal foil, deforming said strip to form repeated transversely extending folds or loops, compressing the thus formed strip in its longitudinal direction so that the folds are raised and brought permanently into close proximity to form said strip of corrugated foil, feeding the strip into a loop forming a magazine, advancing the strip after said loop onto a perforated intermittently rotated suction drum so that the strip is periodically fed in cyclically repeated intermittent rotary movements alternating with predetermined stop periods, the strip carried on the drum being severed during the stop periods to form said cut portions, said cut portions being transferred at spaced intervals to the perforated periphery of a second, constantly driven suction drum, the cut portions being sucked firmly against the latter suction drum and advanced thereby, towards theadvancing base element, applying molten solder to thE cut portions, removing said portions from the second drum and feeding the same into abutment with the advancing base element, cooling the solder to solidify the same whereafter the base element is cut in the intervals between the corrugated cut portions soldered to the base element.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |