Patent US3643306A successfully refreshed from Google Patents.
US3643306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for producing plastic foam{13 sheet metal panels
Assignee: Tru Lok Metal Fabricating Co Inc
•
Filing: 1970-01-06
•
Granted: 1972-02-22
•
Expires: 1990-01-06
Abstract
Abstract A machine and process to continuously produce sandwiched sheet metal rigid plastic foam panels provided with a metal forming unit, an injector for the plastic reactants, and an expansion confining apparatus, the foam-forming reactants being introduced into that portion of the metal panel that is ahead of the location where the metal panel enters the expansion confining apparatus to allow the foam formed to start expanding prior to entry of the panel into the expansion confining apparatus, the expansion confining apparatus being provided with a cavity conforming to the cross-sectional outline of the panel, that portion of the panel remaining in the cavity until full expansion has taken place before it is discharged from the confining apparatus.
Inventors
- 👤 Daniel Massagli
- 👤 Marino Ralph Massagli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:02
CPC Classifications
B; B21; B21D; B21D47/00; B21D47/01; B21D47/04; B29; B29C; B29C44/00; B29C44/20; B29C44/30; B29C44/306; B29C44/32; B29C44/326; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49888; Y10T29/51
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
50 words
A machine for continuously producing a sheet metal foamed rigid plastic sandwiched panel according to claim 1, wherein separate conduit means are provided for each of the foam-forming plastic reactants and in which the mixing means is positioned downstream from said lock forming means and is adjacent the discharge position.
Claim 2
Dependent Claim
91 words
A machine for continuously producing a sheet metal foamed rigid plastic sandwiched panel according to claim 1, wherein the belt means comprise continuous belts of elastomeric material, each belt provided with a contact surface corresponding in contour to the respective sides of said locked tubular sheet metal container with which it comes in contact, said elastomeric belts being attached to cleats in spaced relationship with each other, each of said cleats being secured to the outer surface of a chain link, said chain links being connected together to form a chain.
Claim 3
Dependent Claim
28 words
A machine for continuously producing a sheet metal foamed rigid plastic sandwiched panel according to claim 3, wherein the elastomeric material for forming said continuous belts is rubber.
Claim 4
Dependent Claim
58 words
A machine for continuously producing a sheet metal foamed rigid plastic sandwiched panel according to claim 1, wherein cutoff means are provided adjoining the discharge end of said expansion confining apparatus for cutting predetermined lengths of the fully expanded foam-filled sheet metal sandwich after the required length of said sandwich has been discharged from said expansion confining apparatus.
Claim 5
Dependent Claim
80 words
A machine for continuously producing a sheet metal foamed rigid plastic sandwiched panel according to claim 1, wherein said expansion confining apparatus is provided with a fixed first and second confining member positioned between the first and second movable belt means adjoining the respective sides thereof, said fixed confining members contacting the respective sides of said tubular sheet metal container intermediate the sides engaged by said movable belts means and limiting the expansion thereof during the foam-forming and expanding stage.
Claim 6
Dependent Claim
93 words
A machine for continuously producing a sheet metal foamed rigid plastic sandwiched panel according to claim 1, wherein the driving force of operating the roll-form and lock forming means is provided by the pressure created by the expansion of the foam forming plastic reactants in said tubular sheet metal container, said pressure forcing the sides of said container into tight contact with said flexible moving belt means, the motion of said Belt means being translated to the roll-form means and lock forming means by said sheet metal forming the tubular sheet metal container.
Claim 7
Dependent Claim
84 words
A machine for continuously producing a sheet metal rigid foam plastic sandwiched panel according to claim 1, wherein a plurality of jets are provided, each of said jets being directed to a different portion of the inner wall of said tubular container, all of said jets being positioned to blow compressed gas against the mixed foam forming plastic reactants as said reactants are being discharged from said mixer into said tubular container, with conduit means for supplying compressed gas to said plurality of jets.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |