Patent US3687223A successfully refreshed from Google Patents.
US3687223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound-retarding wall elements
Assignee: Rigips Stempel GmbH
•
Filing: 1971-01-12
•
Granted: 1972-08-29
•
Expires: 1991-01-12
Abstract
Abstract A sound-retarding wall element having outer sheets and a honeycomb core which is compressed to an irregularly folded shape to improve the sound insulating qualities of the element. Honeycomb spacers formed of easily broken material are inserted between the sheets along opposite side edges of the element to prevent collapse of the cone when the elements are attacked for transport or storage. A process for producing such soundretarding wall elements.
Inventors
- 👤 Friedrich Streck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:25
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/10; B32B3/12; E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/36; E04C2/365; B32B2307/00; B32B2307/10; B32B2307/102; E04B2001/742; E04B2001/748; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
118 words
Sound-retarding wall elements comprising two substantially parallel, spaced sheets, a core interposed between said sheets, said core comprising elastic honeycomb cells having an axis substantially perpendicular to each of said sheets, said honeycomb cells being folded over a portion of their axial length, and substantially rigid, brittle spacers interposed between said sheets and fixed to at least one of the sheets along at least one edge of the sheets, said spacers being formed of honeycomb cells of an absorptive material impregnated with a synthetic resin and having an axis substantially perpendicular to said sheets whereby the spacers provide structural strength to the elements and are adapted to be fractured to provide wall elements having elasticity to retard sound.
Claim 2
Dependent Claim
118 words
Sound-retarding wall elements comprising two substantially parallel, spaced sheets, a core interposed between said sheets, said core comprising elastic honeycomb cells having an axis substantially perpendicular to each of said sheets, said honeycomb cells being folded over a portion of their axial length, and substantially rigid, brittle spacers interposed between said sheets and fixed to at least one of the sheets along at least one edge of the sheets, said spacers being formed of honeycomb cells of an absorptive material impregnated with a synthetic resin and having an axis substantially perpendicular to said sheets whereby the spacers provide structural strength to the elements and are adapted to be fractured to provide wall elements having elasticity to retard sound.
Claim 3
Dependent Claim
18 words
Sound-retarding wall elements as defined in claim 1 wherein the walls of the core are formed of paper.
Claim 4
Dependent Claim
16 words
Sound-retarding wall elements as defined in claim 1 wherein the synthetic resin is a phenolic resin.
Claim 5
Dependent Claim
93 words
Process for the production of sound-retarding wall elements comprising the steps of forming a core of honeycomb cells, compressing the core to at least partially fold the honeycomb cells over their axial length to render the cells elastic, fixing the core to two parallel, spaced sheets whereby the axis of the cells is substantially perpendicular to the sheets, inserting brittle spacers formed of honeycomb cells of an absorptive material impregnated with a synthetic resin along at least one edge of the sheets and fixing the spacers to at least one of the sheets.
Claim 6
Dependent Claim
93 words
Process for the production of sound-retarding wall elements comprising the steps of forming a core of honeycomb cells, compressing the core to at least partially fold the honeycomb cells over their axial length to render the cells elastic, fixing the core to two parallel, spaced sheets whereby the axis of the cells is substantially perpendicular to the sheets, inserting brittle spacers formed of honeycomb cells of an absorptive material impregnated with a synthetic resin along at least one edge of the sheets and fixing the spacers to at least one of the sheets.
Claim 7
Dependent Claim
98 words
Process for the production of sound-retarding wall elements comprising the steps of forming a honeycomb core, fixing the honeycomb core between two substantially parallel spaced sheets whereby the axes of the cells are substantially perpendicular to the sheets, inserting spacers formed of rigid honeycombed cells having an adhesive on at least one end thereof, apply pressure to compress the honeycomb core to the height of the spacers whereby the honeycomb cells are at least partially compressed to form folds over their axial length and maintaining the pressure until a bond between the sheets and the spacers is established.
Claim 8
Dependent Claim
98 words
Process for the production of sound-retarding wall elements comprising the steps of forming a honeycomb core, fixing the honeycomb core between two substantially parallel spaced sheets whereby the axes of the cells are substantially perpendicular to the sheets, inserting spacers formed of rigid honeycombed cells having an adhesive on at least one end thereof, apply pressure to compress the honeycomb core to the height of the spacers whereby the honeycomb cells are at least partially compressed to form folds over their axial length and maintaining the pressure until a bond between the sheets and the spacers is established.
Claim 9
Dependent Claim
27 words
Process as defined in claim 5 wherein the pressure is exerted to compress the honeycomb core in a direction parallel to the axis of the honeycomb cells.
References Cited (Backward Citations)
US1925453A
Cited
US1932359A
Cited
US2187335A
Cited
US2728479A
Cited
US3141809A
Cited
FR1254208A
Cited
US3231439A
Cited
US3459274A
Cited
US3529693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |