Patent US3227621A successfully refreshed from Google Patents.
Patent US3771932A successfully refreshed from Google Patents.
US3771932A
Expired / Lapsed
US
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Apparatus for the manufacture of bricks
Assignee: DAAL H VAN
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Filing: 1972-03-13
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Granted: 1973-11-13
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Expires: 1992-03-13
Abstract
Abstract A string of brick material is extruded, and at least one surface of the string is engaged with one or more rollers having surface projections, to form depressions in the string surface. An instrument, such as a smooth-surfaced roller, is then applied to the depression-bearing surface, there being relative movement between the surface and instrument in a direction generally parallel to the surface. As a result, the depressions are deformed, giving the surface the appearance of a hand-molded brick. Thereafter, the string is cut into individual bricks. A filler may be introduced into the depressions prior to their deformation. The upper edges of the extruded string may be rounded, and the upper cut edges of the bricks may be deformed by the tool which cuts the string into individual bricks.
Inventors
- 👤 Daal H Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:52
CPC Classifications
B; B28; B28B; B28B11/00; B28B11/08; B28B11/0818
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
140 words
An apparatus for producing bricks each having at least one surface resembling that of a hand-molded brick, comprising: a. an extruder for extruding a string of brick material, means forming part of said extruder for rounding the top surface of said string; b. a roller having surface projections for engaging the rounded top surface of the moving string and forming depressions therein, c. means for cutting said string into individual bricks, said cutting means including means spaced from the cutting edge for rounding off the cut upper edges of the individual bricks, and means for adjusting the spacing between the cutting edge and said rounding off means, and d. an instrument between said roller and cutting means for applying a pressure against the depression-bearing surface of the moving string to deform the surface depressions and flatten the rounded top surface.
Claim 2
Independent Claim
140 words
An apparatus for producing bricks each having at least one surface resembling that of a hand-molded brick, comprising: a. an extruder for extruding a string of brick material, means forming part of said extruder for rounding the top surface of said string; b. a roller having surface projections for engaging the rounded top surface of the moving string and forming depressions therein, c. means for cutting said string into individual bricks, said cutting means including means spaced from the cutting edge for rounding off the cut upper edges of the individual bricks, and means for adjusting the spacing between the cutting edge and said rounding off means, and d. an instrument between said roller and cutting means for applying a pressure against the depression-bearing surface of the moving string to deform the surface depressions and flatten the rounded top surface.
Claim 3
Dependent Claim
13 words
An apparatus as defined in claim 1 wherein said instrument is a roller.
Claim 4
Dependent Claim
14 words
An apparatus as defined in claim 2 wherein said roller has a smooth surface.
Claim 5
Dependent Claim
58 words
An apparatus as defined in claim 1 wherein said cutting means includes a bow, and a cutting element extending across said bow and having a cutting edge, and said rounding-off means includes a strip extending across said bow at a level above said cutting edge, and including means for adjusting the spacing between said strip and cutting edge.
Claim 6
Dependent Claim
21 words
An apparatus as defined in claim 4 wherein said strip has a V-shaped cross section terminating in a sharp lower edge.
Claim 7
Dependent Claim
16 words
An apparatus as defined in claim 5 wherein the converging edges of said strip are concave.
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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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |