US4615090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forming tool for producing an engraved motif on a sheet
Assignee: Altura Leiden Holding BV
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Filing: 1985-03-04
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Granted: 1986-10-07
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Expires: 2005-03-04
Abstract
Abstract A forming tool for the production of sheets, more particularly from a thermoplastic synthetic material, is in the form of a roller, a press, or a casting mould, and comprises, upon its outer surface, engraving elements in predetermined spatial relationship with each other. It is to be possible to produce sheets inexpensively with this apparatus, and production tolerances are low. The engraving elements are provided upon the outer surface, which is made of hard material, more particularly metal. The engraving elements project, above the outer surface, to a predetermined height, and the remainder of the outer surface exhibits a predetermined surface structure.
Inventors
- 👤 Heinz G. Baus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:09
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/22; B29C43/222; B29C33/00; B29C33/42; B29C48/00; B29C48/03; B29C48/07; B29C39/00; B29C48/13; B29C59/00; B29C59/02; B29C59/04; B29L; B29L2007/00; B29L2007/001; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24612; Y10T428/24628; Y10T428/24669; Y10T428/24736
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
89 words
A forming tool for producing an engraved motif on a sheet of material, said forming tool comprising a body having an outer surface and a plurality of engraving elements of predetermined height projecting outwardly of said outer surface and distributed on said outer surface according to a predetermined spacial arrangement, each said engraving element having an outer face on which is formed an inwardly curved depression of predetermined depth, the depth of each depression being less than the height of the engraving element on which the depression is formed.
Claim 2
Dependent Claim
89 words
A forming tool for producing an engraved motif on a sheet of material, said forming tool comprising a body having an outer surface and a plurality of engraving elements of predetermined height projecting outwardly of said outer surface and distributed on said outer surface according to a predetermined spacial arrangement, each said engraving element having an outer face on which is formed an inwardly curved depression of predetermined depth, the depth of each depression being less than the height of the engraving element on which the depression is formed.
Claim 3
Dependent Claim
28 words
A forming tool as claimed in claim 1, wherein said engraving elements have a curved outer contour in order to produce drop-like recesses in said sheet of material.
Claim 4
Dependent Claim
22 words
A forming tool as claimed in claim 1, wherein said outer surface has a surface finish which is a high gloss polish.
Claim 5
Dependent Claim
33 words
A forming tool as claimed in claim 3, wherein said body is formed with threaded bores opening outwardly onto said outer surface and said engraving elements are threaded pins screwed into said bores.
Claim 6
Dependent Claim
31 words
A forming tool as claimed in claim 3, wherein said body is formed with bores opening outwardly onto said outer surface and said engraving elements are pins welded into said bores.
Claim 7
Dependent Claim
31 words
A forming tool as claimed in claim 3, wherein said body is formed with bores opening outwardly onto said outer surface and said engraving elements are pins pressed into said bores.
Claim 8
Dependent Claim
65 words
A forming tool as claimed in claim 4, wherein said bores are threaded essentially along the full depth thereof, wherein said pins are threaded from the free ends thereof along a length shorter than said full depth of said bores, and wherein said pins are screwed into said bores with an unthreaded portion thereof, above said shorter threaded length, being force-threaded into said threaded bores.
Claim 9
Dependent Claim
17 words
A forming tool as claimed in claim 3, wherein said engraving elements are solid with said body.
Claim 10
Dependent Claim
20 words
A forming tool as claimed in claim 3, wherein each of said cavities defines, inwardly thereof, a predetermined decorative design.
Claim 11
Dependent Claim
21 words
A forming tool as claimed in claim 9, wherein said decorative design is shaped for the engraving of a water drop.
Claim 12
Dependent Claim
35 words
A forming tool as claimed in claim 3, wherein each of said engraving elements projects from said outer surface a distance at most equal to 40% of the thickness of a sheet to be engraved.
Claim 13
Dependent Claim
26 words
A forming tool as claimed in claim 3, wherein each of said engraving elements projects from said outer surface a distance equal to about 2 mm.
Claim 14
Dependent Claim
28 words
A forming tool as claimed in claim 3, wherein each of said engraving elements projects from said outer surface a distance equal to between 0.6 to 0.8 mm.
Claim 15
Dependent Claim
24 words
A forming tool as claimed in claim 11, wherein said engraving elements have, in cross-section, a major dimension at most equal to 60 mm.
Claim 16
Dependent Claim
14 words
A forming tool as claimed in claim 14, wherein said dimension is 20 mm.
Claim 17
Dependent Claim
17 words
A forming tool as claimed in claim 14, wherein said dimension is between 3 and 9 mm.
Claim 18
Dependent Claim
26 words
A forming tool as claimed in claim 3, wherein said body is selected from the class consisting of a roll, a press and a casting mould.
Claim 19
Dependent Claim
15 words
A forming tool as claimed in claim 3, wherein said body is made of metal.
Claim 20
Dependent Claim
101 words
A forming tool for producing an engraved motif on a sheet of material, said forming tool comprising: a first roll; a second roll having a plurality of radially outwardly projecting engraving elements of predetermined height distributed on its surface according to a predetermined spacial arrangement, each said engraving element having a radially outer face on which is formed an inward depression of predetermined depth, said second roll forming with said first roll a first gap for passage of said sheet of material; and a third roll forming with said second roll a second gap for passage of said sheet of material.
Claim 21
Dependent Claim
101 words
A forming tool for producing an engraved motif on a sheet of material, said forming tool comprising: a first roll; a second roll having a plurality of radially outwardly projecting engraving elements of predetermined height distributed on its surface according to a predetermined spacial arrangement, each said engraving element having a radially outer face on which is formed an inward depression of predetermined depth, said second roll forming with said first roll a first gap for passage of said sheet of material; and a third roll forming with said second roll a second gap for passage of said sheet of material.
Claim 22
Dependent Claim
20 words
A forming tool as claimed in claim 19, wherein said first and third rolls each have a substantially smooth surface.
Claim 23
Dependent Claim
105 words
A forming tool as claimed in claim 19, wherein said first, second and third rolls are arranged such that a strip of thermoplastic material may be passed through one of said first and second gaps and around said second roll through an angular range of at least 180° and thence through the other of said first and second gaps and around one of said first and third rolls whereby recesses formed in said thermoplastic material by the engraving elements on said second roll lie on the radially outwardly directed surface of said strip as it passes around said one of said first and third rolls.
Claim 24
Dependent Claim
21 words
A forming tool as claimed in claim 21, further comprising means for smoothing the surface of the strip of thermoplastic material.
Claim 25
Dependent Claim
29 words
A forming tool as claimed in claim 21, further comprising means for extruding a second strip of thermoplastic material and combining and smoothing said strips in said second gap.
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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) | 1989-10-06 | 1990-04-07 | 1990-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-06 | 1994-04-07 | 1994-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-06 | 1998-04-07 | 1998-10-07 | $7700.00 | Window Closed / Lapsed |