US3638282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper holddown clip
Assignee: Mattel Inc
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Filing: 1971-01-13
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Granted: 1972-02-01
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Expires: 1991-01-13
Abstract
Abstract An economical drawing board including a sheet-holding frame with brackets formed thereon, and a pair of clamps for sliding along the brackets to hold down a sheet of paper against the frame. Each bracket has an inclined guide wall, and each clamp has a pair of runners for moving along the guide wall and a paperengaging portion depending from one end of the runners to engage and hold down a sheet of paper. In order to prevent removal and loss of the clamps, the frame has a slot below each guide wall, and one runner has an elongated retainer member that abuts an end wall of the slot when the clamp is slid in a direction to remove it from the bracket.
Inventors
- 👤 Ake L Larsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:44
CPC Classifications
B; B42; B42F; B42F9/00; B42F9/001; Y; Y10; Y10T; Y10T24/00; Y10T24/20; Y10T24/202
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
82 words
Apparatus for holding a sheet comprising: a frame having a flat sheet-supporting region and a plurality of brackets, each bracket having walls defining an elongated guide which is inclined from the plane of said flat sheet-supporting region; and a plurality of clamps, each having an elongated runner portion formed to slide along said guide and a sheet-engaging portion depending from one end of said runner portion, whereby said sheet-engaging portion moves down against a sheet as clamp is slid along said guide.
Claim 2
Dependent Claim
82 words
Apparatus for holding a sheet comprising: a frame having a flat sheet-supporting region and a plurality of brackets, each bracket having walls defining an elongated guide which is inclined from the plane of said flat sheet-supporting region; and a plurality of clamps, each having an elongated runner portion formed to slide along said guide and a sheet-engaging portion depending from one end of said runner portion, whereby said sheet-engaging portion moves down against a sheet as clamp is slid along said guide.
Claim 3
Dependent Claim
108 words
The sheet-holding apparatus described in claim 1 wherein: each of said guides of said brackets has a forward end portion and a rearward end portion below the level of said forward end portion; said frame defines a slot extending rearwardly under each of said guides from a position beneath the forward end portion thereof; the runner portion of each of said clamps has forward and rearward ends, said sheet-engaging portion depending from said forward end; and each of said clamps has a resilient forwardly extending retainer portion for engaging the forward wall of said frame slot to prevent removal of said clamp after its insertion into said bracket.
Claim 4
Dependent Claim
77 words
The sheet-holding apparatus described in claim 1 wherein: the guide of each of said brackets includes a wall of predetermined thickness; and the runner portion of each clamp includes upper and lower elongated members extending substantially parallel to each other to hold said guide wall between them, said upper member having an upwardly looped portion at the end nearest said sheet-engaging portion, whereby to provide a finger hold for pulling out the clamp to release a sheet.
Claim 5
Dependent Claim
116 words
In a device for quickly receiving and releasing a sheet of paper or the like on a sheet-receiving surface of a frame, the improvement comprising: a bracket fixed to said frame, said bracket having a guide wall extending at an incline to said sheet-receiving surface, with a forward end above said surface and a rearward and below the level of said forward end; and a clamp constructed of resilient material, said clamp having a pair of spaced runner members slidably engaged with said guide wall to guide said clamp in forward and rearward movement therealong, sAid clamp also having a downwardly extending sheet-engaging portion for moving down against a sheet as said clamp is slid rearwardly.
Claim 6
Dependent Claim
116 words
In a device for quickly receiving and releasing a sheet of paper or the like on a sheet-receiving surface of a frame, the improvement comprising: a bracket fixed to said frame, said bracket having a guide wall extending at an incline to said sheet-receiving surface, with a forward end above said surface and a rearward and below the level of said forward end; and a clamp constructed of resilient material, said clamp having a pair of spaced runner members slidably engaged with said guide wall to guide said clamp in forward and rearward movement therealong, sAid clamp also having a downwardly extending sheet-engaging portion for moving down against a sheet as said clamp is slid rearwardly.
Claim 7
Dependent Claim
55 words
The improvement described in claim 4 wherein: said frame includes walls defining a ledge with a rearwardly facing surface; and said clamp includes an elongated resilient retainer member extending from said second runner to engage said rearwardly facing surface of said ledge when said clamp is moved forwardly, whereby to resist removal of said clamp.
Claim 8
Dependent Claim
95 words
The improvement described in claim 4 wherein: said bracket has a pair of laterally spaced upstanding walls and said guide wall extends laterally between said upstanding walls and has a slot extending along its length; and said pair of runner members includes a first runner member lying on top of the upper surface of said guide wall and a second runner member lying below the lower surface of said guide wall and between said upstanding walls, and said clamp includes a web joining said runner members and extending through said slot in said guide wall.
Claim 9
Dependent Claim
140 words
In a device for quickly receiving and releasing a sheet of paper or the like on a sheet-receiving surface of a frame that has brackets, wherein the brackets have a pair of sidewalls and an inclined upper wall, the improvement comprising: a clamp constructed of a resilient material, with a rear end for reception in said bracket and a front end for extending forward of said bracket, said front end including an elongated sheet holder with top and bottom portions, said clamp having an upper runner with an upwardly looped front portion extending from the top portion of said sheet holder and an elongated portion extending rearwardly therefrom, a lower runner extending rearwardly from a location on said sheet holder between the top and bottom portions thereof, and an elongated retainer extending forwardly from a location on said lower runner.
Claim 10
Dependent Claim
140 words
In a device for quickly receiving and releasing a sheet of paper or the like on a sheet-receiving surface of a frame that has brackets, wherein the brackets have a pair of sidewalls and an inclined upper wall, the improvement comprising: a clamp constructed of a resilient material, with a rear end for reception in said bracket and a front end for extending forward of said bracket, said front end including an elongated sheet holder with top and bottom portions, said clamp having an upper runner with an upwardly looped front portion extending from the top portion of said sheet holder and an elongated portion extending rearwardly therefrom, a lower runner extending rearwardly from a location on said sheet holder between the top and bottom portions thereof, and an elongated retainer extending forwardly from a location on said lower runner.
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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |