Machine for the mechanical restoration of rare books and manuscripts |
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| 申请号 | US33161073 | 申请日 | 1973-02-12 | 公开(公告)号 | US3830692A | 公开(公告)日 | 1974-08-20 |
| 申请人 | YISSUM RES DEV CO; | 发明人 | ALKALAY E; SOCHACZEWER E; | ||||
| 摘要 | A machine for the mechanical restoration of papers and documents comprises a housing having a chamber, a screen over the upper end of the chamber for receiving the documents to be restored, a suction pump applying a vacuum to the lower face of the screen, a well overlying the screen for containing a mixture of water and the paper-restoring composition, and a hold-down member overlying the screen and movable through the well from an operative position pressing against the upper face of the document to hold it firmly against the upper face of the screen. The hold-down member is pivotable to an inoperative position, disengaged from the document and includes water-directing channels for directing the liquid adhering thereto to drain to its sides and then to the sides of the well rather than to drip downwardly onto the document in the middle of the well. | ||||||
| 权利要求 | 1. A machine for the mechanical restoration of documents, comprising, a housing having a chamber disposed therein, a screen over the upper end of the chamber and adapted to receive the document to be restored, a suction pump communicating with the chamber for applying a vacuum to the lower face of the screen, a well supported by the housing and overlying the screen for containing a liquid mixture of water and a restoring composition, and a hold-down member overlying the screen and movable through the well from an operative position engaging the upper face of the document to be restored and pressing it firmly against the upper face of the screen, to an inoperative position disengaged from the document to be restored, said hold-down member being pivotable on a horizontal axis and including liquid-directing channels for directing the liquid adhering thereto to drain to the sides of said member and then to the sides of the well when the member is moved through the well from the operative position to the inoperative position, rather than to drip downwardly into the middle of the well. 2. A machine according to claim 1, wherein said hold-down member comprises two sections each pivotably mounted on a horizontal axis at one side of the well from its inoperative position wherein the two sections are open, to its operative position wherein the two sections are closed with their free ends in abutting relation. 3. A machine according to claim 1, wherein said hold-down memBer includes a plurality of spaced elongated elements extending parallel to the horizontal pivotal axis of the hold-down member, each of said elements including a lower foot and an upper foot, the lower foot of each element underlying the upper foot of the next adjacent element. 4. A machine according to claim 3, wherein, in the operative position of the hold-down member, said elongated elements are disposed at about 45 degrees to the upper face of the screen, and their upper and lower feet are disposed parallel to the upper face of the screen. 5. A machine according to claim 1, further including a lower plastic mat formed with a rectangular matrix of ribs defining large rectangular openings underlying and supporting the screen. 6. A machine according to claim 5, wherein said screen includes a metal screen supported on said coarse lower plastic mat, and a fine metal screen supported on said coarse screen. 7. A machine according to claim 1, wherein said chamber includes baffles which prevent swirling of the water therein as it is exhausted by the suction pump. 8. A machine according to claim 1, wherein said well is pivotably mounted to the housing from an operative position over the screen to an inoperative position to facilitate placing the document to be restored on the screen, there being a liquid seal between the housing and the well when the latter is in its operative position. |
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