US3690780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum actuated rotary drill
Assignee: Konica Minolta Graphic Imaging USA Inc
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Filing: 1971-02-26
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Granted: 1972-09-12
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Expires: 1991-02-26
Abstract
Abstract A motor-driven hollow drill member having a cylindrical bit or cutting edge to engage a sheet of photographic film or the like is rotationally and slidably supported in a housing connected to a vacuum pump by apertures communicating with the exterior and interior of the hollow drill. The bit end of the drill may protrude from one end of the housing which is adapted to be brought into vacuum contact with a sheet film. Upon the drill housing making contact with the film, the film is drawn into firm contact with the drill assembly and the bit is pneumatically urged into contact with the film to drill an accurate hole therein. As soon as the hole has been drilled, the vacuum is destroyed, the cut-out disc is sucked through the drill and the drill assembly is released from the surface of the film. The drill assembly finds its primary field of usefulness in the formation of register holes in one or more margins of a sheet of film being processed in a photomechanical camera as the first step in preparing a preregistered printing plate.
Inventors
- 👤 John Louis Bjelland
- 👤 Floyd W Flynn
- 👤 Norman C Schutt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:16
CPC Classifications
G; G03; G03F; G03F9/00; B; B23; B23B; B23B31/00; B23B31/02; B23B31/24; B23B31/30; B23B31/307; B23B41/00; B26; B26F; B26F1/00; B26F1/16; G03D; G03D15/00; G03D15/04; G03D15/043; G03D15/046; Y; Y10; Y10T; Y10T279/00; Y10T279/11; Y10T408/00; Y10T408/44; Y10T408/45; Y10T408/453; Y10T408/65; Y10T408/675; Y10T408/6757; Y10T83/00; Y10T83/566; Y10T83/748
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
181 words
A vacuum actuated rotary drill for drilling pre-registered holes in a sheet of photographic film or the like, comprising, in combination: a housing member; a rotatably driven hollow drill having a cutting bit at one end thereof; means mounting said drill for rotation within said housing member and also for axial movement with respect to said housing member; air porous means at one end of said housing member through which said drill is adapted to protrude, said air porous means also providing a contact surface for said film; means yieldably restraining said drill against axial movement through said porous member; and means for applying suction to the interior of said housing and to the interior of said drill; whereby upon engagement of said porous member with said sheet of film, said film is drawn against said housing member and said rotary drill is also axially moved into cutting position with respect to said film, and after the cutting of said film has been accomplished, said drill is retracted and said film is released from said contact surface of said porous means.
Claim 2
Dependent Claim
181 words
A vacuum actuated rotary drill for drilling pre-registered holes in a sheet of photographic film or the like, comprising, in combination: a housing member; a rotatably driven hollow drill having a cutting bit at one end thereof; means mounting said drill for rotation within said housing member and also for axial movement with respect to said housing member; air porous means at one end of said housing member through which said drill is adapted to protrude, said air porous means also providing a contact surface for said film; means yieldably restraining said drill against axial movement through said porous member; and means for applying suction to the interior of said housing and to the interior of said drill; whereby upon engagement of said porous member with said sheet of film, said film is drawn against said housing member and said rotary drill is also axially moved into cutting position with respect to said film, and after the cutting of said film has been accomplished, said drill is retracted and said film is released from said contact surface of said porous means.
Claim 3
Dependent Claim
47 words
A vacuum actuated rotary drill as claimed in claim 1, wherein the drill cutting but has a circumferentially extending cutting edge provided with identical, opposed concave portions, whereby the drill bit cuts with a shearing action at continuously moving points along the surface of the cutting edge.
Claim 4
Dependent Claim
164 words
A vacuum actuated rotary drill as claimed in claim 1, wherein said housing member includes an open front cavity and a rear vacuum chamber, said open front cavity carrying bearing means in which said drill is journalled for said rotation and said axial movement; and including sealing means secured to said drill in spaced relationship to said drill bit and in slidable sealing engagement with the wall of said front cavity, and sealing means at the forward end of said housing member adapted to provide a seal between said housing member and said film, whereby a front vacuum chamber is formed in said housing front cavity between said film and said drill sealing means; and wherein said drill includes aperture means at the opposite ends thereof communicating the hollow interior thereof with said front and rear vacuum chambers of said housing member, whereby said drill bit is drawn into cutting position with respect to sAid film by suction communicated to said front vacuum chamber.
Claim 5
Dependent Claim
89 words
A vacuum actuated rotary drill as claimed in claim 1, wherein said housing member includes a rear vacuum chamber, and including conduit means communicating a source of vacuum to said rear vacuum chamber, and wherein said hollow drill is open at its rear end and terminates within said rear vacuum chamber, whereby the cut-out portions of said film are sucked through said drill and said rear vacuum chamber into said conduit means; and including collecting means located in said conduit means for collecting said cut-out portions of said film.
Claim 6
Dependent Claim
57 words
A vacuum actuated rotary drill as claimed in claim 1, including a pulley wheel secured to said drill for rotation therewith, and motor-driven belt means for rotating said pulley wheel and said drill; and wherein said means yieldably restraining said drill against axial movement comprises means tensioning said belt means against a side of said pulley wheel.
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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |