US3594581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roll microfilm and retrieving device and method of retrieving
Assignee: Ricoh Co Ltd
•
Filing: 1968-11-20
•
Granted: 1971-07-20
•
Expires: 1988-11-20
Abstract
Abstract A roll microfilm-retrieving device wherein a plurality of small signal marks disposed in a predetermined unequally spaced relation with respect to each other in each side edge portion of each of frames of the film are detected by a detecting device wherein a plurality of detecting elements whose number is the same with that of signal marks are disposed in the same relation with said relation of said marks, whereby a desired frame is located or retrieved by a number or counts of detection of said detecting device.
Inventors
- 👤 Hajime Yamashita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:33
CPC Classifications
G; G06; G06K; G06K17/00; G06K17/0016; G06K17/0019
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
143 words
In a roll microfilm-retrieving device for use with a microfilm having a series of picture frames each including a marking means in the border thereof comprising: a transparent rotatable drum interposed between a pair of guide rolls over which the microfilm is advanced; a stationary light source located on one side of the periphery of said drum; and a plurality of detecting elements each having an optical axis and located on the other side of the periphery of said drum; the improvement comprising: said detecting elements having a disparate spacing between an intermediate detecting element and adjacent detecting elements; said spacings corresponding to the spacings within said marking means which comprise a group of small-size marks corresponding in number to said detecting elements; and said detecting elements simultaneously sensing all marks in a group as the microfilm is advanced past said light source.
Claim 2
Dependent Claim
143 words
In a roll microfilm-retrieving device for use with a microfilm having a series of picture frames each including a marking means in the border thereof comprising: a transparent rotatable drum interposed between a pair of guide rolls over which the microfilm is advanced; a stationary light source located on one side of the periphery of said drum; and a plurality of detecting elements each having an optical axis and located on the other side of the periphery of said drum; the improvement comprising: said detecting elements having a disparate spacing between an intermediate detecting element and adjacent detecting elements; said spacings corresponding to the spacings within said marking means which comprise a group of small-size marks corresponding in number to said detecting elements; and said detecting elements simultaneously sensing all marks in a group as the microfilm is advanced past said light source.
Claim 3
Dependent Claim
68 words
A device according to claim 1, in which the light source is located insidE of said transparent drum and includes a reflecting mirror, and the detecting elements are aligned in the direction of longitudinal advancement of the microfilm and located outside of said transparent drum on an arc so that each respective axis of said detecting elements passes through said microfilm and intersects the center of said drum.
Claim 4
Dependent Claim
113 words
In combination with a roll microfilm-retrieving device comprising a transparent rotatable drum interposed between a pair of guide rolls, a stationary light source located on one side of the periphery of said drum, and a plurality of spaced-apart detecting elements each having an optical axis and located on the other side of said drum; a microfilm including a series of picture frames each having a border therearound and adapted to be advanced on said drum, each frame of said microfilm having a group of at least three small-size marks located within said border, the spacings on either side of an intermediate mark being disparate and corresponding to the spacings of said detecting elements.
Claim 5
Dependent Claim
113 words
In combination with a roll microfilm-retrieving device comprising a transparent rotatable drum interposed between a pair of guide rolls, a stationary light source located on one side of the periphery of said drum, and a plurality of spaced-apart detecting elements each having an optical axis and located on the other side of said drum; a microfilm including a series of picture frames each having a border therearound and adapted to be advanced on said drum, each frame of said microfilm having a group of at least three small-size marks located within said border, the spacings on either side of an intermediate mark being disparate and corresponding to the spacings of said detecting elements.
Claim 6
Dependent Claim
234 words
A method of locating a desired position on a strip of material comprising the steps of providing a center mark and two outer marks on the strip, said marks being linearly arrayed parallel to a side of the strip, being positioned in a predetermined relation to the desired position, and being spaced with a first gap between one outer mark and the center mark different in length from a second gap between the center mark and the other outer mark; passing the strip along a strip path in a direction parallel to the side of the strip beneath three detecting means, said detecting means being adapted to register the presence of one of the marks at a detection station, the detection stations being located in the path of the marks as the strip moves along the strip path and being spaced apart by gaps equal to the first and second gaps whereby the center mark and the outer marks each simultaneously pass different detecting stations as the strip moves along the strip path; and registering on the detecting means the simultaneous presence of the outer marks and the center mark at the detection stations. 5 The method of claim 4 wherein the center mark and the outer marks are of a size not substantially exceeding the size of the largest blemish to which the strip of material is likely to be subjected during use.
Claim 7
Independent Claim
168 words
A device for locating a desired position on a strip of material, said strip of material having a center mark and two outer marks on opposite sides of the center mark, said marks being linearly arrayed parallel to a side edge of the strip in a predetermined relation to the desired position, and the first gap between one outer mark and the center mark being different in length from the second gap between the other outer mark and the center mark, said device comprising transport means for moving the strip in a direction parallel to the side edge thereof past three detection stations, said detection stations being in the path of the marks and spaced from each other by gaps equal to the first and second gaps whereby the center mark and the outer marks each simultaneously pass different detecting stations as the strip moves along the strip path; and detecting means for simultaneously detecting the presence at the detecting stations of the outer marks and center mark.
Claim 8
Independent Claim
168 words
A device for locating a desired position on a strip of material, said strip of material having a center mark and two outer marks on opposite sides of the center mark, said marks being linearly arrayed parallel to a side edge of the strip in a predetermined relation to the desired position, and the first gap between one outer mark and the center mark being different in length from the second gap between the other outer mark and the center mark, said device comprising transport means for moving the strip in a direction parallel to the side edge thereof past three detection stations, said detection stations being in the path of the marks and spaced from each other by gaps equal to the first and second gaps whereby the center mark and the outer marks each simultaneously pass different detecting stations as the strip moves along the strip path; and detecting means for simultaneously detecting the presence at the detecting stations of the outer marks and center mark.
Claim 9
Dependent Claim
28 words
The device of claim 6 wherein the detecting means is sufficiently sensitive to be activated by marks of magnitude equal to the reasonably expectable blemishes on the strip.
Claim 10
Independent Claim
221 words
A device comprising: a microfilm strip adapted for projection in a microfilm projector and having a border area adjacent an image-bearing area, said border area being subject to accidental marking by blemishes not exceeding a given size; means for indicating a chosen location on the strip, said means comprising a center mark and two outer marks linearly positioned on either side of the center mark equidistant from an edge of the strip and placed in a predetermined position with regard to the chosen location, the gap between the center mark and one outer mark being different in length from the gap between the center mark and the other outer mark, said marks being of a size not substantially exceeding the given size; transport means for moving the strip in a direction parallel to the side edge thereof past three detection stations, said detection stations being in the path of the marks and spaced from each other by gaps equal to the first and second gaps whereby the center mark and the outer marks each simultaneously pass different strip path; and detecting means for simultaneously detecting the presence at the detecting stations of the outer marks and the center marks, said detecting means being sufficiently sensitive to be activated by marks of magnitude equal to the reasonably expectable blemishes on the strip.
Claim 11
Independent Claim
221 words
A device comprising: a microfilm strip adapted for projection in a microfilm projector and having a border area adjacent an image-bearing area, said border area being subject to accidental marking by blemishes not exceeding a given size; means for indicating a chosen location on the strip, said means comprising a center mark and two outer marks linearly positioned on either side of the center mark equidistant from an edge of the strip and placed in a predetermined position with regard to the chosen location, the gap between the center mark and one outer mark being different in length from the gap between the center mark and the other outer mark, said marks being of a size not substantially exceeding the given size; transport means for moving the strip in a direction parallel to the side edge thereof past three detection stations, said detection stations being in the path of the marks and spaced from each other by gaps equal to the first and second gaps whereby the center mark and the outer marks each simultaneously pass different strip path; and detecting means for simultaneously detecting the presence at the detecting stations of the outer marks and the center marks, said detecting means being sufficiently sensitive to be activated by marks of magnitude equal to the reasonably expectable blemishes on the strip.
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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |