Claims
- 1. A method of cutting photographic paper bearing indicia for indicating locations of desired paper cuts, the method comprising:
- moving the photographic paper from an indicium to another indicium;
- sensing the distance the photographic paper was moved;
- storing a feed length signal indicative of the distance the photographic paper was moved;
- aligning a location of a desired paper cut with a reference mark;
- moving the photographic paper to an indicium;
- sensing the distance the photographic paper was moved;
- deriving a feed-after-sense signal from the feed length signal and the distance the photographic paper was moved from the location of a desired paper cut to an indicium;
- storing the feed-after-sense signal;
- advancing the photographic paper to an indicium and then beyond the indicium by a distance determined by the feed-after-sense signal; and
- cutting the photographic paper.
- 2. A method of cutting photographic prints from a strip of photographic paper bearing cut indicia which indicate desired cut locations, the method comprising:
- providing a feed length signal indicative of a distance between one cut indicium and another cut indicium;
- providing a signal indicative of a distance between a desired cut location and a cut indicium;
- deriving, from the feed length signal and the signal indicative of the distance between a desired cut location and a cut indicium, a feed-after-sense signal indicative of a distance the strip must be fed after a cut indicium is sensed in order to align the desired cut location associated with the sensed cut indicium with a knife assembly;
- storing the feed-after-sense signal;
- sensing cut indicium;
- advancing the strip the distance indicated by the feed-after-sense signal; and
- cutting the strip.
- 3. The method of claim 2 wherein providing a feed length signal comprises:
- moving the photographic paper by steps from one cut indicium to another cut indicium; and
- counting the steps required in moving the photographic paper to produce a first digital feed length signal.
- 4. The method of claim 3 wherein providing a signal indicative of a distance between a desired cut location and a cut indicium comprises:
- aligning the desired cut location with a reference mark;
- moving the photographic paper by steps until the cut indicium is sensed; and
- counting the steps required in moving the photographic paper to produce a second digital signal indicative of the distance between the desired cut location and the cut indicium.
- 5. The method of claim 4 and further comprising:
- storing a third digital signal indicative of the number of steps required to advance the photographic paper from a position at which cut indicia are sensed to a position at which the photographic paper is cut; and
- wherein deriving the feed-after-sense signal is as a function of the first, second, and third digital signals.
Parent Case Info
This is a division of application Ser. No. 838,000, filed Sept. 29, 1978, now U.S. Pat. No. 4,163,405.
US Referenced Citations (5)
Divisions (1)
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Number |
Date |
Country |
Parent |
838000 |
Sep 1978 |
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