JPH0745299B2 - Carrier sheet - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a carrier sheet for gripping and transporting an easily damaged document such as a thin document in an apparatus for moving a document such as a facsimile. is there.

[Conventional technology]

FIG. 2 is a perspective view showing a conventional carrier sheet disclosed in, for example, Japanese Utility Model Laid-Open No. 60-25267, in which 1 is a cover sheet made of a transparent or matte translucent film and 2 is its cover sheet. The mount is made of paper or plastic. In an apparatus for moving an original such as a facsimile, an easily damaged original such as thin paper or an original such as carbon paper that easily stains the apparatus is sandwiched between a cover sheet 1 of a carrier sheet and a backing sheet 2 and made to travel. At this time, of course, the original surface is placed so that it faces the cover sheet.

FIG. 4 is a cross-sectional view of a transmitting section of a general facsimile machine, and 3 is an upper and lower guide plate, through which a document travels. 4 is a switch for detecting the leading edge and the trailing edge of the document, 5
Reference numerals 6 and 6 denote drive rollers for sandwiching and transporting the original, 7 is a light source, and 8 is a photoelectric converter for reading the original at a reading point 9.

Next, the operation will be described. The original sandwiched between the carrier sheets is conveyed by the driving roller 5 and travels in the direction of the arrow. When the leading edge of the carrier sheet reaches the reading point 9 after turning on the switch 4, the photoelectric converter 8 reads the original. Start.
When the rear end of the carrier sheet passes through the switch 4, the switch 4 detects this, and when the rear end of the carrier sheet reaches the reading point 9, the photoelectric converter 8 finishes the reading.

[Problems to be Solved by the Invention]

By the way, FIG. 3 shows an example in which a conventional A4 size carrier sheet is sandwiched with an A5 size original 10, and the dotted diagonal line portion is the original part. When such a carrier sheet is run through the apparatus shown in FIG. 4, the switch 4 detects the beginning and end of the carrier sheet without detecting the beginning and end of the document, so that the photoelectric converter 8 does not detect anything other than the document. There is a drawback in that the communication time is unnecessarily lengthened in the case of reading a necessary part and facsimile, and the user has to pay a useless communication charge.

Further, conventionally, there are some which are provided with a plurality of holes for detecting the length of the document, but in this case, when the trailing edge of the document comes between the holes, the length of the document cannot be strictly detected. Further, if the continuous holes are used, there is a serious drawback that the rigidity of the carrier sheet is remarkably lowered and weakened.

The present invention has been made to solve the above problems. For example, as shown in FIG. 3, even if a document such as A5 size is sandwiched between carrier sheets of A4 size, the start and end of the document are not changed. It is an object of the present invention to obtain a highly reliable carrier sheet that can be accurately detected and does not cause deterioration in rigidity.

[Means for Solving the Problems]

The carrier sheet according to the present invention is provided with a continuous strip-shaped reflecting portion along the traveling direction in a middle part of the mount of the carrier sheet.

[Action]

In the present invention, the switch detects the start and end of the carrier sheet and the strip-shaped reflection portion provided in the traveling direction of the carrier sheet and sets the end of the document.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a view corresponding to FIG. 3, in which a strip-shaped reflective tape 11 which is continuous over the entire length along the running direction of the carrier sheet is attached to a part of the middle of the mount 2.

In this way, light is not reflected at the portion hidden by the document 10, so that the length of the document can be accurately detected by detecting the reflected light.

However, in this case, the switch 4 is not a mechanical switch, but it is necessary to use a switch in which a light projector and an optical switch for detecting reflected light are combined, and a reflection plate for reflecting is provided below the guide 3. It is necessary to provide. In addition to the reflective tape 11, the same effect can be obtained by providing a reflective portion by means such as printing.

〔The invention's effect〕

As described above, according to the present invention, by providing a continuous strip-shaped reflection portion for detecting the original length of the carrier sheet in the middle of the mount of the carrier sheet, the length of the arbitrary length inserted into the carrier sheet can be increased. The original can be detected accurately, and even if an original shorter than the carrier sheet is inserted into the carrier sheet, the entire length of the carrier sheet is not read and transmitted. It is possible to accurately read and transmit only the length without making any difference, and therefore, it is possible to eliminate waste of communication cost. Further, the same effect can be obtained in the case of a document narrower than the carrier sheet.

[Brief description of drawings]

FIG. 1 shows a carrier sheet according to an embodiment of the present invention. FIG. 1 is a top view showing a state where a document is inserted in the carrier sheet, and FIG. 2 is a perspective view showing a conventional carrier sheet.
FIG. 3 is a top view showing a state in which a document is inserted into a conventional carrier sheet, and FIG. 4 is a perspective view showing a reading section of a general facsimile. In the figure, 1 is a cover sheet, 2 is a mount, 10 is a document, and 11 is a reflective tape. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A carrier sheet in which a cover sheet made of a transparent or translucent film is adhered onto a mount, and a manuscript is inserted between the covers so that the carrier travels in a facsimile or the like. A carrier sheet, characterized in that a strip-shaped light reflecting portion which is continuous over the entire length along the traveling direction of the carrier sheet is provided in a part of the above.