JPS61154062U - - Google Patents
Info
- Publication number
- JPS61154062U JPS61154062U JP3703385U JP3703385U JPS61154062U JP S61154062 U JPS61154062 U JP S61154062U JP 3703385 U JP3703385 U JP 3703385U JP 3703385 U JP3703385 U JP 3703385U JP S61154062 U JPS61154062 U JP S61154062U
- Authority
- JP
- Japan
- Prior art keywords
- plantain
- cover
- document
- reflectance
- logic circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 241000234295 Musa Species 0.000 claims 4
- 235000003805 Musa ABB Group Nutrition 0.000 claims 4
- 235000015266 Plantago major Nutrition 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
Landscapes
- Facsimile Scanning Arrangements (AREA)
Description
第1図は本考案による原稿サイズ検知装置の斜
視図、第2図はブロツク回路図、第3図は側面図
、第4図および第5図は波形図である。
1……原稿、2……プラテンガラス、3……イ
メージスキヤナ、4……プラテンカバー、5……
スプール、6……モータ、7……アーム、8……
ソレノイド、9……ガイドローラ、10……フオ
トセンサ、11……基準電圧発生回路、12,1
3,14……抵抗器、15……基準電圧切換スイ
ツチ、16……コンパレータ、17……インバー
タ、18……位相切換スイツチ、19……メモリ
切換スイツチ、20,21……メモリ、22……
OR回路、23……出力端子。
FIG. 1 is a perspective view of a document size detection device according to the present invention, FIG. 2 is a block circuit diagram, FIG. 3 is a side view, and FIGS. 4 and 5 are waveform diagrams. 1... Original, 2... Platen glass, 3... Image scanner, 4... Platen cover, 5...
Spool, 6...Motor, 7...Arm, 8...
Solenoid, 9... Guide roller, 10... Photo sensor, 11... Reference voltage generation circuit, 12, 1
3, 14...Resistor, 15...Reference voltage selection switch, 16...Comparator, 17...Inverter, 18...Phase selection switch, 19...Memory selection switch, 20, 21...Memory, 22...
OR circuit, 23...output terminal.
Claims (1)
ともに上記プランテンカバーを走査するイメージ
スキヤナとを備えた画像入力装置において、上記
プランテンカバーの反射率を高反射率と低反射率
に切り換える手段と、プランテンカバーの反射率
が切り換えられたそれぞれの状態で、上記イメー
ジスキヤナから得られた信号を基準値と比較する
手段と、この比較手段からの各比較出力の対応す
る走査時刻における論理和を単位走査期間にわた
つてとる論理回路と、この論理回路から得られた
信号のパルス幅によつて上記原稿のサイズを検知
する手段を設けたことを特徴とする原稿サイズ検
知装置。 In an image input device including a plantain cover that holds down a document, and an image scanner that scans the plantain cover together with the document, means for switching the reflectance of the plantain cover between high reflectance and low reflectance; Means for comparing the signal obtained from the image scanner with a reference value in each state in which the reflectance of the plantain cover is switched, and a logical sum of each comparison output from the comparison means at the corresponding scanning time. A document size detecting device comprising: a logic circuit that operates over a unit scanning period; and means for detecting the size of the document based on the pulse width of a signal obtained from the logic circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3703385U JPS61154062U (en) | 1985-03-14 | 1985-03-14 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3703385U JPS61154062U (en) | 1985-03-14 | 1985-03-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61154062U true JPS61154062U (en) | 1986-09-24 |
Family
ID=30542767
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3703385U Pending JPS61154062U (en) | 1985-03-14 | 1985-03-14 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61154062U (en) |
-
1985
- 1985-03-14 JP JP3703385U patent/JPS61154062U/ja active Pending