[54] PRINTING APPARATUS AND PRINTING
METHOD WITH SECURITY PROTECTION
FOR CONFIDENTIAL DATA
[75] Inventors: Shigeru Ueda, Wako; Minoru
Kanbegawa, Komae, both of Japan
[73] Assignee: Canon Kabushiki Kaisha, Tokyo, Japan
[ * ] Notice: This patent issued on a continued prosecution application filed under 37 CFR 1.53(d), and is subject to the twenty year patent term provisions of 35 U.S.C. 154(a)(2).
[21] Appl. No.: 08/963,985 [22] Filed: Nov. 4, 1997
Related U.S. Application Data
[63] Continuation of application No. 08/343,869, Nov. 17, 1994, abandoned.
[30] Foreign Application Priority Data
Dec. 1, 1993 [JP] Japan 5-302025
Dec. 1, 1993 [JP] Japan 5-302029
[51] Int. CI.6 B41B 15/00; H04N 1/00
[52] U.S. CI 395/113; 395/116; 358/403;
358/402; 358/407; 380/23; 380/55; 340/825.34;
340/825.54
[58] Field of Search 395/113, 112,
395/114-117, 101, 834, 835, 874; 358/440, 402, 407, 403, 438, 444, 468, 434; 380/18, 21, 51, 23.55; 340/825.34, 825.54, 825.3
[56] References Cited
U.S. PATENT DOCUMENTS
4,843,571 6/1989 Notermans et al 395/117
5,077,795 12/1991 Rourke et al 380/55
5,130,818 7/1992 Tadokoro 358/402
5,224,156 6/1993 Fuller et al. .
5,261,000 11/1993 Hamamoto 380/23
5,283,665 2/1994 Dgata 358/402
5,351,136 9/1994 Wu et al 358/407
5,353,124 10/1994 Chou et al 358/407
5,386,303 1/1995 Kihara 358/453
5,452,099 9/1995 Von Meister 358/407
5,513,126 4/1996 Harkins et al 358/402
FOREIGN PATENT DOCUMENTS
0 208 342 1/1987 European Pat. Off. .
36 21 543 1/1987 Germany .
OTHER PUBLICATIONS
Mastering WordPerfect® 5.1 & 5.2 For WindowsTM, Alan
Simpson, 1993 SYBEX Inc. pp. 408-411.
Patent Abstracts of Japan, vol. 007, No. 258 (E-211), Nov.
17, 1983 & JP 58-142664 (Fujitsu KK), Aug. 24, 1983. Patent Abstracts of Japan, vol. 009, No. 281 (P-403), Nov. 8, 1985 & JP 60-122427 (Hitachi Seisakusho KK), Jun. 29, 1985.
Patent Abstracts of Japan, vol. 016, No. 286 (P-1376), Jun. 25, 1992 & JP 04-075128 (Fuji Xerox Co. Ltd.), Mar. 10, 1992.
Patent Abstracts of Japan, vol. 016, No. 580 (P-1461), Dec.
18, 1992 & JP 04-227525 (Fuji Xerox Co. Ltd.), Aug. 17, 1992.
Patent Abstracts of Japan, vol. 017, No. 664 (M-1523) Dec. 8, 1993 & JP 05-221089 (Canon Inc.), Aug. 31, 1993.
Primary Examiner—Dwayne D. Bost
Assistant Examiner—-Tracy M. Legree
Attorney, Agent, or Firm—Fitzpatrick, Cella, Harper &
Scinto
[57] ABSTRACT
The present invention provides a technique which can protect security of data until a regular user who transmits print data directs to start printing on the side of a printing apparatus even in an environment where a plurality of host computers on a network use a common printing apparatus, and which can print image data which has already been produced, as it is after the user gives instructions to start printing.
54 Claims, 13 Drawing Sheets
