Image forming apparatus

An image forming apparatus comprising:

• an image bearing member;
• image forming means for forming an image on said image bearing member, the image on said image bearing member being transferred to a transfer material at a transfer position;
• detecting means for detecting a kind of the transfer material;
• conveying means for conveying the transfer material to said transfer position;
• wherein a time period between a time when the image starts to be formed on said image bearing member by said image forming means and a time when the image on said image bearing member formed by said image forming means arrives at said transfer position is longer than a time period between a time when the kind of the transfer material is detected by said detecting means and a time when the transfer material arrives at said transfer position by said conveying means;
• and
• changeover means for changing over to a first mode for forming the image on said image bearing member by said image forming means on a basis of the kind of the transfer material detected by said detecting means, and a second mode for forming the image on said image bearing member by said image forming means without detecting the kind of the transfer material by said detecting means.

An image forming apparatus comprising:

• an image bearing member;
• image forming means for forming an image on said image bearing member, the image on said image bearing member being transferred to a transfer material;
• detecting means for detecting a kind of the transfer material;
• and
• containing means for containing transfer materials therein and detachably mountable to a main body of the apparatus;
• wherein after a dismounting and mounting of said containing means to the main body of the apparatus is performed, when an image is to be formed on a first transfer material, the image is formed on said image bearing member by said image forming means on a basis of a result of a detection by said detecting means, and when an image is to be formed on a next transfer material, the image is formed on said image bearing member by said image forming means on the basis of the result of the detection by said detecting means without the kind of the transfer material being detected by said detecting means.

An image forming apparatus comprising:

• an image bearing member;
• image forming means for forming an image on said image bearing member, the image on said image bearing member being transferred to a transfer material;
• and
• detecting means for detecting a kind of the transfer material;
• wherein after a power source switch of a main body of the apparatus is closed, when an image is to be formed on a first transfer material, the image is formed on said image bearing member by said image forming means on a basis of a result of a detection by said detecting means, and when an image is to be formed on a next transfer material, the image is formed on said image bearing member by said image forming means on the basis of the result of the detection by said detecting means without the kind of the transfer material being detected by said detecting means.

An image forming apparatus comprising:

• an image bearing member;
• image forming means for forming an image on said image bearing member;
• an intermediate transfer member to which the image is transferred from said image bearing member, the image on said intermediate transfer member being transferred to a transfer material at a transfer position;
• detecting means for detecting a kind of the transfer material;
• and
• changeover means for selectively changing over a first mode for forming the image on said image bearing member by said image forming means on a basis of the kind of the transfer material detected by said detecting means, and a second mode for forming the image on said image bearing member by said image forming means on a basis of a result of a detection by said detecting means in said first mode irrespective of whether or not kind of the transfer material is detected by said detecting means.

An image forming apparatus comprising:

• an image bearing member;
• image forming means for forming an image on said image bearing member, the image on said image bearing member being transferred to a transfer material at a transfer position;
• detecting means for detecting a kind of the transfer material;
• and
• changeover means for changing over to a first mode for forming the image on said image bearing member by said image forming means on a basis of the kind of the transfer material detected by said detecting means, and a second mode for forming the image on said image bearing member by said image forming means without detecting the kind of the transfer material by said detecting means.