什(shen)么是(shi)裹背(bei)條，裹背(bei)條是(shi)通過皮殼機(ji)等機(ji)械用于精裝書(shu)本的(de)書(shu)脊部分(fen)，使書(shu)貼連接得更加牢固。書(shu)脊制作(zuo)弧長的(de)計算(suan)，本器規(gui)格依書(shu)芯幅面(mian)大小進行調定，以能將書(shu)芯平穩地送進夾書(shu)裝置內為(wei)標準。入本后(hou)的(de)書(shu)冊不斜歪，四(si)角垂直地頂(ding)齊在夾書(shu)裝置的(de)靠板(ban)、側(ce)規(gui)內。裁切(qie)尺寸正(zheng)確一致，其(qi)質量要求(qiu)與規(gui)格誤差與一般切(qie)書(shu)相同。

夾書簽絲(si)帶裝置安放(fang)在切(qie)(qie)書機與扒(ba)圓起(qi)脊(ji)機之間。即將(jiang)切(qie)(qie)完(wan)的(de)書芯，用(yong)分(fen)本器(qi)從中(zhong)間分(fen)開，再(zai)由輸放(fang)絲(si)帶器(qi)將(jiang)絲(si)帶夾入中(zhong)心(xin)紙書芯的(de)中(zhong)間靠訂(ding)縫一(yi)邊(bian)。絲(si)帶夾在書芯內兩端各留(liu)出粘邊(bian)和使用(yong)的(de)余地，再(zai)經(jing)切(qie)(qie)刀(dao)（剪刀(dao)式）將(jiang)其(qi)剪斷。

剪斷(duan)后的(de)絲(si)帶(dai)，裹背(bei)(bei)條(tiao)芯部(bu)分(fen)被下面膠輥著膠、壓實完成(cheng)夾書(shu)(shu)簽絲(si)帶(dai)過程。書(shu)(shu)簽絲(si)帶(dai)的(de)長(chang)度(du)與(yu)一(yi)般(ban)手工(gong)加工(gong)長(chang)度(du)基本相同，可依書(shu)(shu)冊幅面長(chang)度(du)調(diao)定。扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)操作(zuo)及要(yao)求。書(shu)(shu)芯經裁切、夾粘絲(si)帶(dai)（或不(bu)夾粘絲(si)帶(dai)）后，繼(ji)續傳(chuan)送（或翻轉(zhuan)(zhuan)(zhuan)變位）并做90°翻轉(zhuan)(zhuan)(zhuan)，使(shi)平(ping)(ping)放書(shu)(shu)芯變為(wei)(wei)后背(bei)(bei)朝上（或朝下）而進入扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)機(ji)。扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)機(ji)的(de)加工(gong)，其(qi)操作(zuo)分(fen)為(wei)(wei)兩(liang)步，但機(ji)器的(de)結構是連在一(yi)起(qi)的(de)，均是先扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)后起(qi)脊(ji)(ji)。扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)。扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)機(ji)在扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)時，由一(yi)組（或一(yi)對）圓(yuan)(yuan)(yuan)輥，將(jiang)書(shu)(shu)芯壓緊(jin)后作(zuo)相對旋轉(zhuan)(zhuan)(zhuan)動作(zuo)），使(shi)書(shu)(shu)背(bei)(bei)扒(ba)(ba)(ba)成(cheng)適(shi)當規格圓(yuan)(yuan)(yuan)勢，加工(gong)成(cheng)圓(yuan)(yuan)(yuan)背(bei)(bei)書(shu)(shu)芯。書(shu)(shu)芯書(shu)(shu)背(bei)(bei)的(de)形狀分(fen)為(wei)(wei)圓(yuan)(yuan)(yuan)背(bei)(bei)有(you)脊(ji)(ji)、圓(yuan)(yuan)(yuan)背(bei)(bei)無脊(ji)(ji)和方背(bei)(bei)（或稱平(ping)(ping)背(bei)(bei)）三種。平(ping)(ping)裝(zhuang)裹背(bei)(bei)條(tiao)書(shu)(shu)刊的(de)書(shu)(shu)脊(ji)(ji)不(bu)高出(chu)書(shu)(shu)芯平(ping)(ping)面，而精(jing)裝(zhuang)書(shu)(shu)刊的(de)書(shu)(shu)脊(ji)(ji)一(yi)般(ban)要(yao)高出(chu)書(shu)(shu)芯的(de)平(ping)(ping)面。書(shu)(shu)脊(ji)(ji)分(fen)為(wei)(wei)真脊(ji)(ji)和假脊(ji)(ji)。

真(zhen)脊(ji)(ji)是利用書(shu)(shu)背(bei)(bei)上下兩邊(bian)變形(xing)的(de)弧度(du)高(gao)出書(shu)(shu)芯(xin)平(ping)(ping)面；假脊(ji)(ji)則是利用紙板(ban)鑲在書(shu)(shu)背(bei)(bei)后形(xing)成的(de)書(shu)(shu)脊(ji)(ji)，書(shu)(shu)脊(ji)(ji)的(de)脊(ji)(ji)高(gao)等于封面紙板(ban)的(de)厚度(du)。方背(bei)(bei)書(shu)(shu)芯(xin)。是指書(shu)(shu)芯(xin)的(de)書(shu)(shu)背(bei)(bei)平(ping)(ping)直方正。書(shu)(shu)背(bei)(bei)不突出，與平(ping)(ping)裝書(shu)(shu)刊的(de)書(shu)(shu)背(bei)(bei)基本相(xiang)似(si)。

背(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)上下(xia)環(huan)襯互成(cheng)直角(jiao)，由于精(jing)裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)是用鎖線訂(ding)訂(ding)連(lian)，每一(yi)個書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)的(de)(de)(de)(de)(de)訂(ding)口折縫(feng)里面都用線串過，因此，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)背(bei)(bei)(bei)脊(ji)(ji)(ji)(ji)比書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)其它部分要(yao)厚(hou)(hou)(hou)(hou)一(yi)些，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍的(de)(de)(de)(de)(de)帖(tie)數(shu)越多，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)背(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)其它部分厚(hou)(hou)(hou)(hou)度(du)(du)(du)的(de)(de)(de)(de)(de)差別也越大。所以方背(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)的(de)(de)(de)(de)(de)形(xing)(xing)式一(yi)般只用于厚(hou)(hou)(hou)(hou)度(du)(du)(du)約(yue)為20mm的(de)(de)(de)(de)(de)精(jing)裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍。圓(yuan)背(bei)(bei)(bei)有(you)(you)(you)(you)脊(ji)(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)。圓(yuan)背(bei)(bei)(bei)有(you)(you)(you)(you)脊(ji)(ji)(ji)(ji)又稱圓(yuan)背(bei)(bei)(bei)真脊(ji)(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)背(bei)(bei)(bei)部呈圓(yuan)弧形(xing)(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)高(gao)起有(you)(you)(you)(you)脊(ji)(ji)(ji)(ji)壟(long)，堅硬挺實，這(zhe)種書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)的(de)(de)(de)(de)(de)形(xing)(xing)式適合于裝(zhuang)訂(ding)較厚(hou)(hou)(hou)(hou)的(de)(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍，裝(zhuang)上書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼后有(you)(you)(you)(you)明顯的(de)(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)槽(cao)，翻閱方便(bian)。目前我國(guo)的(de)(de)(de)(de)(de)精(jing)裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍多采用這(zhe)種圓(yuan)背(bei)(bei)(bei)有(you)(you)(you)(you)脊(ji)(ji)(ji)(ji)的(de)(de)(de)(de)(de)加工(gong)形(xing)(xing)式。圓(yuan)背(bei)(bei)(bei)無脊(ji)(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)。圓(yuan)背(bei)(bei)(bei)無脊(ji)(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)又稱圓(yuan)背(bei)(bei)(bei)假脊(ji)(ji)(ji)(ji)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)背(bei)(bei)(bei)部呈圓(yuan)弧形(xing)(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)的(de)(de)(de)(de)(de)厚(hou)(hou)(hou)(hou)度(du)(du)(du)相(xiang)同，堅實挺括，但沒有(you)(you)(you)(you)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)裹背(bei)(bei)(bei)條脊(ji)(ji)(ji)(ji)。這(zhe)種形(xing)(xing)式的(de)(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)，一(yi)般常(chang)與軟(ruan)質書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼或塑料壓(ya)制(zhi)而(er)成(cheng)的(de)(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼相(xiang)配套。中心紙有(you)(you)(you)(you)些機器(qi)(qi)還沒有(you)(you)(you)(you)沖圓(yuan)裝(zhuang)置(zhi)，即將方背(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)先(xian)(xian)進行(xing)沖圓(yuan)加工(gong)，作初步定(ding)型。先(xian)(xian)根據書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)厚(hou)(hou)(hou)(hou)度(du)(du)(du)和(he)中心紙幅面大小調定(ding)好(hao)夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器(qi)(qi)及扒(ba)圓(yuan)輥（或沖圓(yuan)裝(zhuang)置(zhi)）的(de)(de)(de)(de)(de)規矩，再使書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)進入夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器(qi)(qi)內(nei)并送到扒(ba)圓(yuan)輥之(zhi)間，將書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)扒(ba)擠(ji)成(cheng)一(yi)定(ding)圓(yuan)勢。